SEMICONDUCTOR TECHNICAL DATA
High–Performance Silicon–Gate CMOS
The MC74HC147 is identical in pinout to the LS147. The device inputs are
compatible with standard CMOS outputs; with pullup resistors, they are
compatible with LSTTL outputs.
N SUFFIX
PLASTIC PACKAGE
CASE 648–08
16
This device encodes nine active–low data inputs to four active–low BCD
Address Outputs, ensuring that only the highest order active data line is
encoded. The implied decimal zero condition is encoded when all nine data
inputs are at a high level (inactive).
1
D SUFFIX
SOIC PACKAGE
CASE 751B–05
16
•
•
•
•
•
•
Output Drive Capability: 10 LSTTL Loads
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2 to 6 V
1
ORDERING INFORMATION
Low Input Current: 1 µA
MC74HCXXXN
MC74HCXXXD
Plastic
SOIC
High Noise Immunity Characteristic of CMOS Devices
In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
•
Chip Complexity: 136 FETs or 34 Equivalent Gates
PIN ASSIGNMENT
D4
D5
1
2
16
15
V
CC
NC
LOGIC DIAGRAM
D6
D7
D8
3
4
5
14
13
12
A3
D3
D2
11
D1
12
D2
13
D3
D4
D5
D6
D7
D8
D9
9
7
6
A2
6
11
D1
A0
A1
A2
A3
1
2
BCD
ADDRESS
OUTPUTS
(ACTIVE–LOW)
A1
7
8
10
9
D9
A0
DECIMAL
DATA INPUTS
(ACTIVE–LOW)
GND
3
14
NC = NO CONNECTION
4
5
10
FUNCTION TABLE
Inputs
V
= PIN 16
Outputs
CC
GND = PIN 8
NO CONNECTION = PIN 15
D9 D8 D7 D6 D5 D4 D3 D2 D1 A3 A2 A1 A0
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
L
X
X
X
H
H
H
H
H
L
X
X
X
X
H
H
H
H
L
X
X
X
X
X
H
H
H
L
X
X
X
X
X
X
H
H
L
X
X
X
X
X
X
X
H
L
H
H
H
H
H
H
H
H
L
H
H
H
H
L
H
H
L
H
L
H
L
H
L
H
L
X
X
X
X
X
X
X
X
L
H
H
L
L
L
L
L
X
X
H
H
H
H
H
L
X
L
10/95
Motorola, Inc. 1995
REV 6
1