54FCT273 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Octal D-Type Flip-Flop

August 1998
54FCT273
Octal D-Type Flip-Flop
General Description
The ’FCT273 has eight edge-triggered D-type flip-flops with
individual D inputs and Q outputs. The common buffered
Clock (CP) and Master Reset (MR) inputs load and reset
(clear) all flip-flops simultaneously.
The register is fully edge-triggered. The state of each D in-
put, one setup time before the LOW-to-HIGH clock transi-
tion, is transferred to the corresponding flip-flop’s Q output.
All outputs will be forced LOW independently of Clock or
Data inputs by a LOW voltage level on the MR input. The de-
vice is useful for applications where the true output only is re-
quired and the Clock and Master Reset are common to all
storage elements.
Features
n Eight edge-triggered D flip-flops
n Buffered common clock
n Buffered, asynchronous Master Reset
n See ’FCT377 for clock enable version
n See ’FCT373 for transparent latch version
n See ’FCT374 for TRI-STATE^® version
n Output sink capability of 32 mA, source capability of
12 mA
n TTL input and output level compatible
n CMOS power consumption
n Standard Microcircuit Drawing (SMD) 5962-8765601
Ordering Code
Military
54FCT273DMQB
54FCT273FMQB
54FCT273LMQB
Package
Number
J20A
W20A
E20A
Connection Diagrams
Package Description
20-Lead Ceramic Dual-In-Line
20-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier, Type C
Pin Assignment for DIP
and Flatpack
Pin Assignment
for LCC
DS100956-1
Pin
Names
D₀– D₇
MR
CP
Q₀– Q₇
Description
Data Inputs
Master Reset
(Active LOW)
Clock Pulse Input
(Active Rising Edge)
Data Outputs
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100956
DS100956-2
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