Philips hef40240b DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

For a complete data sheet, please also download:

•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC

•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC

HEF40240B
buffers

Octal inverting buffers with 3-state
outputs

Product specification
File under Integrated Circuits, IC04

January 1995

Philips Semiconductors Product specification

Octal inverting buffers with 3-state outputs

DESCRIPTION

The HEF40240B is an octal inverting buffer with 3-state
outputs. It features output stages with high current output
capability suitable for driving highly capacitive loads.

The 3-state outputs are controlled by the output enable
inputsEOAandEOB. A HIGH onEO causes the outputs to
assume a high impedance OFF-state. The device also
features hysteresis on all inputs to improve noise
immunity.
Schmitt-trigger action in the inputs makes the circuit highly
tolerant to slower input rise and fall times.

The HEF40240B is pin and functionally compatible with
the TTL ‘240’ device.

HEF40240B

buffers

Fig.1 Functional diagram.

Fig.2 Pinning diagram.

HEF40240BP(N): 20-lead DIL; plastic (SOT146-1)
HEF40240BD(F): 20-lead DIL; ceramic (cerdip) (SOT152)
HEF40240BT(D): 20-lead SO; plastic (SOT163-1)
( ): Package Designator North America

PINNING

I

to I

A1

A4

to I

I

B1

B4

O

to O

A1

O

to O

B1

EOA, EO

A4
B4

B

inputs
inputs
bus outputs
bus outputs
output enable inputs (active LOW)

FAMILY DATA, IDDLIMITS category buffers

See Family Specifications

January 1995 2