54ACTQ544 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Quiet Series Octal Registered Transceiver with TRI-STATE Outputs

August 1998
54ACTQ544
Quiet Series Octal Registered Transceiver with
TRI-STATE^® Outputs
General Description
The ACTQ544 is an inverting octal transceiver containing
two sets of D-type registers for temporary storage of data
flowing in either direction. Separate Latch Enable and Out-
put Enable inputs are provided for each register to permit in-
dependent input and output control in either direction of data
flow. The ’544 inverts data in both directions.
The ACTQ utilizes NSC Quiet Series technology to guaran-
tee quiet output switching and improved dynamic threshold
performance. FACT Quiet Series™ features GTO™ output
control and undershoot corrector in addition to a split ground
bus for superior performance.
Features
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n 8-bit inverting octal latched transceiver
n Separate controls for data flow in each direction
n Back-to-back registers for storage
n Outputs source/sink 24 mA
n 4 kV minimum ESD immunity
Logic Symbols
IEEE/IEC
DS100248-1
Pin Names
OEAB
OEBA
CEAB
CEBA
LEAB
LEBA
A₀ –A₇
B₀ –B₇
Description
A-to-B Output Enable Input (Active LOW)
B-to-A Output Enable Input (Active LOW)
A-to-B Enable Input (Active LOW)
B-to-A Enable Input (Active LOW)
A-to-B Latch Enable Input (Active LOW)
B-to-A Latch Enable Input (Active LOW)
A-to-B Data Inputs or
B-to-A TRI-STATE Outputs
B-to-A Data Inputs or
A-to-B TRI-STATE Outputs
GTO™ is 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 Series™ is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100248
DS100248-4
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