MC74HC4538A
FUNCTION TABLE
GND
C 1/R 1
1
2
3
4
5
6
7
8
16
15 GND
14 C 2/R 2
V
CC
Inputs
Outputs
X
X
Reset
A
B
Q
Q
RESET 1
A1
X
X
H
H
H
13 RESET 2
12 A2
L
B1
H
H
X
H
L
X
Not Triggered
Not Triggered
Q1
11 B2
Q1
10 Q2
H
H
L,H,
L
H
L,H,
Not Triggered
Not Triggered
GND
9
Q2
L
X
X
X
X
L
H
Not Triggered
Figure 1. Pin Assignment
C 1
X
R 1
X
V
CC
1
2
PIN 16 = V
CC
PIN 8 = GND
AND C ARE EXTERNAL COMPONENTS
PIN 1 AND PIN 15 MUST BE HARD WIRED TO GND
6
7
4
Q1
Q1
A1
R
X
TRIGGER
INPUTS
X
5
B1
3
RESET 1
C 2
X
R 2
X
V
CC
15 14
10
12
Q2
Q2
A2
B2
TRIGGER
INPUTS
11
9
13
RESET 2
Figure 2. Logic Diagram
ORDERING INFORMATION
†
Device
Package
Shipping
MC74HC4538AN
PDIP−16
500 Units / Box
500 Units / Box
MC74HC4538ANG
PDIP−16
(Pb−Free)
MC74HC4538AD
SOIC−16
48 Units / Rail
48 Units / Rail
MC74HC4538ADG
SOIC−16
(Pb−Free)
MC74HC4538ADR2
MC74HC4538ADR2G
SOIC−16
2500 Units / Reel
2500 Units / Reel
SOIC−16
(Pb−Free)
MC74HC4538ADTR2
TSSOP−16*
TSSOP−16*
SOEIAJ−16
2500 Units / Reel
2500 Units / Reel
50 Units / Rail
MC74HC4538ADTR2G
MC74HC4538AF
MC74HC4538AFG
SOEIAJ−16
(Pb−Free)
50 Units / Rail
MC74HC4538AFEL
MC74HC4538AFELG
SOEIAJ−16
2000 Units / Reel
2000 Units / Reel
SOEIAJ−16
(Pb−Free)
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*This package is inherently Pb−Free.
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