August 1989
Revised August 2001
74ACTQ273
Quiet Series Octal D-Type Flip-Flop
General Description
Features
The ACTQ273 has eight edge-triggered D-type flip-flops
with individual D inputs and Q outputs. The common buff-
ered Clock (CP) and Master Reset (MR) input load and
reset (clear) all flip-flops simultaneously.
■ ICC reduced by 50%
■ Guaranteed simultaneous switching noise level and
dynamic threshold performance
■ Guaranteed pin-to-pin skew AC performance
■ Improved latch-up immunity
The register is fully edge-triggered. The state of each D-
type input, one setup time before the LOW-to-HIGH clock
transition, is transferred to the corresponding flip-flop’s Q
output.
■ Buffered common clock and asynchronous master reset
■ Outputs source/sink 24 mA
All outputs will be forced LOW independently of Clock or
Data inputs by a LOW voltage level on the MR input. The
device is useful for applications where the true output only
is required and the Clock and Master Reset are common to
all storage elements.
■ 4 kV minimum ESD immunity
The ACTQ utilizes Fairchild Quiet Series technology to
guarantee quiet output switching and improved dynamic
threshold performance. FACT Quiet Series features
GTO output control and undershoot corrector in addition
to a split ground bus for superior performance.
Ordering Code:
Order Number Package Number
Package Description
74ACTQ273SC
74ACTQ273SJ
74ACTQ273MTC
74ACTQ273PC
M20B
M20D
MTC20
N20A
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
D0–D7
MR
Description
Data Inputs
Master Reset
CP
Clock Pulse Input
Data Outputs
Q0–Q7
FACT , FACT Quiet Series , and GTO are trademarks of Fairchild Semiconductor Corporation.
© 2001 Fairchild Semiconductor Corporation
DS010585
www.fairchildsemi.com