CD74HC251E

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: High-Speed CMOS Logic, 8-Channel Multiplexer
• Package: DIP (Dual In-line Package)
• Essence: CD74HC251E is a multiplexer IC that allows the selection of one out of eight data inputs and routes it to a single output.
• Packaging/Quantity: Available in tubes or reels, with varying quantities depending on the supplier.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC (High-Speed CMOS)
• Number of Inputs: 8
• Number of Outputs: 1
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 14 ns (typical)
• Output Current: ±25 mA
• Input Capacitance: 3.5 pF (typical)

Pin Configuration

The CD74HC251E has a total of 16 pins arranged as follows:

+-----+ A0 -|1 16|- VCC A1 -|2 15|- Y A2 -|3 14|- GND A3 -|4 13|- S0 A4 -|5 12|- S1 A5 -|6 11|- S2 A6 -|7 10|- S3 A7 -|8 9|- E +-----+

Functional Features

• CD74HC251E is designed to provide high-speed data selection and routing capabilities.
• It offers a wide supply voltage range, making it suitable for various applications.
• The multiplexer has a low power consumption, making it energy-efficient.
• It provides a single output that can be selected from eight different data inputs.
• The IC has a compact DIP package, allowing for easy integration into electronic circuits.

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient data selection. - Wide supply voltage range enhances versatility. - Low power consumption contributes to energy efficiency. - Compact package facilitates integration into circuits.

Disadvantages: - Limited number of outputs may restrict certain applications. - Propagation delay may affect real-time data processing in some cases.

Working Principles

CD74HC251E operates based on the principles of digital multiplexing. It uses control signals (S0-S3) to select one of the eight data inputs (A0-A7) and routes it to the output pin (Y). The enable signal (E) determines whether the multiplexer is active or in a high-impedance state.

Detailed Application Field Plans

CD74HC251E finds applications in various fields, including:

1. Digital Communication Systems: Used for data routing and selection in communication protocols.
2. Industrial Automation: Enables efficient data selection in control systems.
3. Instrumentation: Utilized for signal routing and selection in measurement devices.
4. Consumer Electronics: Integrated into audio/video equipment for input/output selection.
5. Automotive Electronics: Employed in vehicle control systems for data routing.

Alternative Models

Several alternative models with similar functionality are available in the market. Some notable alternatives to CD74HC251E include:

1. SN74HC251N by Texas Instruments
2. MC74HC251N by ON Semiconductor
3. 74HC251 by NXP Semiconductors

These alternatives offer comparable features and can be considered as replacements for CD74HC251E based on specific requirements.

In conclusion, CD74HC251E is a high-speed CMOS logic IC that serves as an 8-channel multiplexer. It offers efficient data selection and routing capabilities, making it suitable for various applications in digital communication systems, industrial automation, instrumentation, consumer electronics, and automotive electronics. While it has advantages such as high-speed operation and low power consumption, its limitations include a limited number of outputs and propagation delay. Alternative models from different manufacturers provide similar functionality and can be considered as substitutes.