tm

June 2007

©1984 Fairchild Semiconductor Corporation

www.fairchildsemi.com

MM74HCT540, MM74HCT541 Rev. 1.3

MM74HCT540, Inverting Octal 3-STATE Buffer

MM74HCT541, Octal 3-STATE Buffer

Features

General Description

The MM74HCT540 and MM74HCT541 3-STATE buffers

utilize advanced silicon-gate CMOS technology and are

general purpose high speed inverting and non-inverting

buffers. They possess high drive current outputs which

enable high speed operation even when driving large

bus capacitances. These circuits achieve speeds com-

parable to low power Schottky devices, while retaining

the low power consumption of CMOS. Both devices are

TTL input compatible and have a fanout of 15 LS-TTL

equivalent inputs.

MM74HCT devices are intended to interface between

TTL and NMOS components and standard CMOS

devices. These parts are also plug-in replacements for

LS-TTL devices and can be used to reduce power con-

sumption in existing designs.

The MM74HCT540 is an inverting buffer and the

MM74HCT541 is a non-inverting buffer. The 3-STATE

control gate operates as a two-input NOR such that if

either G1 or G2 are HIGH, all eight outputs are in the

high-impedance state.

In order to enhance PC board layout, the MM74HCT540

and MM74HCT541 offers a pinout having inputs and

outputs on opposite sides of the package. All inputs are

protected from damage due to static discharge by diodes

Ordering Information

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering number.

Order Number

Package

Number

Package Description

MM74HCT540WM

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

MM74HCT540SJ

M20D

20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

MM74HCT540MTC

MTC20

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm

Wide

MM74HCT541WM

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

MM74HCT541SJ

M20D

20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

MM74HCT541MTC

MTC20

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm

Wide

MM74HCT541N

N20A

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide