SN74HC148DRE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Priority Encoder
• Characteristics: High-speed, CMOS technology
• Package: SOIC-16
• Essence: Encodes priority of input lines
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 18 ns (typical)
• Number of Inputs: 8
• Number of Outputs: 3

Detailed Pin Configuration

The SN74HC148DRE4 has a total of 16 pins. The pin configuration is as follows:

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. E1 (Enable Input 1)
12. E2 (Enable Input 2)
13. E3 (Enable Input 3)
14. Y0 (Output Y0)
15. Y1 (Output Y1)
16. Y2 (Output Y2)

Functional Features

The SN74HC148DRE4 is a priority encoder IC that encodes the priority of its input lines. It has 8 input lines (A0-A7) and 3 output lines (Y0-Y2). The encoder determines the highest priority input and provides a binary code on the output lines corresponding to that input. It also has enable inputs (E1-E3) and an enable output (EO) for controlling the operation of the encoder.

Advantages and Disadvantages

Advantages: - High-speed operation - CMOS technology for low power consumption - Compact SOIC-16 package - Easy to use and integrate into digital circuits

Disadvantages: - Limited number of output lines - Requires external components for complete functionality in certain applications

Working Principles

The SN74HC148DRE4 works by assigning priority to its input lines based on their binary weight. The highest priority input with a logic high signal is encoded into a binary code on the output lines. The enable inputs control the operation of the encoder, allowing it to be enabled or disabled as required. The IC operates using CMOS technology, providing high-speed performance and low power consumption.

Detailed Application Field Plans

The SN74HC148DRE4 is commonly used in various applications where priority encoding is required. Some of the detailed application field plans include:

1. Interrupt handling in microcontrollers and processors.
2. Data multiplexing and selection in digital systems.
3. Priority-based control systems.
4. Address decoding in memory and I/O devices.
5. Traffic light control systems.
6. Robotics and automation systems.

Detailed and Complete Alternative Models

There are several alternative models available that provide similar functionality to the SN74HC148DRE4. Some of the popular alternatives include:

1. CD74HC148E - DIP-16 package, similar specifications.
2. 74LS148 - TTL technology, different pin configuration.
3. SN54/74LS147 - TTL technology, different pin configuration.
4. CD4028BE - BCD-to-decimal decoder, similar functionality.

These alternative models can be considered based on specific requirements and compatibility with existing circuit designs.

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