December 1990

13

Philips Semiconductors

Product specification

Presettable synchronous BCD decade

up/down counter

74HC/HCT190

PACKAGE OUTLINES

See

The shaded areas indicate when the input is

permitted to change for predictable output

performance.

Fig.17 Waveforms showing the set-up and hold times from the count enable and up/down inputs (CE, U/D) to the

clock (CP).

The shaded areas indicate when the input is

permitted to change for predictable output

performance.