SN74HC148DR

Product Overview

• Category: Integrated Circuit
• Use: Priority Encoder
• Characteristics: High-speed, CMOS technology
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Converts multiple input signals into a binary-coded output
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Number of Inputs: 8
• Number of Outputs: 3
• Maximum Propagation Delay: 25 ns
• Maximum Quiescent Current: 4 µA

Detailed Pin Configuration

1. GND (Ground)
2. A0 (Input A0)
3. A1 (Input A1)
4. A2 (Input A2)
5. A3 (Input A3)
6. A4 (Input A4)
7. A5 (Input A5)
8. A6 (Input A6)
9. A7 (Input A7)
10. EO (Enable Output)
11. VCC (Supply Voltage)
12. Y0 (Output Y0)
13. Y1 (Output Y1)
14. Y2 (Output Y2)

Functional Features

• Converts 8-line input signals into a 3-bit binary-coded output
• Prioritizes the highest-order active input
• Provides an enable output for cascading multiple encoders
• Utilizes CMOS technology for high-speed operation
• Low power consumption with a maximum quiescent current of 4 µA

Advantages

• High-speed operation allows for efficient signal processing
• CMOS technology ensures low power consumption
• Compact SOIC package enables space-saving integration
• Enable output facilitates cascading of multiple encoders

Disadvantages

• Limited number of outputs restricts the range of applications
• Requires external components for proper functioning in complex systems

Working Principles

The SN74HC148DR is a priority encoder that converts multiple input signals into a binary-coded output. It prioritizes the highest-order active input and provides a 3-bit output representing the encoded value. The enable output allows for cascading multiple encoders to handle larger input signal sets. The CMOS technology used in this IC ensures high-speed operation while maintaining low power consumption.

Detailed Application Field Plans

The SN74HC148DR finds applications in various fields, including:

1. Data Encoding: Used in data communication systems to encode multiple input signals into a binary format.
2. Address Decoding: Enables efficient decoding of memory addresses in microcontrollers and digital systems.
3. Priority-Based Control: Utilized in control systems to prioritize inputs based on their significance.
4. Multiplexing: Facilitates multiplexing of multiple input signals onto a single line for transmission or processing.

Detailed and Complete Alternative Models

1. CD74HC148E: Similar functionality with DIP (Dual Inline Package) packaging.
2. SN54HC148J: Equivalent performance with ceramic DIP packaging.
3. MC14532B: Comparable priority encoder with different pin configuration and package options.

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