SN74LVC543A

OCTAL REGISTERED TRANSCEIVER

WITH 3-STATE OUTPUTS

SCAS299F – JANUARY 1993 – REVISED JUNE 1998

1

POST OFFICE BOX 655303

CMOS) Submicron Process

Live Insertion

All Ports (5-V Input/Output Voltage With

JESD 17

Small-Outline (DW), Shrink Small-Outline

(DB), and Thin Shrink Small-Outline (PW)

Packages

description

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.

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.

The SN74LVC543A is characterized for operation from –40

°C to 85°C.

Copyright

© 1998, 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 is a trademark of Texas Instruments Incorporated.

DB, DW, OR PW PACKAGE

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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