Version 4
SHEET 1 1076 800
WIRE 304 112 256 112
WIRE 464 112 384 112
WIRE 0 224 0 208
WIRE 336 240 336 208
WIRE 176 256 160 256
WIRE 256 256 256 112
WIRE 256 256 240 256
WIRE 304 256 256 256
WIRE 464 272 464 112
WIRE 464 272 368 272
WIRE 496 272 464 272
WIRE 304 288 256 288
WIRE 0 320 0 304
WIRE 128 320 128 304
WIRE 336 336 336 304
WIRE 128 416 128 400
WIRE 256 416 256 288
WIRE 256 416 128 416
WIRE 352 416 256 416
WIRE 464 416 464 272
WIRE 464 416 416 416
WIRE 128 432 128 416
WIRE 128 528 128 512
FLAG 0 320 0
FLAG 0 208 +V
FLAG 336 208 +V
FLAG 336 336 0
FLAG 128 528 0
FLAG 128 304 +V
FLAG 160 256 0
FLAG 496 272 OUT
SYMBOL voltage 0 208 R0
SYMATTR InstName V1
SYMATTR Value 3.3
SYMBOL Comparators\\LTC1441 336 208 R0
SYMATTR InstName U1
SYMBOL misc\\xtal 416 400 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 Invisible 2
SYMATTR InstName C1
SYMATTR Value .39p
SYMATTR SpiceLine Rser=5K Lser=60 Cpar=3.9p
SYMBOL res 112 416 R0
SYMATTR InstName R1
SYMATTR Value 470K
SYMBOL res 112 304 R0
SYMATTR InstName R2
SYMATTR Value 1Meg
SYMBOL cap 240 240 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 10p
SYMBOL res 400 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 1.2Meg
TEXT 400 472 Left 2 !.tran 3m startup
TEXT 368 64 Bottom 2 ;32.768KHz "Watch Crystal" Oscillator