TLF8795

February 1996

DP8308 8-Bit TRI-STATE

Bidirectional Transceiver (Non-Inverting)

General Description

The DP8308 is a high speed Schottky 8-bit TRI-STATE bidi-

rectional transceiver designed to provide bidirectional drive

for bus oriented microprocessor and digital communications

systems It is capable of sinking 16 mA on the A ports and

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

patibility with MOS CMOS and other technologies that

have a higher threshold and less drive capabilities In addi-

tion it features glitch-free power updown on the B port

preventing erroneous glitches on the system bus in power

up or down

DP8308 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 voltage 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

TLF8795 – 1

Dual-In-Line Package

TLF8795 – 2

Top View

Order Number DP8308N

See NS Package Number N20A

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

TRI-STATE

is a registered trademark of National Semiconductor Corp

C1996 National Semiconductor Corporation

RRD-B30M36Printed in U S A

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