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HEC4531BP

13-input parity checker/generator

Philips Electronics 

Philips Semiconductors

13-input parity checker/generator

DESCRIPTION

The HEF4531B is a parity checker/generator with 13 parity

inputs (I0 to I12) and a parity output (O). When the number

of parity inputs that are HIGH is even, the output is LOW.

When the number of parity inputs that are HIGH is odd, the

output is HIGH. For words of 12 bits or less, the output can

be used to generate either odd or even parity by

appropriate termination of the unused parity input(s). For

words of 14 or more bits, the devices can be cascaded by

connecting the output of one device to any parity input of

another device. When cascading devices, it is

recommended that the output of one device be connected

to the I12 input of the other device since there is less delay

to the output from the I12 input than from any other input

(I0 to I11).

Product specification

HEF4531B

MSI

Fig.1 Functional diagram.

Fig.2 Pinning diagram.

HEF4531BP(N): 16-lead DIL; plastic

(SOT38-1)

HEF4531BD(F): 16-lead DIL; ceramic (cerdip)

(SOT74)

HEF4531BT(D): 16-lead SO; plastic

(SOT109-1)

( ): Package Designator North America

FAMILY DATA, IDD LIMITS category MSI

See Family Specifications

January 1995

2

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