March 1993
54ACQ/74ACQ374 54ACTQ/74ACTQ374
#
Quiet Series Octal D Flip-Flop
with TRI-STATE Outputs
É
General Description
Features
Y
CC
I
and I
reduced by 50%
OZ
The ’ACQ/’ACTQ374 is a high-speed, low-power octal D-
type flip-flop featuring separate D-type inputs for each flip-
flop and TRI-STATE outputs for bus-oriented applications. A
buffered Clock (CP) and Output Enable (OE) are common to
all flip-flops.
Y
Guaranteed simultaneous switching noise level and
dynamic threshold performance
Y
Y
Y
Y
Guaranteed pin-to-pin skew AC performance
Improved latch-up immunity
The ’ACQ/’ACTQ374 utilizes Quiet Series technology to
guarantee quiet output switching and improve dynamic
threshold performance. FACT Quiet SeriesTM features
GTOTM output control and undershoot corrector in addition
to a split ground bus for superior performance.
Buffered positive edge-triggered clock
TRI-STATE outputs drive bus lines or buffer memory
address registers
Y
Y
Y
Y
Outputs source/sink 24 mA
Faster prop delays than the standard ’AC/’ACT374
4 kV minimum ESD immunity
Standard Military Drawing (SMD)
Ð ’ACTQ374: 5962-92189
Ð ’ACQ374: 5962-92179
Logic Symbols
Connection Diagrams
Pin Assignment for DIP,
Flatpak, QSOP and SOIC
IEEE/IEC
TL/F/10238–1
TL/F/10238–3
TL/F/10238–2
Pin Assignment
for LCC
Pin Names
Description
Data Inputs
D –D
0
7
CP
OE
Clock Pulse Input
TRI-STATE Output Enable Input
TRI-STATE Outputs
O –O
0
7
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.
FACTTM, FACT Quiet SeriesTM, and GTOTM are trademarks of National Semiconductor Corporation.
TL/F/10238–4
C
1995 National Semiconductor Corporation
TL/F/10238
RRD-B30M75/Printed in U. S. A.