From a3257154660fd16725af8dfdf0502cb6a150abfd Mon Sep 17 00:00:00 2001
From: suprraja
Date: Tue, 11 Mar 2025 03:32:00 +0000
Subject: Added SN74LS21 subcircuit

---
 library/SubcircuitLibrary/SN74LS21/D.lib           |   2 +
 library/SubcircuitLibrary/SN74LS21/NPN.lib         |   4 +
 .../SubcircuitLibrary/SN74LS21/SN74LS21-cache.lib  | 107 +++
 library/SubcircuitLibrary/SN74LS21/SN74LS21.cir    |  57 ++
 .../SubcircuitLibrary/SN74LS21/SN74LS21.cir.out    |  60 ++
 library/SubcircuitLibrary/SN74LS21/SN74LS21.pro    |  73 ++
 library/SubcircuitLibrary/SN74LS21/SN74LS21.sch    | 964 +++++++++++++++++++++
 library/SubcircuitLibrary/SN74LS21/SN74LS21.sub    |  54 ++
 .../SN74LS21/SN74LS21_Previous_Values.xml          |   1 +
 library/SubcircuitLibrary/SN74LS21/analysis        |   1 +
 10 files changed, 1323 insertions(+)
 create mode 100644 library/SubcircuitLibrary/SN74LS21/D.lib
 create mode 100644 library/SubcircuitLibrary/SN74LS21/NPN.lib
 create mode 100644 library/SubcircuitLibrary/SN74LS21/SN74LS21-cache.lib
 create mode 100644 library/SubcircuitLibrary/SN74LS21/SN74LS21.cir
 create mode 100644 library/SubcircuitLibrary/SN74LS21/SN74LS21.cir.out
 create mode 100644 library/SubcircuitLibrary/SN74LS21/SN74LS21.pro
 create mode 100644 library/SubcircuitLibrary/SN74LS21/SN74LS21.sch
 create mode 100644 library/SubcircuitLibrary/SN74LS21/SN74LS21.sub
 create mode 100644 library/SubcircuitLibrary/SN74LS21/SN74LS21_Previous_Values.xml
 create mode 100644 library/SubcircuitLibrary/SN74LS21/analysis

(limited to 'library/SubcircuitLibrary')

diff --git a/library/SubcircuitLibrary/SN74LS21/D.lib b/library/SubcircuitLibrary/SN74LS21/D.lib
new file mode 100644
index 00000000..f53bf3e0
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/D.lib
@@ -0,0 +1,2 @@
+.model 1N4148 D(is=2.495E-09 rs=4.755E-01 n=1.679E+00 tt=3.030E-09 cjo=1.700E-12 vj=1 m=1.959E-01 bv=1.000E+02 ibv=1.000E-04)
+
diff --git a/library/SubcircuitLibrary/SN74LS21/NPN.lib b/library/SubcircuitLibrary/SN74LS21/NPN.lib
new file mode 100644
index 00000000..be5f3073
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/NPN.lib
@@ -0,0 +1,4 @@
+.model Q2N2222  NPN( Is=14.34f Xti=3 Eg=1.11 Vaf=74.03 Bf=400 Ne=1.307 
++ Ise=14.34f Ikf=0.2847 Xtb=1.5 Br=6.092 Nc=2 Isc=0 Ikr=0 Rc=1 Cjc=7.306p 
++ Mjc=0.3416 Vjc=0.75 Fc=0.5 Cje=22.01p Mje=0.377 Vje=0.75 Tr=46.91n Tf=411.1p 
++ Itf=0.6 Vtf=1.7 Xtf=3 Rb=10)
diff --git a/library/SubcircuitLibrary/SN74LS21/SN74LS21-cache.lib b/library/SubcircuitLibrary/SN74LS21/SN74LS21-cache.lib
new file mode 100644
index 00000000..2a23e8a6
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/SN74LS21-cache.lib
@@ -0,0 +1,107 @@
+EESchema-LIBRARY Version 2.3
+#encoding utf-8
+#
+# PORT
+#
+DEF PORT U 0 40 Y Y 26 F N
+F0 "U" 50 100 30 H V C CNN
+F1 "PORT" 0 0 30 H V C CNN
+F2 "" 0 0 60 H V C CNN
+F3 "" 0 0 60 H V C CNN
+DRAW
+A 325 225 285 -1421 -1278 0 1 0 N 100 50 150 0
+A 376 -275 356 1294 1408 0 1 0 N 150 0 100 -50
+S -100 50 100 -50 0 1 0 N
+X ~ 1 250 0 100 L 30 30 1 1 B
+X ~ 2 250 0 100 L 30 30 2 1 B
+X ~ 3 250 0 100 L 30 30 3 1 B
+X ~ 4 250 0 100 L 30 30 4 1 B
+X ~ 5 250 0 100 L 30 30 5 1 B
+X ~ 6 250 0 100 L 30 30 6 1 B
+X ~ 7 250 0 100 L 30 30 7 1 B
+X ~ 8 250 0 100 L 30 30 8 1 B
+X ~ 9 250 0 100 L 30 30 9 1 B
+X ~ 10 250 0 100 L 30 30 10 1 B
+X ~ 11 250 0 100 L 30 30 11 1 B
+X ~ 12 250 0 100 L 30 30 12 1 B
+X ~ 13 250 0 100 L 30 30 13 1 B
+X ~ 14 250 0 100 L 30 30 14 1 B
+X ~ 15 250 0 100 L 30 30 15 1 B
+X ~ 16 250 0 100 L 30 30 16 1 B
+X ~ 17 250 0 100 L 30 30 17 1 B
+X ~ 18 250 0 100 L 30 30 18 1 B
+X ~ 19 250 0 100 L 30 30 19 1 B
+X ~ 20 250 0 100 L 30 30 20 1 B
+X ~ 21 250 0 100 L 30 30 21 1 B
+X ~ 22 250 0 100 L 30 30 22 1 B
+X ~ 23 250 0 100 L 30 30 23 1 B
+X ~ 24 250 0 100 L 30 30 24 1 B
+X ~ 25 250 0 100 L 30 30 25 1 B
+X ~ 26 250 0 100 L 30 30 26 1 B
+ENDDRAW
+ENDDEF
+#
+# eSim_Diode
+#
+DEF eSim_Diode D 0 40 N N 1 F N
+F0 "D" 0 100 50 H V C CNN
+F1 "eSim_Diode" 0 -100 50 H V C CNN
+F2 "" 0 0 60 H V C CNN
+F3 "" 0 0 60 H V C CNN
+$FPLIST
+ TO-???*
+ *SingleDiode
+ *_Diode_*
+ *SingleDiode*
+ D_*
+$ENDFPLIST
+DRAW
+T 0 -100 50 60 0 0 0 A Normal 0 C C
+T 0 100 50 60 0 0 0 K Normal 0 C C
+P 2 0 1 6 50 50 50 -50 N
+P 3 0 1 0 -50 50 50 0 -50 -50 F
+X A 1 -150 0 100 R 40 40 1 1 P
+X K 2 150 0 100 L 40 40 1 1 P
+ENDDRAW
+ENDDEF
+#
+# eSim_NPN
+#
+DEF eSim_NPN Q 0 0 Y N 1 F N
+F0 "Q" -100 50 50 H V R CNN
+F1 "eSim_NPN" -50 150 50 H V R CNN
+F2 "" 200 100 29 H V C CNN
+F3 "" 0 0 60 H V C CNN
+ALIAS BC547 Q2N2222
+DRAW
+C 50 0 111 0 1 10 N
+P 2 0 1 0 25 25 100 100 N
+P 3 0 1 0 25 -25 100 -100 100 -100 N
+P 3 0 1 20 25 75 25 -75 25 -75 N
+P 5 0 1 0 50 -70 70 -50 90 -90 50 -70 50 -70 F
+X C 1 100 200 100 D 50 50 1 1 P
+X B 2 -200 0 225 R 50 50 1 1 P
+X E 3 100 -200 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# eSim_R
+#
+DEF eSim_R R 0 0 N Y 1 F N
+F0 "R" 50 130 50 H V C CNN
+F1 "eSim_R" 50 -50 50 H V C CNN
+F2 "" 50 -20 30 H V C CNN
+F3 "" 50 50 30 V V C CNN
+ALIAS resistor
+$FPLIST
+ R_*
+ Resistor_*
+$ENDFPLIST
+DRAW
+S 150 10 -50 90 0 1 10 N
+X ~ 1 -100 50 50 R 60 60 1 1 P
+X ~ 2 200 50 50 L 60 60 1 1 P
+ENDDRAW
+ENDDEF
+#
+#End Library
diff --git a/library/SubcircuitLibrary/SN74LS21/SN74LS21.cir b/library/SubcircuitLibrary/SN74LS21/SN74LS21.cir
new file mode 100644
index 00000000..085bb0ec
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/SN74LS21.cir
@@ -0,0 +1,57 @@
+* D:\FOSSEE\eSim\library\SubcircuitLibrary\SN74LS21\SN74LS21.cir
+
+* EESchema Netlist Version 1.1 (Spice format) creation date: 02/03/25 21:07:27
+
+* To exclude a component from the Spice Netlist add [Spice_Netlist_Enabled] user FIELD set to: N
+* To reorder the component spice node sequence add [Spice_Node_Sequence] user FIELD and define sequence: 2,1,0
+
+* Sheet Name: /
+R5  Net-_R1-Pad1_ Net-_D10-Pad1_ 20k		
+R6  Net-_R1-Pad1_ Net-_Q6-Pad2_ 10k		
+R7  Net-_R1-Pad1_ Net-_Q2-Pad2_ 8k		
+R8  Net-_R1-Pad1_ Net-_Q2-Pad1_ 75		
+Q2  Net-_Q2-Pad1_ Net-_Q2-Pad2_ Net-_D5-Pad1_ eSim_NPN		
+Q5  Net-_Q2-Pad1_ Net-_D5-Pad1_ Net-_Q10-Pad1_ eSim_NPN		
+R10  Net-_Q10-Pad1_ Net-_D5-Pad1_ 4.5k		
+Q10  Net-_Q10-Pad1_ Net-_D5-Pad2_ Net-_D11-Pad2_ eSim_NPN		
+R14  Net-_Q12-Pad1_ Net-_D5-Pad2_ 3k		
+R13  Net-_Q12-Pad2_ Net-_D5-Pad2_ 1.5k		
+Q12  Net-_Q12-Pad1_ Net-_Q12-Pad2_ Net-_D11-Pad2_ eSim_NPN		
+Q6  Net-_Q2-Pad2_ Net-_Q6-Pad2_ Net-_D5-Pad2_ eSim_NPN		
+Q8  Net-_Q6-Pad2_ Net-_D10-Pad1_ Net-_D12-Pad1_ eSim_NPN		
+D5  Net-_D5-Pad1_ Net-_D5-Pad2_ eSim_Diode		
+D8  Net-_D10-Pad1_ Net-_D19-Pad2_ eSim_Diode		
+D2  Net-_D10-Pad1_ Net-_D17-Pad2_ eSim_Diode		
+D6  Net-_D10-Pad1_ Net-_D18-Pad2_ eSim_Diode		
+D10  Net-_D10-Pad1_ Net-_D10-Pad2_ eSim_Diode		
+D18  Net-_D11-Pad2_ Net-_D18-Pad2_ eSim_Diode		
+D20  Net-_D11-Pad2_ Net-_D10-Pad2_ eSim_Diode		
+D19  Net-_D11-Pad2_ Net-_D19-Pad2_ eSim_Diode		
+D17  Net-_D11-Pad2_ Net-_D17-Pad2_ eSim_Diode		
+U1  Net-_D11-Pad2_ Net-_R1-Pad1_ Net-_D1-Pad2_ Net-_D17-Pad2_ Net-_Q3-Pad3_ Net-_D15-Pad2_ Net-_D18-Pad2_ Net-_Q10-Pad1_ Net-_D14-Pad2_ Net-_D19-Pad2_ Net-_D13-Pad2_ Net-_D10-Pad2_ ? ? PORT		
+D12  Net-_D12-Pad1_ Net-_D11-Pad2_ eSim_Diode		
+R2  Net-_R1-Pad1_ Net-_D1-Pad1_ 20k		
+R1  Net-_R1-Pad1_ Net-_Q4-Pad2_ 10k		
+R4  Net-_R1-Pad1_ Net-_Q1-Pad2_ 8k		
+R3  Net-_R1-Pad1_ Net-_Q1-Pad1_ 75		
+Q1  Net-_Q1-Pad1_ Net-_Q1-Pad2_ Net-_D3-Pad1_ eSim_NPN		
+Q3  Net-_Q1-Pad1_ Net-_D3-Pad1_ Net-_Q3-Pad3_ eSim_NPN		
+R9  Net-_Q3-Pad3_ Net-_D3-Pad1_ 4.5k		
+Q9  Net-_Q3-Pad3_ Net-_D3-Pad2_ Net-_D11-Pad2_ eSim_NPN		
+R11  Net-_Q11-Pad1_ Net-_D3-Pad2_ 3k		
+R12  Net-_Q11-Pad2_ Net-_D3-Pad2_ 1.5k		
+Q11  Net-_Q11-Pad1_ Net-_Q11-Pad2_ Net-_D11-Pad2_ eSim_NPN		
+Q4  Net-_Q1-Pad2_ Net-_Q4-Pad2_ Net-_D3-Pad2_ eSim_NPN		
+Q7  Net-_Q4-Pad2_ Net-_D1-Pad1_ Net-_D11-Pad1_ eSim_NPN		
+D3  Net-_D3-Pad1_ Net-_D3-Pad2_ eSim_Diode		
+D7  Net-_D1-Pad1_ Net-_D14-Pad2_ eSim_Diode		
+D1  Net-_D1-Pad1_ Net-_D1-Pad2_ eSim_Diode		
+D4  Net-_D1-Pad1_ Net-_D15-Pad2_ eSim_Diode		
+D9  Net-_D1-Pad1_ Net-_D13-Pad2_ eSim_Diode		
+D15  Net-_D11-Pad2_ Net-_D15-Pad2_ eSim_Diode		
+D13  Net-_D11-Pad2_ Net-_D13-Pad2_ eSim_Diode		
+D14  Net-_D11-Pad2_ Net-_D14-Pad2_ eSim_Diode		
+D16  Net-_D11-Pad2_ Net-_D1-Pad2_ eSim_Diode		
+D11  Net-_D11-Pad1_ Net-_D11-Pad2_ eSim_Diode		
+
+.end
diff --git a/library/SubcircuitLibrary/SN74LS21/SN74LS21.cir.out b/library/SubcircuitLibrary/SN74LS21/SN74LS21.cir.out
new file mode 100644
index 00000000..bbf40aa5
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/SN74LS21.cir.out
@@ -0,0 +1,60 @@
+* d:\fossee\esim\library\subcircuitlibrary\sn74ls21\sn74ls21.cir
+
+.include NPN.lib
+.include D.lib
+r5  net-_r1-pad1_ net-_d10-pad1_ 20k
+r6  net-_r1-pad1_ net-_q6-pad2_ 10k
+r7  net-_r1-pad1_ net-_q2-pad2_ 8k
+r8  net-_r1-pad1_ net-_q2-pad1_ 75
+q2 net-_q2-pad1_ net-_q2-pad2_ net-_d5-pad1_ Q2N2222
+q5 net-_q2-pad1_ net-_d5-pad1_ net-_q10-pad1_ Q2N2222
+r10  net-_q10-pad1_ net-_d5-pad1_ 4.5k
+q10 net-_q10-pad1_ net-_d5-pad2_ net-_d11-pad2_ Q2N2222
+r14  net-_q12-pad1_ net-_d5-pad2_ 3k
+r13  net-_q12-pad2_ net-_d5-pad2_ 1.5k
+q12 net-_q12-pad1_ net-_q12-pad2_ net-_d11-pad2_ Q2N2222
+q6 net-_q2-pad2_ net-_q6-pad2_ net-_d5-pad2_ Q2N2222
+q8 net-_q6-pad2_ net-_d10-pad1_ net-_d12-pad1_ Q2N2222
+d5 net-_d5-pad1_ net-_d5-pad2_ 1N4148
+d8 net-_d10-pad1_ net-_d19-pad2_ 1N4148
+d2 net-_d10-pad1_ net-_d17-pad2_ 1N4148
+d6 net-_d10-pad1_ net-_d18-pad2_ 1N4148
+d10 net-_d10-pad1_ net-_d10-pad2_ 1N4148
+d18 net-_d11-pad2_ net-_d18-pad2_ 1N4148
+d20 net-_d11-pad2_ net-_d10-pad2_ 1N4148
+d19 net-_d11-pad2_ net-_d19-pad2_ 1N4148
+d17 net-_d11-pad2_ net-_d17-pad2_ 1N4148
+* u1  net-_d11-pad2_ net-_r1-pad1_ net-_d1-pad2_ net-_d17-pad2_ net-_q3-pad3_ net-_d15-pad2_ net-_d18-pad2_ net-_q10-pad1_ net-_d14-pad2_ net-_d19-pad2_ net-_d13-pad2_ net-_d10-pad2_ ? ? port
+d12 net-_d12-pad1_ net-_d11-pad2_ 1N4148
+r2  net-_r1-pad1_ net-_d1-pad1_ 20k
+r1  net-_r1-pad1_ net-_q4-pad2_ 10k
+r4  net-_r1-pad1_ net-_q1-pad2_ 8k
+r3  net-_r1-pad1_ net-_q1-pad1_ 75
+q1 net-_q1-pad1_ net-_q1-pad2_ net-_d3-pad1_ Q2N2222
+q3 net-_q1-pad1_ net-_d3-pad1_ net-_q3-pad3_ Q2N2222
+r9  net-_q3-pad3_ net-_d3-pad1_ 4.5k
+q9 net-_q3-pad3_ net-_d3-pad2_ net-_d11-pad2_ Q2N2222
+r11  net-_q11-pad1_ net-_d3-pad2_ 3k
+r12  net-_q11-pad2_ net-_d3-pad2_ 1.5k
+q11 net-_q11-pad1_ net-_q11-pad2_ net-_d11-pad2_ Q2N2222
+q4 net-_q1-pad2_ net-_q4-pad2_ net-_d3-pad2_ Q2N2222
+q7 net-_q4-pad2_ net-_d1-pad1_ net-_d11-pad1_ Q2N2222
+d3 net-_d3-pad1_ net-_d3-pad2_ 1N4148
+d7 net-_d1-pad1_ net-_d14-pad2_ 1N4148
+d1 net-_d1-pad1_ net-_d1-pad2_ 1N4148
+d4 net-_d1-pad1_ net-_d15-pad2_ 1N4148
+d9 net-_d1-pad1_ net-_d13-pad2_ 1N4148
+d15 net-_d11-pad2_ net-_d15-pad2_ 1N4148
+d13 net-_d11-pad2_ net-_d13-pad2_ 1N4148
+d14 net-_d11-pad2_ net-_d14-pad2_ 1N4148
+d16 net-_d11-pad2_ net-_d1-pad2_ 1N4148
+d11 net-_d11-pad1_ net-_d11-pad2_ 1N4148
+.tran 0e-00 0e-00 0e-00
+
+* Control Statements 
+.control
+run
+print allv > plot_data_v.txt
+print alli > plot_data_i.txt
+.endc
+.end
diff --git a/library/SubcircuitLibrary/SN74LS21/SN74LS21.pro b/library/SubcircuitLibrary/SN74LS21/SN74LS21.pro
new file mode 100644
index 00000000..e27a398b
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/SN74LS21.pro
@@ -0,0 +1,73 @@
+update=22/05/2015 07:44:53
+version=1
+last_client=kicad
+[general]
+version=1
+RootSch=
+BoardNm=
+[pcbnew]
+version=1
+LastNetListRead=
+UseCmpFile=1
+PadDrill=0.600000000000
+PadDrillOvalY=0.600000000000
+PadSizeH=1.500000000000
+PadSizeV=1.500000000000
+PcbTextSizeV=1.500000000000
+PcbTextSizeH=1.500000000000
+PcbTextThickness=0.300000000000
+ModuleTextSizeV=1.000000000000
+ModuleTextSizeH=1.000000000000
+ModuleTextSizeThickness=0.150000000000
+SolderMaskClearance=0.000000000000
+SolderMaskMinWidth=0.000000000000
+DrawSegmentWidth=0.200000000000
+BoardOutlineThickness=0.100000000000
+ModuleOutlineThickness=0.150000000000
+[cvpcb]
+version=1
+NetIExt=net
+[eeschema]
+version=1
+LibDir=
+[eeschema/libraries]
+LibName1=adc-dac
+LibName2=memory
+LibName3=xilinx
+LibName4=microcontrollers
+LibName5=dsp
+LibName6=microchip
+LibName7=analog_switches
+LibName8=motorola
+LibName9=texas
+LibName10=intel
+LibName11=audio
+LibName12=interface
+LibName13=digital-audio
+LibName14=philips
+LibName15=display
+LibName16=cypress
+LibName17=siliconi
+LibName18=opto
+LibName19=atmel
+LibName20=contrib
+LibName21=power
+LibName22=eSim_Plot
+LibName23=transistors
+LibName24=conn
+LibName25=eSim_User
+LibName26=regul
+LibName27=74xx
+LibName28=cmos4000
+LibName29=eSim_Analog
+LibName30=eSim_Devices
+LibName31=eSim_Digital
+LibName32=eSim_Hybrid
+LibName33=eSim_Miscellaneous
+LibName34=eSim_Power
+LibName35=eSim_Sources
+LibName36=eSim_Subckt
+LibName37=eSim_Nghdl
+LibName38=eSim_Ngveri
+LibName39=eSim_SKY130
+LibName40=eSim_SKY130_Subckts
diff --git a/library/SubcircuitLibrary/SN74LS21/SN74LS21.sch b/library/SubcircuitLibrary/SN74LS21/SN74LS21.sch
new file mode 100644
index 00000000..2353b300
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/SN74LS21.sch
@@ -0,0 +1,964 @@
+EESchema Schematic File Version 2
+LIBS:adc-dac
+LIBS:memory
+LIBS:xilinx
+LIBS:microcontrollers
+LIBS:dsp
+LIBS:microchip
+LIBS:analog_switches
+LIBS:motorola
+LIBS:texas
+LIBS:intel
+LIBS:audio
+LIBS:interface
+LIBS:digital-audio
+LIBS:philips
+LIBS:display
+LIBS:cypress
+LIBS:siliconi
+LIBS:opto
+LIBS:atmel
+LIBS:contrib
+LIBS:power
+LIBS:eSim_Plot
+LIBS:transistors
+LIBS:conn
+LIBS:eSim_User
+LIBS:regul
+LIBS:74xx
+LIBS:cmos4000
+LIBS:eSim_Analog
+LIBS:eSim_Devices
+LIBS:eSim_Digital
+LIBS:eSim_Hybrid
+LIBS:eSim_Miscellaneous
+LIBS:eSim_Power
+LIBS:eSim_Sources
+LIBS:eSim_Subckt
+LIBS:eSim_Nghdl
+LIBS:eSim_Ngveri
+LIBS:eSim_SKY130
+LIBS:eSim_SKY130_Subckts
+LIBS:SN74LS21-cache
+EELAYER 25 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L resistor R5
+U 1 1 679F5732
+P 2700 1650
+F 0 "R5" H 2750 1780 50  0000 C CNN
+F 1 "20k" H 2750 1600 50  0000 C CNN
+F 2 "" H 2750 1630 30  0000 C CNN
+F 3 "" V 2750 1700 30  0000 C CNN
+	1    2700 1650
+	0    1    1    0   
+$EndComp
+$Comp
+L resistor R6
+U 1 1 679F5733
+P 3200 1650
+F 0 "R6" H 3250 1780 50  0000 C CNN
+F 1 "10k" H 3250 1600 50  0000 C CNN
+F 2 "" H 3250 1630 30  0000 C CNN
+F 3 "" V 3250 1700 30  0000 C CNN
+	1    3200 1650
+	0    1    1    0   
+$EndComp
+$Comp
+L resistor R7
+U 1 1 679F5734
+P 4100 1700
+F 0 "R7" H 4150 1830 50  0000 C CNN
+F 1 "8k" H 4150 1650 50  0000 C CNN
+F 2 "" H 4150 1680 30  0000 C CNN
+F 3 "" V 4150 1750 30  0000 C CNN
+	1    4100 1700
+	0    1    1    0   
+$EndComp
+$Comp
+L resistor R8
+U 1 1 679F5735
+P 5150 1700
+F 0 "R8" H 5200 1830 50  0000 C CNN
+F 1 "0.12" H 5200 1650 50  0000 C CNN
+F 2 "" H 5200 1680 30  0000 C CNN
+F 3 "" V 5200 1750 30  0000 C CNN
+	1    5150 1700
+	0    1    1    0   
+$EndComp
+$Comp
+L eSim_NPN Q2
+U 1 1 679F5736
+P 4500 2300
+F 0 "Q2" H 4400 2350 50  0000 R CNN
+F 1 "eSim_NPN" H 4450 2450 50  0000 R CNN
+F 2 "" H 4700 2400 29  0000 C CNN
+F 3 "" H 4500 2300 60  0000 C CNN
+	1    4500 2300
+	1    0    0    -1  
+$EndComp
+$Comp
+L eSim_NPN Q5
+U 1 1 679F5737
+P 5200 2700
+F 0 "Q5" H 5100 2750 50  0000 R CNN
+F 1 "eSim_NPN" H 5150 2850 50  0000 R CNN
+F 2 "" H 5400 2800 29  0000 C CNN
+F 3 "" H 5200 2700 60  0000 C CNN
+	1    5200 2700
+	1    0    0    -1  
+$EndComp
+$Comp
+L resistor R10
+U 1 1 679F5738
+P 4750 3050
+F 0 "R10" H 4800 3180 50  0000 C CNN
+F 1 "4.5k" H 4800 3000 50  0000 C CNN
+F 2 "" H 4800 3030 30  0000 C CNN
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+	1    4750 3050
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+	1    4500 3950
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+F 3 "" V 9350 1550 30  0000 C CNN
+	1    9300 1500
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+F 2 "" H 8850 1480 30  0000 C CNN
+F 3 "" V 8850 1550 30  0000 C CNN
+	1    8800 1500
+	0    -1   1    0   
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+F 2 "" H 7950 1530 30  0000 C CNN
+F 3 "" V 7950 1600 30  0000 C CNN
+	1    7900 1550
+	0    -1   1    0   
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+F 2 "" H 6900 1530 30  0000 C CNN
+F 3 "" V 6900 1600 30  0000 C CNN
+	1    6850 1550
+	0    -1   1    0   
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+F 0 "Q1" H 7400 2200 50  0000 R CNN
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+F 2 "" H 7700 2250 29  0000 C CNN
+F 3 "" H 7500 2150 60  0000 C CNN
+	1    7500 2150
+	-1   0    0    -1  
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+F 0 "Q3" H 6700 2600 50  0000 R CNN
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+F 2 "" H 7000 2650 29  0000 C CNN
+F 3 "" H 6800 2550 60  0000 C CNN
+	1    6800 2550
+	-1   0    0    -1  
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+F 2 "" H 7300 2880 30  0000 C CNN
+F 3 "" V 7300 2950 30  0000 C CNN
+	1    7250 2900
+	1    0    0    1   
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+F 0 "Q9" H 6700 3550 50  0000 R CNN
+F 1 "eSim_NPN" H 6750 3650 50  0000 R CNN
+F 2 "" H 7000 3600 29  0000 C CNN
+F 3 "" H 6800 3500 60  0000 C CNN
+	1    6800 3500
+	-1   0    0    -1  
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+P 7500 3800
+F 0 "R11" H 7550 3930 50  0000 C CNN
+F 1 "3k" H 7550 3750 50  0000 C CNN
+F 2 "" H 7550 3780 30  0000 C CNN
+F 3 "" V 7550 3850 30  0000 C CNN
+	1    7500 3800
+	0    1    -1   0   
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+P 7900 3800
+F 0 "R12" H 7950 3930 50  0000 C CNN
+F 1 "1.5k" H 7950 3750 50  0000 C CNN
+F 2 "" H 7950 3780 30  0000 C CNN
+F 3 "" V 7950 3850 30  0000 C CNN
+	1    7900 3800
+	0    1    -1   0   
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+U 1 1 679F5758
+P 7650 4350
+F 0 "Q11" H 7550 4400 50  0000 R CNN
+F 1 "eSim_NPN" H 7600 4500 50  0000 R CNN
+F 2 "" H 7850 4450 29  0000 C CNN
+F 3 "" H 7650 4350 60  0000 C CNN
+	1    7650 4350
+	-1   0    0    -1  
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+U 1 1 679F5759
+P 8150 2600
+F 0 "Q4" H 8050 2650 50  0000 R CNN
+F 1 "eSim_NPN" H 8100 2750 50  0000 R CNN
+F 2 "" H 8350 2700 29  0000 C CNN
+F 3 "" H 8150 2600 60  0000 C CNN
+	1    8150 2600
+	-1   0    0    -1  
+$EndComp
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+L eSim_NPN Q7
+U 1 1 679F575A
+P 8750 3000
+F 0 "Q7" H 8650 3050 50  0000 R CNN
+F 1 "eSim_NPN" H 8700 3150 50  0000 R CNN
+F 2 "" H 8950 3100 29  0000 C CNN
+F 3 "" H 8750 3000 60  0000 C CNN
+	1    8750 3000
+	-1   0    0    -1  
+$EndComp
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+L eSim_Diode D3
+U 1 1 679F575B
+P 7750 2950
+F 0 "D3" H 7750 3050 50  0000 C CNN
+F 1 "eSim_Diode" H 7750 2850 50  0000 C CNN
+F 2 "" H 7750 2950 60  0000 C CNN
+F 3 "" H 7750 2950 60  0000 C CNN
+	1    7750 2950
+	1    0    0    1   
+$EndComp
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+L eSim_Diode D7
+U 1 1 679F575C
+P 9400 3350
+F 0 "D7" H 9400 3450 50  0000 C CNN
+F 1 "eSim_Diode" H 9400 3250 50  0000 C CNN
+F 2 "" H 9400 3350 60  0000 C CNN
+F 3 "" H 9400 3350 60  0000 C CNN
+	1    9400 3350
+	1    0    0    1   
+$EndComp
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+L eSim_Diode D1
+U 1 1 679F575D
+P 9400 2700
+F 0 "D1" H 9400 2800 50  0000 C CNN
+F 1 "eSim_Diode" H 9400 2600 50  0000 C CNN
+F 2 "" H 9400 2700 60  0000 C CNN
+F 3 "" H 9400 2700 60  0000 C CNN
+	1    9400 2700
+	1    0    0    1   
+$EndComp
+$Comp
+L eSim_Diode D4
+U 1 1 679F575E
+P 9400 3000
+F 0 "D4" H 9400 3100 50  0000 C CNN
+F 1 "eSim_Diode" H 9400 2900 50  0000 C CNN
+F 2 "" H 9400 3000 60  0000 C CNN
+F 3 "" H 9400 3000 60  0000 C CNN
+	1    9400 3000
+	1    0    0    1   
+$EndComp
+$Comp
+L eSim_Diode D9
+U 1 1 679F575F
+P 9400 3700
+F 0 "D9" H 9400 3800 50  0000 C CNN
+F 1 "eSim_Diode" H 9400 3600 50  0000 C CNN
+F 2 "" H 9400 3700 60  0000 C CNN
+F 3 "" H 9400 3700 60  0000 C CNN
+	1    9400 3700
+	1    0    0    1   
+$EndComp
+$Comp
+L eSim_Diode D15
+U 1 1 679F5760
+P 10300 4850
+F 0 "D15" H 10300 4950 50  0000 C CNN
+F 1 "eSim_Diode" H 10300 4750 50  0000 C CNN
+F 2 "" H 10300 4850 60  0000 C CNN
+F 3 "" H 10300 4850 60  0000 C CNN
+	1    10300 4850
+	0    1    -1   0   
+$EndComp
+$Comp
+L eSim_Diode D13
+U 1 1 679F5761
+P 9650 4850
+F 0 "D13" H 9650 4950 50  0000 C CNN
+F 1 "eSim_Diode" H 9650 4750 50  0000 C CNN
+F 2 "" H 9650 4850 60  0000 C CNN
+F 3 "" H 9650 4850 60  0000 C CNN
+	1    9650 4850
+	0    1    -1   0   
+$EndComp
+$Comp
+L eSim_Diode D14
+U 1 1 679F5762
+P 9950 4850
+F 0 "D14" H 9950 4950 50  0000 C CNN
+F 1 "eSim_Diode" H 9950 4750 50  0000 C CNN
+F 2 "" H 9950 4850 60  0000 C CNN
+F 3 "" H 9950 4850 60  0000 C CNN
+	1    9950 4850
+	0    1    -1   0   
+$EndComp
+$Comp
+L eSim_Diode D16
+U 1 1 679F5763
+P 10650 4850
+F 0 "D16" H 10650 4950 50  0000 C CNN
+F 1 "eSim_Diode" H 10650 4750 50  0000 C CNN
+F 2 "" H 10650 4850 60  0000 C CNN
+F 3 "" H 10650 4850 60  0000 C CNN
+	1    10650 4850
+	0    1    -1   0   
+$EndComp
+$Comp
+L PORT U1
+U 3 1 679F5764
+P 11250 2700
+F 0 "U1" H 11300 2800 30  0000 C CNN
+F 1 "PORT" H 11250 2700 30  0000 C CNN
+F 2 "" H 11250 2700 60  0000 C CNN
+F 3 "" H 11250 2700 60  0000 C CNN
+	3    11250 2700
+	-1   0    0    1   
+$EndComp
+$Comp
+L PORT U1
+U 6 1 679F5765
+P 11250 2950
+F 0 "U1" H 11300 3050 30  0000 C CNN
+F 1 "PORT" H 11250 2950 30  0000 C CNN
+F 2 "" H 11250 2950 60  0000 C CNN
+F 3 "" H 11250 2950 60  0000 C CNN
+	6    11250 2950
+	-1   0    0    1   
+$EndComp
+$Comp
+L PORT U1
+U 9 1 679F5766
+P 11200 3300
+F 0 "U1" H 11250 3400 30  0000 C CNN
+F 1 "PORT" H 11200 3300 30  0000 C CNN
+F 2 "" H 11200 3300 60  0000 C CNN
+F 3 "" H 11200 3300 60  0000 C CNN
+	9    11200 3300
+	-1   0    0    1   
+$EndComp
+$Comp
+L PORT U1
+U 11 1 679F5767
+P 11200 3700
+F 0 "U1" H 11250 3800 30  0000 C CNN
+F 1 "PORT" H 11200 3700 30  0000 C CNN
+F 2 "" H 11200 3700 60  0000 C CNN
+F 3 "" H 11200 3700 60  0000 C CNN
+	11   11200 3700
+	-1   0    0    1   
+$EndComp
+$Comp
+L eSim_Diode D11
+U 1 1 679F5768
+P 8600 4700
+F 0 "D11" H 8600 4800 50  0000 C CNN
+F 1 "eSim_Diode" H 8600 4600 50  0000 C CNN
+F 2 "" H 8600 4700 60  0000 C CNN
+F 3 "" H 8600 4700 60  0000 C CNN
+	1    8600 4700
+	0    -1   1    0   
+$EndComp
+$Comp
+L PORT U1
+U 5 1 679F5769
+P 6100 2950
+F 0 "U1" H 6150 3050 30  0000 C CNN
+F 1 "PORT" H 6100 2950 30  0000 C CNN
+F 2 "" H 6100 2950 60  0000 C CNN
+F 3 "" H 6100 2950 60  0000 C CNN
+	5    6100 2950
+	1    0    0    1   
+$EndComp
+$Comp
+L PORT U1
+U 1 1 679F576A
+P 5700 950
+F 0 "U1" H 5750 1050 30  0000 C CNN
+F 1 "PORT" H 5700 950 30  0000 C CNN
+F 2 "" H 5700 950 60  0000 C CNN
+F 3 "" H 5700 950 60  0000 C CNN
+	1    5700 950 
+	0    1    1    0   
+$EndComp
+$Comp
+L PORT U1
+U 2 1 679F576B
+P 6050 950
+F 0 "U1" H 6100 1050 30  0000 C CNN
+F 1 "PORT" H 6050 950 30  0000 C CNN
+F 2 "" H 6050 950 60  0000 C CNN
+F 3 "" H 6050 950 60  0000 C CNN
+	2    6050 950 
+	0    1    1    0   
+$EndComp
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+	1000 2850 2450 2850
+Wire Wire Line
+	1000 3100 2450 3100
+Wire Wire Line
+	2450 3100 2450 3150
+Wire Wire Line
+	1050 3450 2450 3450
+Wire Wire Line
+	2450 3450 2450 3500
+Wire Wire Line
+	1050 3850 2450 3850
+Wire Wire Line
+	1350 4850 1350 2850
+Connection ~ 1350 2850
+Wire Wire Line
+	1700 4850 1700 3100
+Connection ~ 1700 3100
+Wire Wire Line
+	2050 4850 2050 3450
+Connection ~ 2050 3450
+Wire Wire Line
+	2350 4850 2350 3850
+Connection ~ 2350 3850
+Wire Wire Line
+	2750 3150 3050 3150
+Wire Wire Line
+	2750 1850 2750 3850
+Connection ~ 2750 3500
+Connection ~ 2750 3150
+Connection ~ 2750 2850
+Wire Wire Line
+	2750 1550 5200 1550
+Wire Wire Line
+	4150 1550 4150 1600
+Connection ~ 3250 1550
+Wire Wire Line
+	5200 1400 5200 1600
+Connection ~ 4150 1550
+Wire Wire Line
+	3350 1850 3350 2950
+Wire Wire Line
+	3350 1850 3250 1850
+Wire Wire Line
+	3650 2750 3350 2750
+Connection ~ 3350 2750
+Wire Wire Line
+	3950 2550 3950 2300
+Wire Wire Line
+	3950 2300 4300 2300
+Wire Wire Line
+	4150 1900 4150 2300
+Connection ~ 4150 2300
+Wire Wire Line
+	5200 1900 5200 2500
+Wire Wire Line
+	5200 2500 5300 2500
+Wire Wire Line
+	4600 2100 5200 2100
+Connection ~ 5200 2100
+Wire Wire Line
+	3950 2950 3950 3100
+Wire Wire Line
+	3950 3100 4100 3100
+Wire Wire Line
+	4400 3100 4550 3100
+Wire Wire Line
+	4850 3100 5650 3100
+Wire Wire Line
+	5300 2900 5300 3450
+Connection ~ 5300 3100
+Wire Wire Line
+	3350 3350 3350 4700
+Wire Wire Line
+	3350 4700 3400 4700
+Wire Wire Line
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+Connection ~ 4050 3100
+Wire Wire Line
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+Wire Wire Line
+	4050 4500 4050 4050
+Wire Wire Line
+	4450 4050 4450 4300
+Wire Wire Line
+	4450 3750 4450 3600
+Wire Wire Line
+	4050 3600 5000 3600
+Connection ~ 4050 3600
+Wire Wire Line
+	5000 3600 5000 3650
+Connection ~ 4450 3600
+Wire Wire Line
+	4600 2500 4450 2500
+Wire Wire Line
+	4450 2500 4450 3100
+Connection ~ 4450 3100
+Wire Wire Line
+	5000 2700 4450 2700
+Connection ~ 4450 2700
+Wire Wire Line
+	1350 5150 1350 5350
+Wire Wire Line
+	1350 5350 5300 5350
+Wire Wire Line
+	2350 5350 2350 5150
+Wire Wire Line
+	2050 5150 2050 5350
+Connection ~ 2050 5350
+Wire Wire Line
+	1700 5150 1700 5350
+Connection ~ 1700 5350
+Wire Wire Line
+	3400 5350 3400 5000
+Connection ~ 2350 5350
+Wire Wire Line
+	4450 5350 4450 4700
+Connection ~ 3400 5350
+Wire Wire Line
+	5300 5350 5300 3850
+Connection ~ 4450 5350
+Wire Wire Line
+	9550 2700 11000 2700
+Wire Wire Line
+	9550 2950 11000 2950
+Wire Wire Line
+	9550 2950 9550 3000
+Wire Wire Line
+	9550 3300 10950 3300
+Wire Wire Line
+	9550 3300 9550 3350
+Wire Wire Line
+	9550 3700 10950 3700
+Wire Wire Line
+	10650 4700 10650 2700
+Connection ~ 10650 2700
+Wire Wire Line
+	10300 4700 10300 2950
+Connection ~ 10300 2950
+Wire Wire Line
+	9950 4700 9950 3300
+Connection ~ 9950 3300
+Wire Wire Line
+	9650 4700 9650 3700
+Connection ~ 9650 3700
+Wire Wire Line
+	9250 3000 8950 3000
+Wire Wire Line
+	9250 1700 9250 3700
+Connection ~ 9250 3350
+Connection ~ 9250 3000
+Connection ~ 9250 2700
+Wire Wire Line
+	5200 1400 9250 1400
+Wire Wire Line
+	7850 1400 7850 1450
+Connection ~ 8750 1400
+Wire Wire Line
+	6800 1400 6800 1450
+Connection ~ 7850 1400
+Wire Wire Line
+	8650 1700 8650 2800
+Wire Wire Line
+	8650 1700 8750 1700
+Wire Wire Line
+	8350 2600 8650 2600
+Connection ~ 8650 2600
+Wire Wire Line
+	8050 2150 8050 2400
+Wire Wire Line
+	7700 2150 8050 2150
+Wire Wire Line
+	7850 1750 7850 2150
+Connection ~ 7850 2150
+Wire Wire Line
+	6800 1750 6800 2350
+Wire Wire Line
+	6800 2350 6700 2350
+Wire Wire Line
+	7400 1950 6800 1950
+Connection ~ 6800 1950
+Wire Wire Line
+	8050 2950 8050 2800
+Wire Wire Line
+	7900 2950 8050 2950
+Wire Wire Line
+	7450 2950 7600 2950
+Wire Wire Line
+	6350 2950 7150 2950
+Wire Wire Line
+	6700 2750 6700 3300
+Connection ~ 6700 2950
+Wire Wire Line
+	8650 3200 8650 4550
+Wire Wire Line
+	8650 4550 8600 4550
+Wire Wire Line
+	7950 2950 7950 3600
+Connection ~ 7950 2950
+Wire Wire Line
+	7850 4350 7950 4350
+Wire Wire Line
+	7950 4350 7950 3900
+Wire Wire Line
+	7550 3900 7550 4150
+Wire Wire Line
+	7550 3600 7550 3450
+Wire Wire Line
+	7000 3450 7950 3450
+Connection ~ 7950 3450
+Wire Wire Line
+	7000 3450 7000 3500
+Connection ~ 7550 3450
+Wire Wire Line
+	7400 2350 7550 2350
+Wire Wire Line
+	7550 2350 7550 2950
+Connection ~ 7550 2950
+Wire Wire Line
+	7000 2550 7550 2550
+Connection ~ 7550 2550
+Wire Wire Line
+	10650 5200 10650 5000
+Wire Wire Line
+	6700 5200 10650 5200
+Wire Wire Line
+	9650 5200 9650 5000
+Wire Wire Line
+	9950 5000 9950 5200
+Connection ~ 9950 5200
+Wire Wire Line
+	10300 5000 10300 5200
+Connection ~ 10300 5200
+Wire Wire Line
+	8600 5200 8600 4850
+Connection ~ 9650 5200
+Wire Wire Line
+	7550 5200 7550 4550
+Connection ~ 8600 5200
+Wire Wire Line
+	6700 5350 6700 3700
+Connection ~ 7550 5200
+Wire Wire Line
+	5250 5350 6700 5350
+Connection ~ 6700 5200
+Connection ~ 5250 5350
+Wire Wire Line
+	5650 5350 5650 1200
+Wire Wire Line
+	5650 1200 5700 1200
+Connection ~ 5650 5350
+Connection ~ 6800 1400
+Connection ~ 5200 1550
+Wire Wire Line
+	6050 1200 6050 1400
+Connection ~ 6050 1400
+$Comp
+L PORT U1
+U 13 1 679F6081
+P 7300 5700
+F 0 "U1" H 7350 5800 30  0000 C CNN
+F 1 "PORT" H 7300 5700 30  0000 C CNN
+F 2 "" H 7300 5700 60  0000 C CNN
+F 3 "" H 7300 5700 60  0000 C CNN
+	13   7300 5700
+	-1   0    0    1   
+$EndComp
+$Comp
+L PORT U1
+U 14 1 679F61AC
+P 5950 5750
+F 0 "U1" H 6000 5850 30  0000 C CNN
+F 1 "PORT" H 5950 5750 30  0000 C CNN
+F 2 "" H 5950 5750 60  0000 C CNN
+F 3 "" H 5950 5750 60  0000 C CNN
+	14   5950 5750
+	1    0    0    -1  
+$EndComp
+NoConn ~ 6200 5750
+NoConn ~ 7050 5700
+$EndSCHEMATC
diff --git a/library/SubcircuitLibrary/SN74LS21/SN74LS21.sub b/library/SubcircuitLibrary/SN74LS21/SN74LS21.sub
new file mode 100644
index 00000000..891c3d5f
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/SN74LS21.sub
@@ -0,0 +1,54 @@
+* Subcircuit SN74LS21
+.subckt SN74LS21 net-_d11-pad2_ net-_r1-pad1_ net-_d1-pad2_ net-_d17-pad2_ net-_q3-pad3_ net-_d15-pad2_ net-_d18-pad2_ net-_q10-pad1_ net-_d14-pad2_ net-_d19-pad2_ net-_d13-pad2_ net-_d10-pad2_ ? ? 
+* d:\fossee\esim\library\subcircuitlibrary\sn74ls21\sn74ls21.cir
+.include NPN.lib
+.include D.lib
+r5  net-_r1-pad1_ net-_d10-pad1_ 20k
+r6  net-_r1-pad1_ net-_q6-pad2_ 10k
+r7  net-_r1-pad1_ net-_q2-pad2_ 8k
+r8  net-_r1-pad1_ net-_q2-pad1_ 75
+q2 net-_q2-pad1_ net-_q2-pad2_ net-_d5-pad1_ Q2N2222
+q5 net-_q2-pad1_ net-_d5-pad1_ net-_q10-pad1_ Q2N2222
+r10  net-_q10-pad1_ net-_d5-pad1_ 4.5k
+q10 net-_q10-pad1_ net-_d5-pad2_ net-_d11-pad2_ Q2N2222
+r14  net-_q12-pad1_ net-_d5-pad2_ 3k
+r13  net-_q12-pad2_ net-_d5-pad2_ 1.5k
+q12 net-_q12-pad1_ net-_q12-pad2_ net-_d11-pad2_ Q2N2222
+q6 net-_q2-pad2_ net-_q6-pad2_ net-_d5-pad2_ Q2N2222
+q8 net-_q6-pad2_ net-_d10-pad1_ net-_d12-pad1_ Q2N2222
+d5 net-_d5-pad1_ net-_d5-pad2_ 1N4148
+d8 net-_d10-pad1_ net-_d19-pad2_ 1N4148
+d2 net-_d10-pad1_ net-_d17-pad2_ 1N4148
+d6 net-_d10-pad1_ net-_d18-pad2_ 1N4148
+d10 net-_d10-pad1_ net-_d10-pad2_ 1N4148
+d18 net-_d11-pad2_ net-_d18-pad2_ 1N4148
+d20 net-_d11-pad2_ net-_d10-pad2_ 1N4148
+d19 net-_d11-pad2_ net-_d19-pad2_ 1N4148
+d17 net-_d11-pad2_ net-_d17-pad2_ 1N4148
+d12 net-_d12-pad1_ net-_d11-pad2_ 1N4148
+r2  net-_r1-pad1_ net-_d1-pad1_ 20k
+r1  net-_r1-pad1_ net-_q4-pad2_ 10k
+r4  net-_r1-pad1_ net-_q1-pad2_ 8k
+r3  net-_r1-pad1_ net-_q1-pad1_ 75
+q1 net-_q1-pad1_ net-_q1-pad2_ net-_d3-pad1_ Q2N2222
+q3 net-_q1-pad1_ net-_d3-pad1_ net-_q3-pad3_ Q2N2222
+r9  net-_q3-pad3_ net-_d3-pad1_ 4.5k
+q9 net-_q3-pad3_ net-_d3-pad2_ net-_d11-pad2_ Q2N2222
+r11  net-_q11-pad1_ net-_d3-pad2_ 3k
+r12  net-_q11-pad2_ net-_d3-pad2_ 1.5k
+q11 net-_q11-pad1_ net-_q11-pad2_ net-_d11-pad2_ Q2N2222
+q4 net-_q1-pad2_ net-_q4-pad2_ net-_d3-pad2_ Q2N2222
+q7 net-_q4-pad2_ net-_d1-pad1_ net-_d11-pad1_ Q2N2222
+d3 net-_d3-pad1_ net-_d3-pad2_ 1N4148
+d7 net-_d1-pad1_ net-_d14-pad2_ 1N4148
+d1 net-_d1-pad1_ net-_d1-pad2_ 1N4148
+d4 net-_d1-pad1_ net-_d15-pad2_ 1N4148
+d9 net-_d1-pad1_ net-_d13-pad2_ 1N4148
+d15 net-_d11-pad2_ net-_d15-pad2_ 1N4148
+d13 net-_d11-pad2_ net-_d13-pad2_ 1N4148
+d14 net-_d11-pad2_ net-_d14-pad2_ 1N4148
+d16 net-_d11-pad2_ net-_d1-pad2_ 1N4148
+d11 net-_d11-pad1_ net-_d11-pad2_ 1N4148
+* Control Statements
+
+.ends SN74LS21
\ No newline at end of file
diff --git a/library/SubcircuitLibrary/SN74LS21/SN74LS21_Previous_Values.xml b/library/SubcircuitLibrary/SN74LS21/SN74LS21_Previous_Values.xml
new file mode 100644
index 00000000..deb147c6
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/SN74LS21_Previous_Values.xml
@@ -0,0 +1 @@
+<KicadtoNgspice><source /><model /><devicemodel><q2><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q2><q5><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q5><q10><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q10><q12><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q12><q6><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q6><q8><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q8><d5><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d5><d8><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d8><d2><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d2><d6><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d6><d10><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d10><d18><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d18><d20><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d20><d19><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d19><d17><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d17><d12><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d12><q1><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q1><q3><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q3><q9><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q9><q11><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q11><q4><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q4><q7><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Transistor\NPN.lib</field></q7><d3><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d3><d7><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d7><d1><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d1><d4><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d4><d9><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d9><d15><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d15><d13><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d13><d14><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d14><d16><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d16><d11><field>D:\FOSSEE\eSim\library\deviceModelLibrary\Diode\D.lib</field></d11></devicemodel><subcircuit /><analysis><ac><field1 name="Lin">true</field1><field2 name="Dec">false</field2><field3 name="Oct">false</field3><field4 name="Start Frequency" /><field5 name="Stop Frequency" /><field6 name="No. of points" /><field7 name="Start Fre Combo">Hz</field7><field8 name="Stop Fre Combo">Hz</field8></ac><dc><field1 name="Source 1" /><field2 name="Start" /><field3 name="Increment" /><field4 name="Stop" /><field5 name="Operating Point">0</field5><field6 name="Start Combo">Volts or Amperes</field6><field7 name="Increment Combo">Volts or Amperes</field7><field8 name="Stop Combo">Volts or Amperes</field8><field9 name="Source 2" /><field10 name="Start" /><field11 name="Increment" /><field12 name="Stop" /><field13 name="Start Combo">Volts or Amperes</field13><field14 name="Increment Combo">Volts or Amperes</field14><field15 name="Stop Combo">Volts or Amperes</field15></dc><tran><field1 name="Start Time" /><field2 name="Step Time" /><field3 name="Stop Time" /><field4 name="Start Combo">sec</field4><field5 name="Step Combo">sec</field5><field6 name="Stop Combo">sec</field6></tran></analysis></KicadtoNgspice>
\ No newline at end of file
diff --git a/library/SubcircuitLibrary/SN74LS21/analysis b/library/SubcircuitLibrary/SN74LS21/analysis
new file mode 100644
index 00000000..ebd5c0a9
--- /dev/null
+++ b/library/SubcircuitLibrary/SN74LS21/analysis
@@ -0,0 +1 @@
+.tran 0e-00 0e-00 0e-00
\ No newline at end of file
-- 
cgit