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54ACTQ245L Scheda tecnica(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte 54ACTQ245L
Spiegazioni elettronici  Quiet Series Octal Bidirectional Transceiver with TRI-STATE Inputs/Outputs
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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54ACTQ245L Scheda tecnica(HTML) 1 Page - National Semiconductor (TI)

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54ACQ245
54ACTQ245
Quiet Series Octal Bidirectional Transceiver with
TRI-STATE® Inputs/Outputs
General Description
The ’ACQ/’ACTQ245 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 ’ACQ/’ACTQ utilizes NSC Quiet Series technology to
guarantee quiet output switching and improve dynamic
threshold performance. FACT Quiet Seriesfeatures
GTOoutput control and undershoot corrector in addition to
a split ground bus for superior performance.
Features
n ICC and IOZ 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 ’ACT245
n 4 kV minimum ESD immunity (’ACQ)
n Standard Military Drawing (SMD)
— ’ACTQ245: 5962-92187
— ’ACQ245: 5962-92177
Logic Symbols
Pin
Description
Names
OE
Output Enable Input
T/R
Transmit/Receive Input
A
0–A7
Side A TRI-STATE Inputs or TRI-STATE Outputs
B
0–B7
Side B TRI-STATE Inputs or TRI-STATE Outputs
GTOis a trademark of National Semiconductor Corporation.
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
FACT Quiet Seriesis a trademark of Fairchild Semiconductor Corporation.
DS100237-1
IEEE/IEC
DS100237-2
September 1998
© 1998 National Semiconductor Corporation
DS100237
www.national.com


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