54ACT16543, 74ACT16543

16-BIT REGISTERED TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCAS126B – MARCH 1990 – REVISED APRIL 1996

2

POST OFFICE BOX 655303

FUNCTION TABLE

(each octal register)

INPUTS

LATCH

STATUS

OUTPUT

BUFFERS

CEAB

LEAB

OEAB

STATUS

A TO B†

BUFFERS

B1–B8

H

X

X

Storing

Z

X

H

X

Storing

X

XH

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 that

it uses CEBA, LEBA, and OEBA.

‡ Data present before low-to-high transition of LEAB occurring while

CEAB is low