SN74HC251N

Product Overview

Category

SN74HC251N belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for data multiplexing and demultiplexing applications.

Characteristics

• High-speed operation
• Wide operating voltage range
• Low power consumption
• Schmitt-trigger inputs for noise immunity
• Compatible with TTL and CMOS logic levels

Package

SN74HC251N is available in a 16-pin DIP (Dual In-line Package) format.

Essence

The essence of SN74HC251N lies in its ability to efficiently multiplex and demultiplex data signals.

Packaging/Quantity

SN74HC251N is typically packaged in tubes or reels, with quantities varying based on customer requirements.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay: 14 ns
• Maximum Quiescent Current: 4 µA

Detailed Pin Configuration

1. A0: Data input A0
2. A1: Data input A1
3. A2: Data input A2
4. GND: Ground
5. B: Data input B
6. C: Data input C
7. Y0: Multiplexer output Y0
8. Y1: Multiplexer output Y1
9. Y2: Multiplexer output Y2
10. Y3: Multiplexer output Y3
11. E: Enable input
12. VCC: Positive supply voltage
13. S0: Select input S0
14. S1: Select input S1
15. S2: Select input S2
16. NC: No connection

Functional Features

• 3-to-1 data multiplexer/demultiplexer
• Select inputs for choosing the desired operation mode
• Enable input for controlling the output state
• Schmitt-trigger inputs for improved noise immunity
• High-speed operation for efficient data processing

Advantages and Disadvantages

Advantages

• Versatile IC suitable for both multiplexing and demultiplexing applications
• Wide operating voltage range allows compatibility with various systems
• Low power consumption for energy-efficient designs
• Schmitt-trigger inputs provide robustness against noise

Disadvantages

• Limited number of data inputs and outputs
• Propagation delay may affect real-time applications

Working Principles

SN74HC251N operates as a 3-to-1 multiplexer or demultiplexer depending on the select inputs (S0, S1, S2) and enable input (E). When used as a multiplexer, the data inputs (A0, A1, A2) are selected based on the select inputs, and the chosen data is presented at the corresponding output (Y0, Y1, Y2, Y3). In demultiplexer mode, the data input (B, C) is routed to one of the four outputs based on the select inputs.

Detailed Application Field Plans

SN74HC251N finds applications in various fields, including: - Data communication systems - Digital signal processing - Industrial automation - Consumer electronics - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to SN74HC251N are: - CD4051B: 8-channel analog multiplexer/demultiplexer - 74HC151: 8-input multiplexer - SN74LS138: 3-line to 8-line decoder/demultiplexer - CD74HC4067: 16-channel analog multiplexer/demultiplexer

These alternative models offer similar functionality and can be chosen based on specific requirements.

Word count: 438 words