Version 4
SHEET 1 2328 1460
WIRE -96 1056 -96 1008
WIRE -96 1200 -96 1136
WIRE -80 784 -80 736
WIRE -80 896 -80 864
WIRE -80 928 -80 896
WIRE -64 1008 -96 1008
WIRE -48 736 -80 736
WIRE 32 736 -48 736
WIRE 288 736 112 736
WIRE 288 800 288 736
WIRE 336 800 288 800
WIRE 336 896 -80 896
WIRE 400 560 400 528
WIRE 400 672 400 640
WIRE 432 528 400 528
WIRE 496 528 432 528
WIRE 496 752 496 528
WIRE 576 784 560 784
WIRE 592 896 560 896
WIRE 592 928 592 896
WIRE 656 528 496 528
WIRE 656 608 656 528
WIRE 656 816 560 816
WIRE 656 816 656 688
WIRE 704 816 656 816
WIRE 720 816 704 816
FLAG 400 672 0
FLAG 592 928 0
FLAG 432 528 vcc
FLAG -80 928 0
FLAG -48 736 in
FLAG 704 816 out
FLAG -96 1200 0
FLAG -64 1008 ena
FLAG 576 784 ena
SYMBOL voltage 400 544 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 16 752 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R1
SYMATTR Value 330
SYMBOL voltage -80 768 R0
WINDOW 3 20 102 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 5 0 5n 5n 0.5u 1u)
SYMATTR InstName V2
SYMBOL res 640 592 R0
SYMATTR InstName R2
SYMATTR Value 330
SYMBOL voltage -96 1040 R0
WINDOW 3 20 102 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(5 0 150n 5n 5n 0.15u 10u)
SYMATTR InstName V3
SYMBOL 6n137 432 848 R0
SYMATTR InstName U1
TEXT -88 488 Left 0 !.tran 1u
TEXT -88 568 Left 0 !.op
TEXT -88 528 Left 0 !.TEMP 27
TEXT 112 488 Left 0 ;Functional Test
TEXT -88 608 Left 0 !.include 6n137.sub