74147 IC High Speed CMOS Logic 10 to 4 Line
Priority Encoder
DIP-16
The 74147 IC High-Speed CMOS Logic 10 to 4 Line Priority Encoder (DIP-16) is a digital device designed to convert ten active low input signals into a 4-bit binary coded decimal (BCD) output. It assigns priority to the highest-order active input, ensuring reliable encoding even when multiple inputs are active simultaneously. This IC is widely used in digital systems for key encoding, data compression, and input device interfacing. With its high-speed operation, low power consumption, and TTL/CMOS compatibility, the 74147 provides an efficient solution for priority encoding applications in logic circuits and microprocessor-based systems.
Features
Converts 10 active low inputs to a 4-bit binary coded decimal (BCD) output.
Provides priority encoding highest input has priority when multiple inputs are active.
TTL and CMOS logic level compatible.
High-speed and low power consumption operation.
Easy cascading for expanding input capacity.
Standard 16-pin Dual In-Line Package (DIP-16) for easy prototyping and PCB mounting.
Wide operating voltage range for flexible circuit design.
Ideal for digital encoding, keyboard interfaces, and data selection systems.
Pinout Configuration
Logic Symbol
Truth Table
Decimal Digits
BCD Code
0
A
B
C
D
1
0
0
0
0
2
0
0
0
1
3
0
0
1
1
4
0
1
0
0
5
0
1
0
1
6
0
1
1
0
7
0
1
1
1
8
1
0
0
0
9
1
0
0
1
Specifications
Parameter
Description
IC Number
74147
Function Type
10-to-4 Line Priority Encoder
Logic Family
TTL / CMOS Compatible
Input Type
Active Low
Output Type
Binary Coded Decimal (BCD)
Number of Inputs
10
Number of Outputs
4
Propagation Delay Time
20 nsec
Operating Voltage (Vcc)
4.75V to 5.25V
High-Level Output Voltage (min)
2.4V
Low-Level Output Voltage (max)
0.4V
Input High Voltage (min)
2.0V
Input Low Voltage (max)
0.8V
Power Dissipation
500 mW
Operating Temperature
0C to +70C
Package Type
DIP-16 (Dual Inline Package)
Mounting Type
Through Hole
Dimensions
Applications
Keyboard and keypad encoding systems.
Digital data selection and compression circuits.
Binary coded decimal (BCD) generation in digital systems.
Input prioritization in control and automation systems.
Microprocessor and microcontroller interfacing.
Signal multiplexing and data routing applications.
Display and indicator control circuits.
Digital communication and encoding logic designs.
Package Contents
1 x
74147 IC High Speed CMOS Logic 10 to 4 Line Priority Encoder DIP-16
Datasheet
74147
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