HEF4737VP Просмотр технического описания (PDF) - Philips Electronics

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HEF4737VP

Quadruple static decade counters

Philips Electronics 

Philips Semiconductors

Quadruple static decade counters

Product specification

HEF4737B

HEF4737V

Fig.2 Block diagram.

FUNCTIONAL DESCRIPTION

Input signals

Count input (CP)

The signal to be counted is applied to this input. When PL

and MR are LOW the contents of the counter increments

by one at a LOW to HIGH transition of CP.

Reset input (MR)

This is an asynchronous reset. A HIGH level applied to this

input will reset the counter to zero independent of the level

at the count input and preset input.

Preset input (PL)

This is an asynchronous preset. When MR is LOW a HIGH

at the PL input will preset the counter to 19 999

independent of the level at the count input.

Transfer input (T)

A HIGH level applied to this input allows the information

held by the counter to pass to the latches.

Output enable input (EO)

A HIGH level at this input enables the BCD outputs and

information can be read out of the latches using the

January 1995

3

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