Version 4
SHEET 1 1356 680
WIRE 464 -192 -336 -192
WIRE 1200 -192 464 -192
WIRE 464 -144 464 -192
WIRE -208 -128 -272 -128
WIRE -64 -128 -128 -128
WIRE -256 -48 -272 -48
WIRE -96 -48 -176 -48
WIRE -64 -48 -96 -48
WIRE 464 -48 464 -64
WIRE 464 -48 384 -48
WIRE -896 32 -1184 32
WIRE -864 32 -896 32
WIRE -752 32 -864 32
WIRE -432 32 -464 32
WIRE -336 32 -336 -192
WIRE -336 32 -432 32
WIRE -64 32 -336 32
WIRE 416 32 384 32
WIRE -1184 48 -1184 32
WIRE -336 48 -336 32
WIRE 1200 80 1200 -192
WIRE -64 112 -80 112
WIRE -864 128 -864 32
WIRE -848 128 -864 128
WIRE -752 128 -768 128
WIRE -432 128 -432 32
WIRE -432 128 -464 128
WIRE -336 128 -336 112
WIRE -1184 144 -1184 128
WIRE -608 224 -608 192
WIRE 544 272 384 272
WIRE 944 272 624 272
WIRE 1040 272 1024 272
WIRE 1200 352 1200 160
WIRE 1200 352 384 352
WIRE -896 400 -896 32
WIRE 400 432 384 432
WIRE -896 496 -896 480
WIRE 400 496 400 432
WIRE 400 496 -896 496
WIRE -896 512 -896 496
WIRE -896 608 -896 592
FLAG -80 112 0
FLAG -96 -48 OUT
FLAG -336 128 0
FLAG -272 -128 0
FLAG -272 -48 0
FLAG 1040 272 0
FLAG 416 32 _WDO
FLAG -1184 144 0
FLAG -1184 32 IN
FLAG -896 608 0
FLAG -608 224 0
SYMBOL cap -352 48 R0
SYMATTR InstName C1
SYMATTR Value 100µ
SYMBOL VOLTAGE -112 -128 R90
WINDOW 123 53 56 VTop 2
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName V2
SYMATTR Value 1.8
SYMATTR SpiceLine Rser=10m
SYMBOL res -160 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100
SYMBOL res 448 -160 R0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL res 1184 64 R0
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL VOLTAGE 528 272 R270
WINDOW 123 -53 56 VBottom 2
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName V4
SYMATTR Value PULSE(0 2 0 1u 1u 20m 40m 6)
SYMATTR SpiceLine Rser=0.1
SYMBOL VOLTAGE 928 272 R270
WINDOW 123 -53 56 VBottom 2
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 2 0.4 1u 1u 20m 40m)
SYMATTR SpiceLine Rser=0.1
SYMBOL LTC695-3.3 160 160 R0
SYMATTR InstName U2
SYMBOL res -912 384 R0
SYMATTR InstName R6
SYMATTR Value 51K
SYMBOL res -912 496 R0
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL PowerProducts\\LT1129-3.3 -608 80 R0
SYMATTR InstName U1
SYMBOL res -864 144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL VOLTAGE -1184 32 R0
WINDOW 123 24 117 Left 2
SYMATTR Value PWL(20u 0 25u 7.5)
SYMATTR InstName V1
SYMATTR SpiceLine Rser=10m
TEXT 672 488 Left 2 !.tran 0.7