Fairchild Semiconductor 100323QCX, 100323QC, 100323PC, 100323CW Datasheet

© 2000 Fairchild Semiconductor Corporation DS009877 www.fairchildsemi.com

July 1988
Revised August 2000

100323 Low Power Hex Bus Driver

100323
Low Power Hex Bus Driver

General Description

The 100323 is a mo nolithic d evice contain ing six bu s driv­ers capable of driving ter min ate d li nes wit h ter min ati on s as
low as 25

Ω. To reduce crosstalk, each output has its own

respective ground connection. Transition times were
designed to be longer than on other F100K d evices. The
driver itself performs the pos itive log ic AND of a dat a input
(D

1–D6

) and the OR of two select inputs (E and either DE1,

DE

2

, or DE3).

Enabling of data is possi ble in mu ltiples 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 design ed to be more ne g­ative than normal ECL output s (cut off state). This allows
an emitter-follower output tra nsistor to turn OFF when the
termination supply is

−2.0V and thus present a high imped-

ance to the data bus.

Features

■ 50% power reduction of the 100123

■ 2000V ESD protection

■

−4.2V to −5.7V operating range

■ Drives 25

Ω load

Ordering Code:

Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.

Logic Symbol

Pin Descriptions

Connection Diagrams

24-Pin DIP

28-Pin PLCC

Order Number Package Number Package Description

100323PC N24E 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.400 Wide
100323QC V28A 28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square

Pin Names Description

D

1–D6

Data Inputs

DE

1

–DE

3

Dual Enable Inputs
E Common Enable Input
O

1–O6

Data Outputs

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100323

Truth Table

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

Logic Diagram

EDEnD

n

D

n+1

O

n

O

n+1

L L X X Cutoff Cutoff
X H L L Cutoff Cutoff
XH L H Cutoff H
X H H L H Cutoff
XH H H H H
H X L L Cutoff Cutoff
HX L H Cutoff H
H X H L H Cutoff
HX H H H H