100323

Low Power Hex Bus Driver

General Description

The 100323 is a monolithic device containing six bus drivers

capable of driving terminated lines with terminations as low

as 25

Ω. To reduce crosstalk, each output has its own re-

spective ground connection. Transition times were designed

to be longer than on other F100K devices. The driver itself

performs the positive logic AND of a data input (D

the OR of two select inputs (E and either DE

Enabling of data is possible in multiples of two, i.e., 2, 4 or all

6 paths. All inputs have 50 k

Ω pull-down resistors.

The output voltage LOW level is designed to be more nega-

tive than normal ECL outputs (cut off state). This allows an

emitter-follower output transistor to turn off when the termi-

nation supply is −2.0V and thus present a high impedance to

the data bus.

Features

n 50% power reduction of the 100123

n 2000V ESD protection

n −4.2V to −5.7V operating range

n Drives 25

Ω load

Logic Symbol

Pin Names

Description

D

Data Inputs

DE

Dual Enable Inputs

E

Common Enable Input

O

Data Outputs

DS100312-7

August 1998

© 1998 National Semiconductor Corporation

DS100312

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