mc54hc4538a Freescale Semiconductor, Inc, mc54hc4538a Datasheet

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mc54hc4538a

Manufacturer Part Number
mc54hc4538a
Description
Dual Precision Monostable Multivibrator Retriggerable, Resettable
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC54HC4538A.pdf (13 pages)

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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Dual Precision
Monostable Multivibrator
(Retriggerable, Resettable)
inputs are compatible with standard CMOS outputs; with pullup resistors,
they are compatible with LSTTL outputs.
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.
10/95
TRIGGER
INPUTS
Motorola, Inc. 1995
The MC54/74HC4538A is identical in pinout to the MC14538B. The device
This dual monostable multivibrator may be triggered by either the positive
Unlimited Rise and Fall Times Allowed on the Trigger Inputs
Output Pulse is Independent of the Trigger Pulse Width
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
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% Guaranteed Pulse Width Variation from Part to Part (Using the
RESET 1
A1
B1
4
5
3
C X 1
TRIGGER
1
INPUTS
LOGIC DIAGRAM
2
RESET 2
R X 1
A2
B2
6
7
12
11
13
Q1
Q1
V CC
C X 2
15
14
3–1
R X 2
10
9
Q2
Q2
V CC
MC54/74HC4538A
REV 6
16
16
Reset
16
H
H
H
H
H
H
L
1
1
C X 1/R X 1
RESET 1
MC54HCXXXXAJ
MC74HCXXXXAN
MC74HCXXXXAD
1
ORDERING INFORMATION
Inputs
GND
GND
L,H,
Q1
Q1
A1
B1
A
H
FUNCTION TABLE
L
X
L
X
X
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
L,H,
CERAMIC PACKAGE
B
H
X
H
X
X
L
PLASTIC PACKAGE
SOIC PACKAGE
CASE 751B–05
CASE 620–10
CASE 648–08
16
15
14
13
12
10
11
N SUFFIX
D SUFFIX
J SUFFIX
9
Ceramic
Plastic
SOIC
Not Triggered
Not Triggered
Not Triggered
Not Triggered
Not Triggered
V CC
GND
C X 2/R X 2
RESET 2
A2
B2
Q2
Q2
Q
L
Outputs
Q
H

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mc54hc4538a Summary of contents

Page 1

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 ...

Page 2

MC54/74HC4538A Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...

Page 3

Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...

Page 4

MC54/74HC4538A Î Î Î Î Î Î ...

Page 5

Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...

Page 6

MC54/74HC4538A 1.1 1.05 1 0.95 0.9 0.85 0.8 – 75 1.03 1.02 1.01 1 0.99 0.98 0.97 – 75 MOTOROLA 0 ...

Page 7

PLH 50 PHL 90% 10 50% RESET t TLH t PHL 90% 10 THL t PLH Q 90% 10% High–Speed CMOS ...

Page 8

MC54/74HC4538A INPUTS A1, A2 (Pins 4, 12) Positive–edge trigger inputs. A rising–edge signal on either of these pins triggers the corresponding multivibrator when there is a high level on the input. B1, B2 (Pins 5, 11) Negative–edge ...

Page 9

Figure 12 shows the HC4538A configured in the retrigger- able mode. Briefly, the device operates as follows (refer to Figure 10): In the quiescent state, the external timing capac- itor charged When ...

Page 10

MC54/74HC4538A When C x charges up to the reference voltage of the upper reference circuit (#17), the output of the upper reference cir- cuit goes low (#18). This causes the output latch to toggle, taking the Q output of the ...

Page 11

C X RISING–EDGE TRIGGER RESET = GND B FALLING–EDGE TRIGGER RESET = V CC Figure 12. Retriggerable Monostable Circuitry 100 ns MC14528B MC14536B MC14538B MC14541B HC4538A* TOTAL OUTPUT ...

Page 12

MC54/74HC4538A –A – –T – SEATING PLANE 0.25 (0.010) M –A – 0.25 (0.010) –A – ...

Page 13

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of ...

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