SN74FB1650

18BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER

SCBS178O − AUGUST 1992 − REVISED MARCH 2004

2

POST OFFICE BOX 655303

description/ordering information

The SN74FB1650 contains two 9-bit transceivers designed to translate signals between TTL and backplane

transceiver-logic (BTL) environments. The device is designed specifically to be compatible with

IEEE Std 1194.1-1991.

The B port operates at BTL-signal levels. The open-collector B ports are specified to sink 100 mA. Two output

the B port is turned off.

The A port operates at TTL-signal levels. The A outputs reflect the inverse of the data at the B port when the

high-impedance state.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

0

°C to 70°C

TQFP − PCA

Tube

SN74FB1650PCA

FB1650

† Package drawings, standard packing quantities, thermal data, symbolization, and

PCB design guidelines are available at www.ti.com/sc/package.

Function Tables

TRANSCEIVER

INPUTS

FUNCTION

OEA

OEA

OEB

OEB

FUNCTION

X

X

H

L

A data to B bus

L

HX

X

B data to A bus

L

HH

L

A data to B bus, B data to A bus

X

X

L

X

B-bus isolation

X

XX

H

B-bus isolation

H

X

X

X

A-bus isolation

X

L

X

X

A-bus isolation

STORAGE MODE

INPUTS

FUNCTION

LE

CLK

FUNCTION

H

X

Transparent

L

↑

Store data

L

L

Storage