54ACTQ16646
16-Bit Transceiver/Register with TRI-STATE
®
Outputs
General Description
The ’ACTQ16646 contains sixteen non-inverting bidirec-
tional registered bus transceivers providing multiplexed
transmission of data directly from the input bus or from the
internal storage registers. Each byte has separate control in-
puts which can be shorted together for full 16-bit operation.
The DIR inputs determine the direction of data flow through
the device. The CPAB and CPBA inputs load data into the
registers on the LOW-to-HIGH transition. The ’ACTQ16646
utilizes NSC Quiet Series technology to guarantee quiet out-
put switching and improved dynamic threshold performance.
FACT Quiet Series
®
features GTO
®
output control and un-
dershoot corrector for superior performance.
Features
n Utilizes NSC FACT Quiet Series technology
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n Independent registers for A and B buses
n Multiplexed real-time and stored data transfers
n Separate control logic for each byte
n 16-bit version of the ’ACTQ646
n Outputs source/sink 24 mA
n Standard Microcircuit Drawing (SMD) 5962-9581601
Logic Symbol
GTO™ is a trademark of National Semiconductor Corporation.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
FACT™ and FACT Quiet Series™ are trademarks of Fairchild Semiconductor Corporation.
DS010937-1
September 1998
54ACTQ16646
16-Bit
T
ransceiver/Register
with
TRI-ST
A
T
E
Outputs
© 1998 National Semiconductor Corporation DS010937 www.national.com