74ACQ544 Datasheet, PDF (1/9 Pages) Fairchild Semiconductor – Quiet Series™ Octal Registered Transceiver with 3-STATE Outputs

March 1990
Revised September 2000
74ACQ544 • 74ACTQ544
Quiet Series Octal Registered Transceiver
with 3-STATE Outputs
General Description
The ACQ/ACTQ544 is an inverting octal transceiver con-
taining two sets of D-type registers for temporary storage of
data flowing in either direction. Separate Latch Enable and
Output Enable inputs are provided for each register to per-
mit independent input and output control in either direction
of data flow. The 544 inverts data in both directions.
The ACQ/ACTQ utilizes Fairchild FACT Quiet Series
technology to guarantee quiet output switching and
improved dynamic threshold performance. FACT Quiet
Series features GTO output control and undershoot cor-
rector in addition to a split ground bus for superior perfor-
mance.
Features
s Guaranteed simultaneous switching noise level and
dynamic threshold performance
s Guaranteed pin-to-pin skew AC performance
s 8-bit inverting octal latched transceiver
s Separate controls for data flow in each direction
s Back-to-back registers for storage
s Outputs source/sink 24 mA
Ordering Code:
Order Number Package Number
Package Description
74ACQ544SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74ACQ544SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
74ACTQ544SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74ACTQ544SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
Description
OEAB
OEBA
CEAB
CEBA
LEAB
LEBA
A₀ –A₇
B₀ –B₇
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 3-STATE Outputs
B-to-A Data Inputs or
A-to-B 3-STATE Outputs
FACT, Quiet Series, FACT Quiet Series and GTO are trademarks of Fairchild Semiconductor Corporation.
© 2000 Fairchild Semiconductor Corporation DS010685
www.fairchildsemi.com