© 2001 Fairchild Semiconductor Corporation

DS011998

www.fairchildsemi.com

February 1994

Revised March 2001

74LCX652

Low Voltage Transceiver/Register

with 5V Tolerant Inputs and Outputs

General Description

The LCX652 consists of bus transceiver circuits with D-

type flip-flops, and control circuitry arranged for multiplexed

transmission of data directly from the input bus or from

internal registers. Data on the A or B bus will be clocked

into the registers as the appropriate clock pin goes to the

HIGH logic level. Output Enable pins (OEAB, OEBA) are

provided to control the transceiver function.

applications with capability of interfacing to a 5V signal

environment.

The LCX652 is fabricated with an advanced CMOS tech-

nology to achieve high speed operation while maintaining

CMOS low power dissipation.

Features

■ 5V tolerant inputs and outputs

■ 2.3V

− 3.6V V

■ Power down high impedance inputs and outputs

■ Supports live insertion/withdrawal (Note 1)

■

±24 mA output drive (V

■ Implements patented noise/EMI reduction circuitry

■ Latch-up performance exceeds 500 mA

■ ESD performance:

Human body model

> 2000V

Machine model

> 200V

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

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

Ordering Code:

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

Connection Diagram

Pin Descriptions

Order Number

Package Number

Package Description

74LCX652WM

M24B

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

74LCX652MSA

MSA24

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

74LCX652MTC

MTC24

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

Pin Names

Description

A and B Inputs/3-STATE Outputs

CPAB, CPBA

Clock Inputs

SAB, SBA

Select Inputs

OEAB, OEBA

Output Enable Inputs