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40102 - Presettable 2-decade BCD synchromous down counter

pinout

1 CLK 16 Vcc 2 CLR 15 SPE 3 CE 14 ZO 4 U0 13 T3 5 U1 12 T2 6 U2 11 T1 7 U3 10 T0 8 GND 9 APE 40102 www.nanobob.com

symbol

13 T3 14 ZO 12 T2 11 T1 10 T0 1 CLK 7 U3 2 CLR 6 U2 3 CE 5 U1 15 SPE 4 U0 9 APE

description

Un : units digit

Tn : tens digit

CE : counter enable

SPE : synchronous preset enable

ZO : zero output

APE : asynchronous preset enable

pin types

0 digital input 0 digital output 0 digital input-output (bidir) 0 analog (input or output) 0 positive power 0 ground 0 negative power