74ACTQ16543 16-Bit Registered Transceiver with 3-STATE Outputs
December 1991
Revised December 1998
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鈩?technol-
ogy to guarantee quiet output switching and improved
dynamic threshold performance. FACT Quiet Series鈩?fea-
tures GTO鈩?output control and undershoot corrector for
superior performance.
Features
s
Utilizes Fairchild FACT Quiet Series technology
s
Guaranteed simultaneous switching noise level and
dynamic threshold performance
s
Guaranteed pin-to-pin output skew
s
Independent registers for A and B buses
s
Separate controls for data flow in each direction
s
Back-to-back registers for storage
Multiplexed real-time and stored data transfers
s
Separate control logic for each byte
s
16-bit version of the ACTQ543
s
Outputs source/sink 24 mA
s
Additional specs for Multiple Output Switching
s
Output loading specs for both 50 pF and 250pF loads
Ordering Code:
Order Number
74ACTQ16543SSC
74ACTQ16543MTD
Package Number
MS56A
MTD56
Package Description
56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300鈥?Wide
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Device also available in Tape and Reel. Specify by appending suffix letter 鈥淴鈥?to the ordering code.
Logic Symbol
Pin Descriptions
Pin Names
OEAB
n
OEBA
n
CEAB
n
CEBA
n
LEAB
n
LEBA
n
A
0
鈥揂
15
B
0
鈥揃
15
Descriptions
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鈩? Quiet Series鈩? FACT Quiet Series鈩?and GTO鈩?are trademarks of Fairchild Semiconductor Corporation.
漏 1999 Fairchild Semiconductor Corporation
DS010967.prf
www.fairchildsemi.com