参数资料
型号: MM54HC75
厂商: National Semiconductor Corporation
英文描述: 4-Bit Bistable Latch with Q and Q Output
中文描述: 4位双稳态锁存与Q和Q输出
文件页数: 1/4页
文件大小: 150K
代理商: MM54HC75
TL/F/5303
M
January 1988
MM54HC75/MM74HC75
4-Bit Bistable Latch with Q and Q Output
General Description
This 4-bit latch utilizes advanced silicon-gate CMOS tech-
nology to achieve the high noise immunity and low power
consumption normally associated with standard CMOS inte-
grated circuits. These devices can drive 10 LS-TTL loads.
This latch is ideally suited for use as temporary storage for
binary information processing, input/output, and indicator
units. Information present at the data (D) input is transferred
to the Q output when the enable (G) is high. The Q output
will follow the data input as long as the enable remains high.
When the enable goes low, the information that was present
at the data input at the time the transition occurred is re-
tained at the Q output until the enable is permitted to go
high again.
The 54HC/74HC logic family is functionally as well as pin-
out compatible with the standard 54LS/74LS logic family.
All inputs are protected from damage due to static dis-
charge by internal diode clamps to V
CC
and ground.
Features
Y
Typical operating frequency: 50 MHz
Y
Typical propagation delay: 12 ns
Y
Wide operating supply voltage range: 2–6V
Y
Low input current: 1
m
A maximum
Y
Low quiescent supply current: 80
m
A maximum
(74HC Series)
Y
Fanout of 10 LS-TTL loads
Connection and Logic Diagrams
Dual-In-Line Package
TL/F/5303–1
Order Number MM54HC75 or MM74HC75
Truth Table
Inputs
Outputs
D
G
Q
Q
L
H
X
H
H
L
L
H
Q
0
H
L
Q
0
H
e
High Level: L
e
Low Level
X
e
Don’t Care
Q
0
e
The level of Q before the transition of G
(1 of 4 latches)
TL/F/5303–2
C
1995 National Semiconductor Corporation
RRD-B30M105/Printed in U. S. A.
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