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鈥檚 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
Y
Y
Y
Y
Y
Y
Y
Y
Y
5V tolerant inputs and outputs
10
mA
I
CCQ
max
Power-down high impedance inputs and outputs
Supports live insertion withdrawal
2 0V鈥? 6V V
CC
supply operation
g
24 mA output drive
Implements patented Quiet Series
TM
noise EMI
reduction circuitry
Functionally compatible with the 74 series 273
Latch-up performance exceeds 500 mA
ESD performance
Human Body Model
l
2000V
Machine Model
l
200V
Logic Symbols
IEEE IEC
Connection Diagram
Pin Assignment for
SOIC SSOP and TSSOP
TL F 12640鈥?
TL F 12640 鈥?2
TL F 12640 鈥?3
Pin Names
D
0
鈥?D
7
MR
CP
Q
0
鈥換
7
SOIC JEDEC
Order Number
See NS Package Number
74LCX273WM
74LCX273WMX
M20B
Description
Data Inputs
Master Reset
Clock Pulse Input
Data Outputs
SOIC EIAJ
74LCX273SJ
74LCX273SJX
M20D
SSOP Type II
74LCX273MSA
74LCX273MSAX
MSA20
TSSOP JEDEC
74LCX273MTC
74LCX273MTCX
MTC20
TRI-STATE is a registered trademark of National Semiconductor Corporation
Quiet Series
TM
is a trademark of National Semiconductor Corporation
C
1996 National Semiconductor Corporation
TL F 12640
RRD-B30M17 Printed in U S A
http
www national com
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