NSC 100352FMQB, 100352DMQB Datasheet

100352
Low Power 8-Bit Buffer with Cut-Off Drivers

General Description

The 100352 contains an 8-bit buffer, individual inputs (Dn),
outputs (Qn), and a data output enable pin (OEN). A Q out­put follows its D input when the OEN pin is LOW. A HIGH on
OEN holds the outputs in a cut-off state. The cut-off state is
designed to be more negative than a normal ECL LOW level.
This allows the output emitter-followers to turn off when the
termination supply is −2.0V, presenting a high impedance to
the data bus. This high impedance reduces termination
power and prevents loss of lowstatenoisemarginwhensev­eral loads share the bus.

The 100352 outputs are designed to drive a doubly termi­nated 50Ω transmission line (25Ω load impedance). All in­puts have 50 kΩ pull-down resistors.

Features

n Cut-off drivers
n Drives 25Ω load
n Low power operation
n 2000V ESD protection
n Voltage compensated operating range=−4.2V to −5.7V
n Available to industrial grade temperature range
n Available to MIL-STD-883

Logic Symbol

Pin Names Description

D

0–D7

Data Inputs

OEN

Output Enable Input

Q

0–Q7

Data Outputs

NC No Connect

DS100296-1

August 1998

100352 Low Power 8-Bit Buffer with Cut-Off Drivers

© 1998 National Semiconductor Corporation DS100296 www.national.com

Connection Diagrams

24-Pin DIP

DS100296-2

24-Pin Quad Cerpak

DS100296-3

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Logic Diagram

Truth Table

Inputs Outputs

Dn OEN

Qn

LL L
HL H
X H Cutoff

H=HIGH Voltage Level
L=LOW Voltage Level
Cutoff=Lower-than-LOW State
X=Don’t Care

DS100296-5

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