December 1991
Revised December 1998
74ACTQ16543 16-Bit Registered Transceiver with 3-STATE Outputs
© 1999 Fairchild Semiconductor Corporation DS010967.prf www.fairchildsemi.com
74ACTQ16543
16-Bit Registered Transceiver with 3-STATE Outputs
General Description
The ACTQ16543 contains sixteen non-inverting transceiv-
ers containing two sets of D-type registers for temporary
storage of data flowing in either direction. Each byte has
separate control inputs which can be shorted together for
full 16-bit operation. Separate Latch Enable and Output
Enable inputs are provided for each register to permit inde-
pendent input and output control in either direction of data
flow.
The ACTQ16543 utilizes Fairchild Quiet Series technol-
ogy to guarantee quiet output switching and improved
dynamic threshold performance. FACT Quiet Series fea-
tures GTO output control and undershoot corrector for
superior performance.
Features
■ Utilizes Fairchild FACT Quiet Series technology
■ Guaranteed simultaneous switching noise level and
dynamic threshold performance
■ Guaranteed pin-to-pin output skew
■ Independent registers for A and B buses
■ Separate controls for data flow in each direction
■ Back-to-back registers for storage
Multiplexed real-time and stored data transfers
■ Separate control logic for each byte
■ 16-bit version of the ACTQ543
■ Outputs source/sink 24 mA
■ Additional specs for Multiple Output Switching
■ Output loading specs for both 50 pF and 250pF loads
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol Pin Descriptions
FACT, Quiet Series, FACT Quiet Series and GTO are trademarks of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74ACTQ16543SSC MS56A 56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300” Wide
74ACTQ16543MTD MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Pin Names Descriptions
OEAB
n
A-to-B Output Enable Input (Active LOW)
OEBA
n
B-to-A Output Enable Input (Active LOW)
CEAB
n
A-to-B Enable Input (Active LOW)
CEBA
n
B-to-A Enable Input (Active LOW)
LEAB
n
A-to-B Latch Enable Input (Active LOW)
LEBA
n
B-to-A Latch Enable Input (Active LOW)
A
0
–A
15
A-to-B Data Inputs or
B-to-A 3-STATE Outputs
B
0
–B
15
B-to-A Data Inputs or
A-to-B 3-STATE Outputs
