www.ti.com

SN74ALVCH16646

16-BIT BUS TRANSCEIVER AND REGISTER

WITH 3-STATE OUTPUTS

SCES032F – JULY 1995 – REVISED SEPTEMBER 2004

FUNCTION TABLE

INPUTS

DATA I/Os

OPERATION OR FUNCTION

OE

DIR

CLKAB

CLKBA

SAB

SBA

A1–A8

B1–B8

X

X

↑

X

X

X

Input

X

X

X

↑

X

X

Input

H

X

↑

↑

X

X

Input

Input

Store A and B data

H

X

H or L

H or L

X

X

Input disabled

Input disabled

Isolation, hold storage

L

L

X

X

X

L

Output

Input

Real-time B data to A bus

L

L

X

H or L

X

H

Output

Input

Stored B data to A bus

L

H

X

X

L

X

Input

Output

Real-time A data to B bus

L

H

H or L

X

H

X

Input

Output

Stored A data to B bus

(1)

The data-output functions may be enabled or disabled by various signals at OE and DIR. Data-input functions always are enabled; i.e.,

data at the bus terminals is stored on every low-to-high transition of the clock inputs.

2