Version 4 SHEET 1 1272 680 WIRE 480 -640 176 -640 WIRE 704 -640 480 -640 WIRE 480 -624 480 -640 WIRE 704 -624 704 -640 WIRE 704 -528 704 -544 WIRE 656 -512 608 -512 WIRE 480 -416 480 -544 WIRE 608 -416 608 -512 WIRE 608 -416 480 -416 WIRE 704 -416 704 -432 WIRE 848 -416 704 -416 WIRE 944 -416 848 -416 WIRE 704 -400 704 -416 WIRE 480 -384 480 -416 WIRE 608 -320 608 -416 WIRE 656 -320 608 -320 WIRE 432 -304 416 -304 WIRE 704 -288 704 -304 WIRE 944 -208 944 -416 WIRE 480 -192 480 -288 WIRE 704 -192 704 -208 WIRE 176 -160 176 -640 WIRE 480 -160 176 -160 WIRE 704 -160 480 -160 WIRE 480 -144 480 -160 WIRE 704 -144 704 -160 WIRE 704 -48 704 -64 WIRE 416 -32 416 -304 WIRE 656 -32 608 -32 WIRE 176 16 176 -160 WIRE 176 16 128 16 WIRE 176 32 176 16 WIRE 480 64 480 -64 WIRE 608 64 608 -32 WIRE 608 64 480 64 WIRE 704 64 704 48 WIRE 848 64 704 64 WIRE 944 64 944 -144 WIRE 944 64 848 64 WIRE 416 80 400 80 WIRE 432 80 416 80 WIRE 480 80 480 64 WIRE 704 80 704 64 WIRE 48 96 48 16 WIRE 304 112 304 96 WIRE 304 112 256 112 WIRE 416 112 416 80 WIRE 304 128 304 112 WIRE 416 160 416 112 WIRE 432 160 416 160 WIRE 608 160 608 64 WIRE 656 160 608 160 WIRE 704 192 704 176 WIRE 256 208 256 112 WIRE 304 208 256 208 WIRE 416 208 416 160 WIRE 416 208 384 208 WIRE 256 224 256 208 WIRE 48 288 48 176 WIRE 176 288 176 96 WIRE 480 288 480 176 WIRE 704 288 704 272 FLAG 256 288 0 FLAG 480 288 0 FLAG 48 288 0 FLAG 704 288 0 FLAG 480 -192 0 FLAG 704 -192 0 FLAG 848 64 A+ FLAG 848 -416 A- FLAG 176 288 0 SYMBOL Digital\\74hc132 352 48 R0 SYMATTR InstName U1 SYMATTR SpiceLine VCC=3.3 SPEED=1.0 TRIPDT=1e-9 SYMBOL res 400 192 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 250k SYMBOL cap 240 224 R0 SYMATTR InstName C1 SYMATTR Value 1n SYMBOL nmos 432 80 R0 SYMATTR InstName M1 SYMATTR Value Si1551_N SYMBOL res 464 -160 R0 WINDOW 3 39 76 Left 2 SYMATTR Value 330 SYMATTR InstName R2 SYMBOL voltage 48 80 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 5v SYMBOL nmos 656 80 R0 SYMATTR InstName M2 SYMATTR Value Si1551_N SYMBOL pmos 656 48 M180 SYMATTR InstName M3 SYMATTR Value Si1551_P SYMBOL nmos 432 -384 R0 SYMATTR InstName M4 SYMATTR Value Si1551_N SYMBOL res 464 -640 R0 SYMATTR InstName R3 SYMATTR Value 330 SYMBOL nmos 656 -400 R0 SYMATTR InstName M5 SYMATTR Value Si1551_N SYMBOL pmos 656 -432 M180 SYMATTR InstName M6 SYMATTR Value Si1551_P SYMBOL Digital\\74hc132 352 32 R270 SYMATTR InstName U2 SYMATTR SpiceLine VCC=3.3 SPEED=1.0 TRIPDT=1e-9 SYMBOL res 688 -640 R0 SYMATTR InstName R5 SYMATTR Value 3.3 SYMBOL res 688 -304 R0 SYMATTR InstName R6 SYMATTR Value 3.3 SYMBOL res 688 -160 R0 SYMATTR InstName R7 SYMATTR Value 3.3 SYMBOL res 688 176 R0 SYMATTR InstName R8 SYMATTR Value 3.3 SYMBOL cap 928 -208 R0 SYMATTR InstName C2 SYMATTR Value 200n SYMBOL cap 160 32 R0 SYMATTR InstName C3 SYMATTR Value 200µ SYMBOL res 144 32 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R4 SYMATTR Value 0.1 TEXT 792 256 Left 2 !.tran 0 1.4m 1m