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(OE stripped tag previously, sorry)

John, if it helps, the circuit attached is stable, to about 2%, over the Vcc
range of the IC, say 3V to 15V. I use this one as the back-plane driver
for an LCD, obviously you would change R and C to suit. You can add
an R and D (anode towards C) across the 33k to get other than 50%


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