MC74HC4538AFR1 Просмотр технического описания (PDF) - ON Semiconductor
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MC74HC4538AFR1 Datasheet PDF : 12 Pages
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MC74HC4538A
Dual Precision
Monostable Multivibrator
(Retriggerable, Resettable)
The MC74HC4538A is identical in pinout to the MC14538B. The
device inputs are compatible with standard CMOS outputs; with
pullup resistors, they are compatible with LSTTL outputs.
This dual monostable multivibrator may be triggered by either the
positive or the negative edge of an input pulse, and produces a
precision output pulse over a wide range of pulse widths. Because the
device has conditioned trigger inputs, there are no trigger–input rise
and fall time restrictions. The output pulse width is determined by the
external timing components, Rx and Cx. The device has a reset
function which forces the Q output low and the Q output high,
regardless of the state of the output pulse circuitry.
• Unlimited Rise and Fall Times Allowed on the Trigger Inputs
• Output Pulse is Independent of the Trigger Pulse Width
• ± 10% Guaranteed Pulse Width Variation from Part to Part (Using
the Same Test Jig)
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS and TTL
• Operating Voltage Range: 3.0 to 6.0 V
• Low Input Current: 1.0 µA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 145 FETs or 36 Equivalent Gates
TRIGGER A1 4
INPUTS B1 5
LOGIC DIAGRAM
CX1
RX1
VCC
12
6 Q1
7 Q1
RESET 1 3
TRIGGER A2 12
INPUTS B2 11
CX2
RX2
VCC
15 14
10 Q2
9 Q2
PIN 16 = VCC
PIN 8 = GND
RESET 2 13
RX AND CX ARE EXTERNAL COMPONENTS
PIN 1 AND PIN 15 MUST BE HARD WIRED TO GND
© Semiconductor Components Industries, LLC, 2000
1
March, 2000 – Rev. 7
http://onsemi.com
16
1
16
1
MARKING
DIAGRAMS
16
PDIP–16
N SUFFIX
CASE 648
MC74HC4538AN
AWLYYWW
1
16
SO–16
D SUFFIX
CASE 751B
HC4538A
AWLYWW
1
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
PIN ASSIGNMENT
GND 1
CX1/RX1 2
RESET 1 3
A1 4
B1 5
Q1 6
Q1 7
GND 8
16 VCC
15 GND
14 CX2/RX2
13 RESET 2
12 A2
11 B2
10 Q2
9 Q2
FUNCTION TABLE
Inputs
Reset A
B
Outputs
Q
Q
H
H
H
L
H
X
H
H
L
Not Triggered
X
Not Triggered
H L,H,
H
Not Triggered
H
L
L,H,
Not Triggered
L
X
X
X
L
H
X
Not Triggered
ORDERING INFORMATION
Device
Package Shipping
MC74HC4538AN
PDIP–16 2000 / Box
MC74HC4538AD
SOIC–16 48 / Rail
MC74HC4538ADR2
SOIC–16 2500 / Reel
Publication Order Number:
MC74HC4538A/D
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