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74LCX540CW

Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs

Fairchild Semiconductor 

March 1995

Revised April 1999

74LCX540

Low Voltage Octal Buffer/Line Driver with 5V Tolerant

Inputs and Outputs

General Description

The LCX540 is an octal buffer/line driver designed to be

employed as a memory and address driver, clock driver

and bus oriented transmitter/receiver.

This device is similar in function to the LCX240 while pro-

viding flow-through architecture (inputs on opposite side

from outputs). This pinout arrangement makes this device

especially useful as an output port for microprocessors,

allowing ease of layout and greater PC board density.

The LCX540 is designed for low voltage (2.5V or 3.3V) VCC

applications with capability of interfacing to a 5V signal

environment. The LCX540 is fabricated with an advanced

CMOS technology to achieve high speed operation while

maintaining CMOS low power dissipation.

Features

s 5V tolerant inputs and outputs

s 2.3V–3.6V VCC specifications provided

s 6.5 ns tPD max (VCC = 3.3V), 10 µA ICC max

s Power down high impedance inputs and outputs

s Supports live insertion/withdrawal (Note 1)

s Implements patented noise/EMI reduction circuitry

s Latch-up performance exceeds 500 mA

s ESD performance:

Human body model > 2000V

Machine model > 200V

Note 1: To ensure the high-impedance state during power up or down, OE

should be tied to VCC through a pull-up resistor: the minimum value or the

resistor is determined by the current-sourcing capability of the driver.

Ordering Code:

Order Number Package Number

Package Description

74LCX540WM

M20B

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

74LCX540SJ

M20D

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

74LCX540MSA

MSA20

20-Lead Shrink Small Outline Package (SSOP), TYPE II, 5.3mm Wide

74LCX540MTC

MTC20

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

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

Logic Symbol

Connection Diagram

IEEE/IEC

© 1999 Fairchild Semiconductor Corporation DS012403.prf

www.fairchildsemi.com

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