100344F datasheet(1/8 Pages) NSC

Part #	100344F

Description	Low Power 8-Bit Latch with Cut-Off Drivers

PDF	8 Pages

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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100344

Low Power 8-Bit Latch with Cut-Off Drivers

General Description

The 100344 contains eight D-type latches, individual inputs

(D

n), outputs (Qn), a common enable pin (E), latch enable

(LE), and output enable pin (OEN). A Q output follows its D

input when both E and LE are LOW. When either E or LE (or

both) are HIGH, a latch stores the last valid data present on

its D input prior to E or LE going HIGH.

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 re-

duces termination power and prevents loss of low state

noise margin when several loads share the bus.

The 100344 outputs are designed to drive a doubly termi-

nated 50

Ω transmission line (25Ω load impedance). All in-

puts have 50 k

Ω pull-down resistors.

Features

n Cut-off drivers

n Drives 25

Ω load

n Low power operation

n 2000V ESD protection

n Voltage compensated operating range = −4.2V to −5.7V

n Available to MIL-STD-883

Logic Symbol

Pin Names

Description

D

0–D7

Data Inputs

E

Enable Input

LE

Latch Enable Input

OEN

Output Enable Input

Q

0–Q7

Data Outputs

Connection Diagrams

DS100317-4

24-Pin DIP

DS100317-1

24-Pin Quad Cerpak

DS100317-2

August 1998

DS100317

www.national.com

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100344F Datasheet(PDF) 1 Page - National Semiconductor (TI)

100344F Datasheet(HTML) 1 Page - National Semiconductor (TI)

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