SN74LVCH32245A

32-BIT BUS TRANSCEIVER

WITH 3-STATE OUTPUTS

SCAS616A – OCTOBER 1998 – REVISED JUNE 1999

1

POST OFFICE BOX 655303

Widebus

™ Family

CMOS) Submicron Process

Operation

All Ports (5-V Input/Output Voltage With

Need for External Pullup/Pulldown

Resistors

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

JESD 78, Class II

Array Package

description

The SN74LVCH32245A is designed for asynchronous communication between data buses. The

control-function implementation minimizes external timing requirements.

This device can be used as four 8-bit transceivers, two 16-bit transceivers, or one 32-bit transceiver. It allows

data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at

the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so that the

buses are effectively isolated.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators

in a mixed 3.3-V/5-V system environment.

preventing damaging current backflow through the device when it is powered down.

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

The SN74LVCH32245A is characterized for operation from –40

°C to 85°C.

FUNCTION TABLE

(each 8-bit section)

INPUTS

OPERATION

OE

DIR

OPERATION

L

L

B data to A bus

L

H

A data to B bus

H

X

Isolation

Copyright

© 1999, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

EPIC and Widebus are trademarks of Texas Instruments Incorporated.