Version 4
SHEET 1 960 680
WIRE 224 80 224 64
WIRE 0 144 0 128
WIRE 224 176 224 160
WIRE -336 192 -432 192
WIRE -240 192 -336 192
WIRE -144 192 -240 192
WIRE -96 192 -144 192
WIRE -48 192 -96 192
WIRE 144 192 64 192
WIRE 208 192 224 176
WIRE 208 192 144 192
WIRE -432 240 -432 208
WIRE -336 240 -336 208
WIRE -240 240 -240 208
WIRE -144 240 -144 208
WIRE 0 272 0 240
WIRE -144 288 -144 240
WIRE 240 288 240 272
WIRE -240 368 -240 240
WIRE -144 384 -144 368
WIRE 240 384 240 368
WIRE -336 432 -336 240
WIRE -240 464 -240 448
WIRE -432 512 -432 240
WIRE -336 528 -336 512
WIRE -432 608 -432 592
FLAG -432 608 0
FLAG 240 384 0
FLAG 0 272 0
FLAG 0 128 Vdd
FLAG 240 272 Vdd
FLAG 224 64 Vdd
FLAG 144 192 O[0:3]
FLAG -96 192 IN[0:3]
FLAG -336 528 0
FLAG -240 464 0
FLAG -144 384 0
FLAG -144 240 IN[0]
FLAG -240 240 IN[1]
FLAG -336 240 IN[2]
FLAG -432 240 IN[3]
BUSTAP -432 192 -432 208
BUSTAP -336 192 -336 208
BUSTAP -240 192 -240 208
BUSTAP -144 192 -144 208
SYMBOL voltage -432 496 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 23 91 Left 0
SYMATTR Value PULSE(0 3.3 0 5n 5n 4u 8u)
SYMATTR InstName V3
SYMBOL voltage 240 272 R0
SYMATTR InstName Vdd
SYMATTR Value 3.3
SYMBOL inverter 0 192 R0
WINDOW 0 9 -37 Left 0
SYMATTR InstName X[0:3]
SYMBOL res 208 64 R0
SYMATTR InstName R[0:3]
SYMATTR Value 100K
SYMBOL voltage -336 416 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 94 Left 0
SYMATTR Value PULSE(0 3.3 0 5n 5n 2u 4u)
SYMATTR InstName V2
SYMBOL voltage -240 352 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 93 Left 0
SYMATTR Value PULSE(0 3.3 0 5n 5n 1u 2u)
SYMATTR InstName V1
SYMBOL voltage -144 272 R0
WINDOW 3 21 96 Left 0
SYMATTR Value PULSE(0 3.3 0 5n 5n .5u 1u)
SYMATTR InstName V0
TEXT 200 456 Left 0 !.tran 100u
TEXT 200 520 Left 0 !.lib models
TEXT 200 488 Left 0 !.save V(*?*) I(*?*)