MC14553 Datasheet (Motorola) - 3-Digit BCD Counter

MC14553, 3-Digit BCD Counter

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC14553B 3-Digit BCD Counter The MC14553B 3 digit BCD counter consists of 3 negative edge triggered BCD counters that are cascaded synchronously.

A quad latch at the output of each counter permits storage of any given count.

The information is then time division multiplexed, providing one BCD number or digit at a time.

Digit select outputs provide display control.

All outputs are TTL compatible.

An on chip oscillator provides the low

MC14553 Features

* cy scanning clock which drives the multiplexer output selector. The frequency of the oscillator can be controlled externally by a capacitor between pins 3 and 4, or it can be overridden and driven with an external clock at pin 4. Multiple devices can be cascaded using the overflow output, which prov