MC54HC4538AJ

Manufacturer Part NumberMC54HC4538AJ
DescriptionDual precision monostable multivibrator
ManufacturerMotorola
MC54HC4538AJ datasheet
 
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Dual Precision
Monostable Multivibrator
(Retriggerable, Resettable)
The MC54/74HC4538A 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, R x and
C x . 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 A
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
LOGIC DIAGRAM
C X 1
R X 1
1
2
4
A1
TRIGGER
5
INPUTS
B1
3
RESET 1
A2
TRIGGER
INPUTS
B2
RESET 2
PIN 16 = V CC
PIN 8 = GND
R X AND C X ARE EXTERNAL COMPONENTS
PIN 1 AND PIN 15 MUST BE HARD WIRED TO GND
10/95
Motorola, Inc. 1995
MC54/74HC4538A
V CC
6
Q1
7
Q1
C X 2
R X 2
V CC
15
14
10
12
Q2
11
9
Q2
13
3–1
J SUFFIX
CERAMIC PACKAGE
16
CASE 620–10
1
N SUFFIX
PLASTIC PACKAGE
16
CASE 648–08
1
D SUFFIX
SOIC PACKAGE
16
CASE 751B–05
1
ORDERING INFORMATION
MC54HCXXXXAJ
Ceramic
MC74HCXXXXAN
Plastic
MC74HCXXXXAD
SOIC
PIN ASSIGNMENT
GND
1
16
V CC
C X 1/R X 1
2
15
GND
RESET 1
3
14
C X 2/R X 2
RESET 2
A1
4
13
B1
5
12
A2
Q1
6
11
B2
Q1
7
10
Q2
GND
8
9
Q2
FUNCTION TABLE
Inputs
Outputs
Reset
A
B
Q
Q
H
H
H
L
H
X
L
Not Triggered
H
H
X
Not Triggered
H
L,H,
H
Not Triggered
H
L
L,H,
Not Triggered
L
X
X
L
H
X
X
Not Triggered
REV 6

MC54HC4538AJ Summary of contents