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MM74HC4538M Datasheet

  • MM74HC4538M

  • Fairchild Semiconductor [Dual Retriggerable Monostable Mult...

  • 121.57KB

  • FAIRCHILD

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MM74HC4538 Dual Retriggerable Monostable Multivibrator
February 1984
Revised August 2000
MM74HC4538
Dual Retriggerable Monostable Multivibrator
General Description
The MM74HC4538 high speed monostable multivibrator
(one shots) is implemented in advanced silicon-gate
CMOS technology. They feature speeds comparable to low
power Schottky TTL circuitry while retaining the low power
and high noise immunity characteristic of CMOS circuits.
Each multivibrator features both a negative, A, and a posi-
tive, B, transition triggered input, either of which can be
used as an inhibit input. Also included is a clear input that
when taken low resets the one shot. The MM74HC4538 is
retriggerable. That is, it may be triggered repeatedly while
their outputs are generating a pulse and the pulse will be
extended.
Pulse width stability over a wide range of temperature and
supply is achieved using linear CMOS techniques. The out-
put pulse equation is simply: PW
=
0.7(R)(C) where PW is
in seconds, R is in ohms, and C is in farads. This device is
pin compatible with the CD4528, and the CD4538 one
shots. All inputs are protected from damage due to static
discharge by diodes to V
CC
and ground.
Features
s
Schmitt trigger on A and B inputs
s
Wide power supply range: 2鈥?V
s
Typical trigger propagation delay: 32 ns
s
Fanout of 10 LS-TTL loads
s
Low input current: 1
碌
A max
Ordering Code:
Order Number
MM74HC4538M
MM74HC4538SJ
MM74HC4538N
Package Number
M16A
M16D
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Connection Diagram
Truth Table
Inputs
Clear
L
X
X
H
H
A
X
H
X
L
B
X
X
L
Q
L
L
Outputs
Q
H
H
鈫?/div>
H
鈫?/div>
H
=
HIGH Level
L
=
LOW Level
鈫?=
Transition from LOW-to-HIGH
鈫?=
Transition from HIGH-to-LOW
=
One HIGH Level Pulse
=
One LOW Level Pulse
X
=
Irrelevant

L
H

漏 2000 Fairchild Semiconductor Corporation
DS005217
www.fairchildsemi.com

MM74HC4538M 产品属性

  • 48

  • 集成电路 (IC)

  • 逻辑 - 多频振荡器

  • 74HC

  • 单稳态

  • 2

  • 是

  • 26ns

  • 5.2mA，5.2mA

  • 2 V ~ 6 V

  • -40°C ~ 85°C

  • 表面贴装

  • 16-SOIC（0.154"，3.90mm 宽）

  • 16-SOIC

  • 管件

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