SN74LVC16543

16-BIT REGISTERED TRANSCEIVER

WITH 3-STATE OUTPUTS

SCAS317A – NOVEMBER 1993 – REVISED OCTOBER 1995

1

POST OFFICE BOX 655303

Widebus

™ Family

CMOS) Submicron Process

Per JEDEC Standard JESD-17

Need for External Pullup/Pulldown

Resistors

Shrink Small-Outline (DL) and Thin Shrink

Small-Outline (DGG) Packages

description

This 16-bit registered transceiver is designed for

The SN74LVC16543 can be used as two 8-bit

transceivers or one 16-bit transceiver. 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 in

order 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 puts 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 from B to

A is similar but requires using the CEBA, LEBA, and OEBA inputs.

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 SN74LVC16543 is characterized for operation from – 40

°C to 85°C.

Copyright

© 1995, 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.

EPIC and Widebus are trademarks of Texas Instruments Incorporated.

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.

DGG OR DL PACKAGE

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1OEAB

1LEAB

1CEAB

GND

1A1

1A2

1A3

1A4

1A5

GND

1A6

1A7

1A8

2A1

2A2

2A3

GND

2A4

2A5

2A6

2A7

2A8

GND

2CEAB

2LEAB

2OEAB

1OEBA

1LEBA

1CEBA

GND

1B1

1B2

1B3

1B4

1B5

GND

1B6

1B7

1B8

2B1

2B2

2B3

GND

2B4

2B5

2B6

2B7

2B8

GND

2CEBA

2LEBA

2OEBA