74LS147 10-To-4 Line Priority Encoder IC

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The 74LS147 features priority decoding of the inputs to ensure that only the highest-order data line is encoded. The 74LS147 encode nine data lines to four-line (8-4-2-1) BCD. The 74LS147 has built-in Schottky barrier diode to process for high speed. The 74LS147 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers.

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What is a Priority Encoder?

A priority encoder provide ‘n’ bits of binary coded output representing the position of the highest order active input of 2ⁿ inputs. If two or more inputs are high at the same time, the input having the highest priority will take precedence.

74LS147 Pinout

74LS147 Pin Configuration

Pin No	Pin Name	Description
1	4	Decimal Input Pin 1
2	5	Decimal Input Pin 2
3	6	Decimal Input Pin 3
4	7	Decimal Input Pin 4
5	8	Decimal Input Pin 5
6	C	Output Pin C
7	B	Output Pin B
8	GND	Ground Pin
9	A	Output Pin A
10	9	Decimal Input Pin 10
11	1	Decimal Input Pin 11
12	2	Decimal Input Pin 12
13	3	Decimal Input Pin 13
14	D	Output Pin D
15	NC	Not Used
16	Vcc	Chip Supply Voltage

74LS147 Features & Specifications

Technology Family: LS
Rating: Catalog
Supply voltage: 4.75V to 5.5V
Frequency at nominal voltage: 35 MHz
Typical propagation delay: 21nS
Low power consumption: 32mW
ESD protection
Operating temperature: 0ºC to 70ºC
ESD CDM (kV): 0.75
ESD HBM (kV): 2
Balanced propagation delays
Designed specifically for high speed
IOL (Max): 8mA
IOH (Max): -0.4mA
Bits (#): 4
Channels (#): 2
Configuration: 2:4 & 8:3
Product type: Standard

Applications

It is used to control interrupt requests by acting on the highest priority request
Also used to encode the output of a flash analog to digital converter

You can download this Datasheet for 74LS147 10-To-4 Line Priority Encoder from the link given below:

Download Datasheet