TLF8794

February 1996

DP8307A 8-Bit TRI-STATE

Bidirectional Transceiver (Inverting)

General Description

The DP8307A is a high speed Schottky 8-bit TRI-STATE

bidirectional transceiver designed to provide bidirectional

drive for bus oriented microprocessor and digital communi-

cations systems It is capable of sinking 16 mA on the A

ports and 48 mA on the B ports (bus ports) PNP inputs for

allow compatibility with MOS CMOS and other technolo-

gies that have a higher threshold and less drive capabilities

In addition it features glitch-free power updown on the B

port preventing erroneous glitches on the system bus in

power up or down

DP8303A and DP7304BDP8304B are featured with Trans-

mitReceive (TR) and Chip Disable (CD) inputs to simplify

control logic For greater design flexibility DP8307A and

DP7308DP8308

is

featured

with

Transmit

(T)

and

Receive (R) control inputs

Features

Y

8-bit bidirectional data flow reduces system package

count

Y

Bidirectional TRI-STATE inputsoutputs interface with

bus oriented systems

Y

PNP inputs reduce input loading

Y

Output high votlage interfaces with TTL

MOS

and

CMOS

Y

48 mA300 pF bus drive capability

Y

Pinouts simplify system interconnections

Y

Independent T and R controls for versatility

Y

Compact 20-pin dual-in-line package

Y

Bus port glitch free power updown

Logic and Connection Diagrams

TLF8794 – 1

Logic Table

Control Inputs

Resulting Conditions

Transmit

Receive

A Port

B Port

1

0

OUT

IN

0

1

IN

OUT

1

1

TRI-STATE

TRI-STATE

0

0

Both Active

This is not an intended logic condition and may cause oscillations

Dual-In-Line Package

TLF8794 – 2

Top View

Order Number DP8307AN

See NS Package Number N20A

TRI-STATE

is a registered trademark of National Semiconductor Corporation

C1996 National Semiconductor Corporation

RRD-B30M36Printed in U S A

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