100352 Low Power 8-Bit Buffer with Cut-Off Drivers
August 1998
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 out-
put 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 low state noise margin when sev-
eral loads share the bus.
The 100352 outputs are designed to drive a doubly termi-
nated 50Ω transmission line (25Ω load impedance). All in-
puts have 50 kΩ pull-down resistors.
Features
n
n
n
n
n
n
n
Cut-off drivers
Drives 25Ω load
Low power operation
2000V ESD protection
Voltage compensated operating range = −4.2V to −5.7V
Available to industrial grade temperature range
Available to MIL-STD-883
Logic Symbol
DS100296-1
Pin Names
D
0
–D
7
OEN
Q
0
–Q
7
NC
Description
Data Inputs
Output Enable Input
Data Outputs
No Connect
© 1998 National Semiconductor Corporation
DS100296
www.national.com
NSC [ NATIONAL SEMICONDUCTOR ]
