鈥?/div>
54ACTQ245
Quiet Series Octal Bidirectional Transceiver with
TRI-STATE
廬
Inputs/Outputs
General Description
The 鈥橝CQ/鈥橝CTQ245 contains eight non-inverting bidirec-
tional buffers with TRI-STATE outputs and is intended for
bus-oriented applications. Current sinking capability is
24 mA at both the A and B ports. The Transmit/Receive (T/R)
input determines the direction of data flow through the bidi-
rectional transceiver. Transmit (active-HIGH) enables data
from A ports to B ports; Receive (active-LOW) enables data
from B ports to A ports. The Output Enable input, when
HIGH, disables both A and B ports by placing them in a HIGH
Z condition.
The 鈥橝CQ/鈥橝CTQ utilizes NSC Quiet Series technology to
guarantee quiet output switching and improve dynamic
threshold performance. FACT Quiet Series
鈩?/div>
features
GTO
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output control and undershoot corrector in addition to
a split ground bus for superior performance.
Features
n
I
CC
and I
OZ
reduced by 50%
n
Guaranteed simultaneous switching noise level and
dynamic threshold performance
n
Improved latch-up immunity
n
TRI-STATE outputs drive bus lines or buffer memory
address registers
n
Outputs source/sink 24 mA
n
Faster prop delays than the standard 鈥橝CT245
n
4 kV minimum ESD immunity (鈥橝CQ)
n
Standard Military Drawing (SMD)
鈥?鈥橝CTQ245: 5962-92187
鈥?鈥橝CQ245: 5962-92177
Logic Symbols
IEEE/IEC
DS100237-1
DS100237-2
Pin
Names
OE
T/R
A
0
鈥揂
7
B
0
鈥揃
7
Output Enable Input
Description
Transmit/Receive Input
Side A TRI-STATE Inputs or TRI-STATE Outputs
Side B TRI-STATE Inputs or TRI-STATE Outputs
GTO
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is a trademark of National Semiconductor Corporation.
TRI-STATE
廬
is a registered trademark of National Semiconductor Corporation.
FACT
廬
is a registered trademark of Fairchild Semiconductor Corporation.
FACT Quiet Series
鈩?/div>
is a trademark of Fairchild Semiconductor Corporation.
漏 1998 National Semiconductor Corporation
DS100237
www.national.com
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