Version 4
SHEET 1 904 704
WIRE 336 0 144 0
WIRE 336 32 336 0
WIRE 288 80 256 80
WIRE 416 80 384 80
WIRE 336 112 336 80
WIRE 336 112 96 112
WIRE 256 176 256 80
WIRE 256 176 96 176
WIRE 416 176 416 80
WIRE 464 176 416 176
WIRE 192 240 96 240
WIRE 336 240 192 240
WIRE 256 288 256 176
WIRE 288 288 256 288
WIRE 336 288 336 240
WIRE 416 288 416 176
WIRE 416 288 384 288
WIRE 192 352 192 240
WIRE 144 384 144 0
WIRE 144 384 96 384
WIRE 160 384 144 384
WIRE 336 384 336 336
WIRE 336 384 256 384
WIRE 192 448 192 416
WIRE 192 464 192 448
FLAG 96 176 X
IOPIN 96 176 BiDir
FLAG 464 176 Y
IOPIN 464 176 BiDir
FLAG 96 240 VDD
IOPIN 96 240 In
FLAG 96 384 C
IOPIN 96 384 In
FLAG 96 112 VSS
IOPIN 96 112 In
FLAG 192 448 VSS
SYMBOL pmosb 288 336 R270
WINDOW 0 -19 88 VRight 0
WINDOW 3 -40 89 VRight 0
SYMATTR InstName M1
SYMATTR Value p90
SYMATTR Value2 l=0.25u w=20u m=10
SYMBOL nmosb 384 32 R90
WINDOW 0 11 121 VRight 0
WINDOW 3 -11 91 VRight 0
SYMATTR InstName M2
SYMATTR Value n90
SYMATTR Value2 l=0.25u w=10u m=10
SYMBOL inv 176 336 R0
SYMATTR InstName X1