74ACT11543

OCTAL REGISTERED TRANSCEIVER

WITH 3-STATE OUTPUTS

SCAS136 – D3608, JULY 1990 – REVISED APRIL 1993

POST OFFICE BOX 655303

Copyright

2–1

PCB Layout

Minimize High-Speed Switching Noise

CMOS) 1-

mm Process

description

This 8-bit registered transceiver 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 (GAB or GBA)

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 to B. Having CEAB

low and LEAB low makes the A-to-B latches transparent; a subsequent low-to-high transition of LEAB puts the

A latches in the storage mode. With CEAB and GAB 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 the use of CEBA, LEBA,

and GBA inputs.

The 74ACT11543 is characterized for operation from – 40

°C to 85°C.

FUNCTION TABLE

INPUTS

LATCH

STATUS

OUTPUT BUFFERS

CEAB

LEAB

GAB

STATUS

A TO B†

B1 THRU B8

H

X

X

Storing

Z

X

H

Storing

X

H

Z

L

L

L

Transparent

Current A Data

L

H

L

Storing

Previous} A Data

† A-to-B data flow is shown: B-to-A flow control is the same except uses

CEBA, LEBA, and GBA.

‡ Data present before low-to-high transition of LEAB.

DW PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

CEBA

A1

A2

A3

A4

GND

GND

GND

GND

A5

A6

A7

A8

CEAB

GBA

LEBA

B1

B2

B3

B4

B5

B6

B7

B8

LEAB

GAB

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 is a trademark of Texas Instruments Incorporated.