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 25Ω. 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
1
–D
6
) and
the OR of two select inputs (E and either DE
1
,DE
2
,orDE
3
).
Enabling of data is possible in multiples of two, i.e., 2, 4 or all
6 paths. All inputs have 50 kΩ 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 25Ω load
Logic Symbol
Pin Names Description
D
1
–D
6
Data Inputs
DE
1
–DE
3
Dual Enable Inputs
E Common Enable Input
O
1
–O
6
Data Outputs
DS100312-7
August 1998
100323
Low
Power
Hex
Bus
Driver
© 1998 National Semiconductor Corporation DS100312 www.national.com