Version 4
SHEET 1 880 680
WIRE 16 48 -16 48
WIRE 112 48 80 48
WIRE 160 48 112 48
WIRE 288 48 240 48
WIRE 336 48 288 48
WIRE 464 48 416 48
WIRE 560 48 464 48
WIRE 624 48 560 48
WIRE 112 80 112 48
WIRE -16 96 -16 48
WIRE 288 96 288 48
WIRE 464 96 464 48
WIRE 560 96 560 48
WIRE -16 208 -16 176
WIRE 288 208 288 176
WIRE 464 208 464 176
WIRE 560 208 560 160
FLAG -16 208 0
FLAG 288 208 0
FLAG 112 80 InvIN
FLAG 624 48 MCLK
FLAG 464 208 0
FLAG 560 208 0
FLAG -16 48 OSC
FLAG 288 48 InvOUT
SYMBOL voltage -16 80 M0
WINDOW 3 -596 198 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName Vosc
SYMATTR Value PULSE({VCCosc/2-0.4} {VCCosc/2+0.4} 0 {trf} {trf} {1/fosc/2-trf} {1/fosc})
SYMATTR Value2 ""
SYMATTR SpiceLine ""
SYMBOL cap 80 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C325
SYMATTR Value 1n
SYMBOL bv 288 80 M0
WINDOW 3 -407 166 Left 2
SYMATTR InstName Binv
SYMATTR Value V=limit(Ainv*(V(InvIN)-VCCinv/2)+VCCinv/2, 0, VCCinv)
SYMBOL res 256 32 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R302
SYMATTR Value 100k
SYMATTR SpiceLine ""
SYMBOL res 432 32 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R303
SYMATTR Value 100
SYMATTR SpiceLine ""
SYMBOL res 448 80 R0
SYMATTR InstName R304
SYMATTR Value 1k
SYMATTR SpiceLine ""
SYMBOL cap 544 96 R0
SYMATTR InstName C326
SYMATTR Value 33p
SYMATTR SpiceLine ""
TEXT 80 -72 Left 2 !.tran 0 500u 499.8u uic
TEXT 80 -48 Left 2 !.param VCCosc=3.3, fosc=12Meg, trf=3n
TEXT 80 -24 Left 2 !.param VCCinv=1.8, Ainv=-10