CD74HC147E

Product Overview

• Category: Integrated Circuit
• Use: Encoder/Decoder
• Characteristics: High-speed, CMOS logic, 10-line to 4-line priority encoder/decoder
• Package: DIP (Dual In-line Package)
• Essence: Converts 10-line input data into 4-line output data based on priority
• Packaging/Quantity: Available in tubes of 25 units or reels of 2,000 units

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature: -40°C to +85°C
• Propagation Delay: 21 ns (typical)
• Input Current: ±1µA (maximum)
• Output Current: ±25mA (maximum)

Pin Configuration

The CD74HC147E has a total of 16 pins. The pin configuration is as follows:

__ __ |01| |16| |02| |15| |03| |14| |04| |13| |05| |12| |06| |11| |07| |10| |08| |09| -- --

Functional Features

• Converts 10-line input data into 4-line output data
• Priority encoding ensures that the highest priority input is encoded first
• Decoding function allows for the identification of the active input line

Advantages and Disadvantages

Advantages

• High-speed operation enables quick encoding and decoding
• CMOS logic provides low power consumption
• Wide operating voltage range allows for versatile applications
• Compact DIP package facilitates easy integration into various circuits

Disadvantages

• Limited number of input and output lines restricts the range of applications
• Propagation delay may affect real-time applications with strict timing requirements

Working Principles

The CD74HC147E is a priority encoder/decoder integrated circuit. It operates by converting 10-line input data into 4-line output data based on priority. The highest priority input line is encoded first, ensuring that the most significant bit of the output corresponds to the active input line.

The device also features a decoding function, allowing for the identification of the active input line. This enables efficient data processing and routing in various applications.

Detailed Application Field Plans

The CD74HC147E finds application in various fields where encoding and decoding functions are required. Some potential application areas include:

1. Data transmission systems: Used to encode and decode data signals for efficient transmission and reception.
2. Address decoding: Enables efficient selection of memory or peripheral devices based on address inputs.
3. Priority-based control systems: Facilitates prioritization of tasks or events in control systems.
4. Multiplexing and demultiplexing: Allows for efficient routing of multiple signals through shared channels.
5. Error detection and correction: Utilized in error detection and correction schemes to identify and correct data errors.

Alternative Models

There are several alternative models available that offer similar functionality to the CD74HC147E. Some popular alternatives include:

1. 74LS148: TTL logic-based 8-line to 3-line priority encoder/decoder.
2. CD4028: CMOS logic-based BCD-to-decimal decoder.
3. SN74LS138: TTL logic-based 3-line to 8-line decoder/demultiplexer.

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

In conclusion, the CD74HC147E is a high-speed CMOS logic encoder/decoder integrated circuit. It offers efficient conversion of 10-line input data into 4-line output data based on priority. With its compact package and versatile applications, it is widely used in various fields requiring encoding and decoding functions.