54AC574 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – Octal D-Type Flip-Flop with TRI-STATE Outputs

September 1998
54AC574 • 54ACT574
Octal D-Type Flip-Flop with TRI-STATE^® Outputs
General Description
The ’AC/’ACT574 is a high-speed, low power octal flip-flop
with a buffered common Clock (CP) and a buffered common
Output Enable (OE). The information presented to the D in-
puts is stored in the flip-flops on the LOW-to-HIGH Clock
(CP) transition.
The ’AC/’ACT574 is functionally identical to the ’AC/’ACT374
except for the pinouts.
Features
n I_CC and I_OZ reduced by 50%
n Inputs and outputs on opposite sides of package
allowing easy interface with microprocessors
n Useful as input or output port for microprocessors
n Functionally identical to ’AC/’ACT374
n TRI-STATE outputs for bus-oriented applications
n Outputs source/sink 24 mA
n ’ACT574 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
— ’ACT574: 5962-89601
Logic Symbols
IEEE/IEC
DS100256-1
DS100256-4
Pin Names
D₀– D₇
CP
OE
O₀– O₇
Description
Data Inputs
Clock Pulse Input
TRI-STATE Output Enable Input
TRI-STATE Outputs
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
FACT™ is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100256
www.national.com