Version 4
SHEET 1 880 1012
WIRE -544 224 -544 160
WIRE -544 224 -800 224
WIRE -304 224 -544 224
WIRE -48 240 -96 240
WIRE 80 240 32 240
WIRE -48 272 -96 272
WIRE 80 272 32 272
WIRE -800 304 -800 224
WIRE -544 304 -544 224
WIRE -304 304 -304 224
WIRE -48 304 -96 304
WIRE 80 304 32 304
WIRE -304 448 -304 384
WIRE -800 496 -800 384
WIRE -800 496 -864 496
WIRE -736 496 -800 496
WIRE -544 496 -544 384
WIRE -368 496 -544 496
WIRE -864 512 -864 496
WIRE -736 512 -736 496
WIRE -912 576 -1088 576
WIRE -304 576 -304 544
WIRE -544 608 -544 496
WIRE -816 624 -816 576
WIRE -752 624 -816 624
WIRE -688 624 -688 576
WIRE -688 624 -752 624
WIRE -784 656 -784 576
WIRE -784 656 -1088 656
WIRE -752 656 -752 624
WIRE -608 656 -752 656
WIRE -304 672 -304 640
WIRE -192 672 -304 672
WIRE -160 672 -192 672
WIRE -304 704 -304 672
WIRE -192 704 -192 672
WIRE -80 704 -192 704
WIRE -192 736 -192 704
WIRE -544 752 -544 704
WIRE -368 752 -544 752
WIRE -80 752 -80 704
WIRE -544 800 -544 752
WIRE -192 880 -192 816
WIRE -80 880 -80 816
WIRE -544 928 -544 880
WIRE -304 928 -304 800
WIRE -304 928 -544 928
WIRE -304 976 -304 928
FLAG -304 976 0
FLAG -240 80 0
FLAG -240 0 VCC
FLAG -544 160 VCC
FLAG -1088 576 VA
FLAG -1088 656 VB
FLAG -160 672 Vout
FLAG -112 80 0
FLAG 16 80 0
FLAG -112 0 VA
FLAG 16 0 VB
FLAG -96 240 VA
FLAG -96 272 VB
FLAG -96 304 Vout
FLAG -192 880 0
FLAG -80 880 0
SYMBOL npn -688 512 R90
SYMATTR InstName Q1B
SYMBOL npn -816 512 R90
SYMATTR InstName Q1A
SYMBOL npn -608 608 R0
SYMATTR InstName Q2
SYMBOL npn -368 704 R0
SYMATTR InstName Q4
SYMBOL npn -368 448 R0
SYMATTR InstName Q3
SYMBOL res -816 288 R0
SYMATTR InstName R1
SYMATTR Value 4K
SYMBOL res -560 288 R0
SYMATTR InstName R2
SYMATTR Value 1.6K
SYMBOL res -320 288 R0
SYMATTR InstName R3
SYMATTR Value 130
SYMBOL diode -320 576 R0
SYMATTR InstName D1
SYMBOL res -560 784 R0
SYMATTR InstName R4
SYMATTR Value 1K
SYMBOL voltage -240 -16 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5V
SYMBOL voltage -112 -16 R0
WINDOW 3 24 104 Invisible 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 5 1m 1n 1n 1m 2m)
SYMATTR InstName V2
SYMBOL voltage 16 -16 R0
WINDOW 3 24 104 Invisible 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 5 2m 1n 1n 2m 4m)
SYMATTR InstName V3
SYMBOL dview5 -32 384 R0
SYMATTR InstName U1
SYMBOL res -208 720 R0
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL cap -96 752 R0
SYMATTR InstName C1
SYMATTR Value 10p
TEXT -1304 -40 Left 0 ;TTL NAND example
TEXT -992 464 Left 0 ;=
TEXT -1304 -8 Left 0 !.tran 5m
TEXT -1304 24 Left 0 !.include dview.lib
TEXT -1304 80 Left 0 ;1) VA = VB = HI, Vout = LO\nQ1 OFF, Q2 ON, Q4 active, Q3 and D1 OFF\n2) At least one input is LO, Vout = HI (0.8 drop from VCC min)\nQ1 ON, Q2 OFF, Q4 OFF, Q3 and D1 ON\nNOTE: current spikes drawn from the supply\nwhen going from LO to HI.\nUSE BYPASS CAPS.
TEXT -656 424 Left 0 ;Q1
LINE Normal -1152 480 -1056 480
LINE Normal -1104 480 -1104 464
LINE Normal -1104 480 -1104 480
LINE Normal -1056 528 -1088 480
LINE Normal -1136 504 -1120 480
LINE Normal -1131 509 -1136 504
LINE Normal -1152 528 -1131 509
LINE Normal -1140 499 -1152 528
LINE Normal -1135 505 -1140 499
LINE Normal -1152 504 -1136 480
LINE Normal -1147 509 -1152 504
LINE Normal -1168 528 -1147 509
LINE Normal -1156 499 -1168 528
LINE Normal -1151 505 -1156 499
RECTANGLE Normal -624 688 -960 448 2
RECTANGLE Normal -1195 448 -1024 544 2