74LS148 8 To 3 Line Priority Encoder IC

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The 74LS148 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. The 74LS148 has built-in Schottky barrier diode to process for high speed. It features priority decoding of the inputs to ensure that only the highest-order data line is encoded.

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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.

74LS148 Pinout

74LS148 Pin Configuration

Pin No	Pin Name	Description
1	4	Octal Input Pin 1
2	5	Octal Input Pin 2
3	6	Octal Input Pin 3
4	7	Octal Input Pin 4
5	E1	Active Low Enable Pin
6	A2	Binary Output Pin A2
7	A1	Binary Output Pin A1
8	GND	Ground
9	A0	Binary Output Pin A0
10	0	Octal Input Pin 10
11	1	Octal Input Pin 11
12	2	Octal Input Pin 12
13	3	Octal Input Pin 13
14	GS	Gray Output Pin GS
15	EO	Gray Output Pin EO
16	Vcc	Chip Supply Voltage

74LS148 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 (#): 3
Configuration: 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 74LS148 8 To 3 Line Priority Encoder from the link given below:

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