HEF4044BT datasheet(2/5 Pages) PHILIPS

Part #	HEF4044BT

Description	Quadruple R/S latch with 3-state outputs

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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2 / 5 page

January 1995

2

Philips Semiconductors

Product speciﬁcation

Quadruple R/S latch with 3-state outputs

HEF4044B

MSI

The HEF4044B is a quadruple R/S latch with 3-state

outputs with a common output enable input (EO). Each

latch has an active LOW set input (S0 to S3), an active

LOW reset input (R0 to R3) and an active HIGH 3-state

output (O0 to O3).

When EO is HIGH, the state of the latch output (On) can be

determined from the function table below. When EO is

LOW, the latch outputs are in the high impedance

OFF-state. EO does not affect the state of the latch.

The high impedance off-state feature allows common

busing of the outputs.

Fig.1 Functional diagram.

PINNING

FUNCTION TABLE

Notes

1. H = HIGH state (the more positive voltage)

L = LOW state (the less positive voltage)

X = state immaterial

Z = high impedance OFF-state

FAMILY DATA, IDD LIMITS category MSI

See Family Specifications

HEF4044BP(N): 16-lead DIL; plastic (SOT38-1)

HEF4044BD(F):

16-lead DIL; ceramic (cerdip) (SOT74)

HEF4044BT(D):

16-lead SO; plastic (SOT109-1)

( ): Package Designator North America

EO

common output enable input

S0 to S3

set inputs (active LOW)

R0 to R3

reset inputs (active LOW)

O0 to O3

3-state buffered latch outputs

INPUTS

OUTPUT

On

EO

Sn

Rn

LX

X

Z

HL

H

HX

L

H

latched

Fig.2 Pinning diagram.

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HEF4044BT Datasheet(PDF) 2 Page - NXP Semiconductors

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