TL F 12640
74LCX273
Low-Voltage
Octal
D
Flip-Flop
with
5V
Tolerant
Inputs
and
Outputs
ADVANCE INFORMATION
November 1996
74LCX273
Low-Voltage Octal D Flip-Flop
with 5V Tolerant Inputs and Outputs
General Description
The LCX273 has eight edge-triggered D-type flip-flops with
individual D inputs and Q outputs The common buffered
Clock (CP) and Master Reset (MR) input 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 tran-
sition is transferred to the corresponding flip-flop's Q out-
put
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
The device is designed for low voltage (3 3V) V
CC
applica-
tions with capability of interfacing to a 5V signal environ-
ment The LCX273 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation
Features
Y
5V tolerant inputs and outputs
Y
10 mA I
CCQ
max
Y
Power-down high impedance inputs and outputs
Y
Supports live insertion withdrawal
Y
2 0V 3 6V V
CC
supply operation
Y
g
24 mA output drive
Y
Implements patented Quiet Series
TM
noise EMI
reduction circuitry
Y
Functionally compatible with the 74 series 273
Y
Latch-up performance exceeds 500 mA
Y
ESD performance
Human Body Model
l
2000V
Machine Model
l
200V
Logic Symbols
TL F 12640 1
IEEE IEC
TL F 12640 2
Connection Diagram
Pin Assignment for
SOIC SSOP and TSSOP
TL F 12640 3
Pin Names
Description
D
0
D
7
Data Inputs
MR
Master Reset
CP
Clock Pulse Input
Q
0
Q
7
Data Outputs
SOIC JEDEC
SOIC EIAJ
SSOP Type II
TSSOP JEDEC
Order Number
74LCX273WM
74LCX273SJ
74LCX273MSA
74LCX273MTC
74LCX273WMX
74LCX273SJX
74LCX273MSAX
74LCX273MTCX
See NS Package Number
M20B
M20D
MSA20
MTC20
TRI-STATE
is a registered trademark of National Semiconductor Corporation
Quiet Series
TM
is a trademark of National Semiconductor Corporation
C1996 National Semiconductor Corporation
RRD-B30M17 Printed in U S A
http
www national com
74LCX273
Low-Voltage
Octal
D
Flip-Flop
with
5V
Tolerant
Inputs
and
Outputs
LIFE SUPPORT POLICY
NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
2 A critical component is any component of a life
systems which (a) are intended for surgical implant
support device or system whose failure to perform can
into the body or (b) support or sustain life and whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system or to affect its safety or
with instructions for use provided in the labeling can
effectiveness
be reasonably expected to result in a significant injury
to the user
National Semiconductor
National Semiconductor
National Semiconductor
National Semiconductor
Corporation
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National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications
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