54ACTQ574 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Quiet Series Octal D Flip-Flop with TRI-STATE Outputs

August 1998
54ACTQ574
Quiet Series Octal D Flip-Flop with TRI-STATE^® Outputs
General Description
The ACTQ574 is a high-speed, low-power octal D-type
flip-flop with a buffered Common Clock (CP) and a buffered
common Output Enable (OE). The information presented to
the D inputs is stored in the flip-flops on the LOW-to-HIGH
clock (CP) transition.
ACTQ574 utilizes Quiet Series technology to guarantee
quiet output switching and improve dynamic threshold per-
formance. FACT Quiet Series™ features GTO™ output con-
trol and undershoot corrector in addition to a split ground bus
for superior performance.
The ACTQ574 is functionally identical to the ’ACTQ374 but
with different pin-out.
Features
n I_CC and I_OZ reduced by 50%
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n Inputs and outputs on opposite sides of the package
allowing easy interface with microprocessors
n Functionally identical to the ACTQ374
n TRI-STATE outputs drive bus lines or buffer memory
address registers
n Outputs source/sink 24 mA
n Faster prop delays than the standard ACT574
n 4 kV minimum ESD immunity
Logic Diagrams
IEEE/IEC
DS100243-1
Pin Names
D₀– D₇
CP
OE
O₀– O₇
Description
Data Inputs
Clock Pulse Input
TRI-STATE Output Enable Input
TRI-STATE Outputs
DS100243-2
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 DS100243
www.national.com