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FEATURES

DB, DW, OR PW PACKAGE

(TOP VIEW)

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LEBA

OEBA

A1

A2

A3

A4

A5

A6

A7

A8

CEAB

GND

CEBA

B1

B2

B3

B4

B5

B6

B7

B8

LEAB

OEAB

DESCRIPTION/ORDERING INFORMATION

SN74LVC543A

OCTAL REGISTERED TRANSCEIVER

WITH 3-STATE OUTPUTS

SCAS299H – JANUARY 1993 – REVISED MARCH 2005

•

Operates From 1.65 V to 3.6 V

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Inputs Accept Voltages to 5.5 V

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•

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Supports Mixed-Mode Signal Operation on All

Ports (5-V Input/Output Voltage With

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Operation

•

Latch-Up Performance Exceeds 250 mA Per

JESD 17

The SN74LVC543A contains two sets of D-type latches for temporary storage of data flowing in either direction.

Separate latch-enable (LEAB or LEBA) and output-enable (OEAB or OEBA) inputs are provided for each register

to permit independent control in either direction of data flow.

The A-to-B enable (CEAB) input must be low to enter data from A or to output data from B. If CEAB is low and

LEAB is low, the A-to-B latches are transparent; a subsequent low-to-high transition of LEAB places the A

latches in the storage mode. With CEAB and OEAB both low, the 3-state B outputs are active and reflect the

data present at the output of the A latches. Data flow for B to A is similar to that of A to B, but uses CEBA, LEBA,

and OEBA.

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.

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.

ORDERING INFORMATION

ORDERABLE PART NUMBER

TOP-SIDE MARKING

Tube of 25

SN74LVC543ADW

SOIC – DW

LVC543A

Reel of 2000

SN74LVC543ADWR

SSOP – DB

Reel of 2000

SN74LVC543ADBR

LC543A

–40

°C to 85°C

Tube of 60

SN74LVC543APW

TSSOP – PW

Reel of 2000

SN74LVC543APWR

LC543A

Reel of 250

SN74LVC543APWT

(1)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 1993–2005, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.