SN74LVT245B

3.3V ABT OCTAL BUS TRANSCEIVER

WITH 3STATE OUTPUTS

SCES004H − JANUARY 1995 − REVISED SEPTEMBER 2003

2

POST OFFICE BOX 655303

description/ordering information (continued)

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

disables the outputs, preventing damaging current backflow through the device when it is powered down. The

power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,

which prevents driver conflict.

terminal assignments

1234

A

A1

DIR

VCC

OE

B

A3

B2

A2

B1

C

A5

A4

B4

B3

D

A7

B6

A6

B5

E

GND

A8

B8

B7

FUNCTION TABLE

INPUTS

OPERATION

OE

DIR

OPERATION

L

L

B data to A bus

L

H

A data to B bus

H

X

Isolation

logic diagram (positive logic)

DIR

OE

A1

B1

To Seven Other Channels

1

2

19

18

Pin numbers shown are for the DB, DW, NS, PW, and RGY packages.

GQN OR ZQN PACKAGE

(TOP VIEW)

1

234

A

B

C

D

E