MM74HC251SJ

Product Overview

• Category: Integrated Circuit
• Use: Data Selector/Multiplexer
• Characteristics: High-Speed, CMOS Logic, 8-Input Multiplexer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The MM74HC251SJ is a versatile data selector/multiplexer IC that allows the user to select one of eight inputs and route it to the output based on the control signals.
• Packaging/Quantity: The MM74HC251SJ is available in a standard SOIC package and is typically sold in reels of 2500 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: 15ns (typical)
• Input Capacitance: 3.5pF (typical)
• Output Current: ±25mA

Pin Configuration

The MM74HC251SJ has a total of 16 pins arranged as follows:

___________ | | A0 |1 16| Vcc A1 |2 15| Y A2 |3 14| GND A3 |4 13| I7 A4 |5 12| I6 A5 |6 11| I5 A6 |7 10| I4 A7 |8 9| I3 |___________|

Functional Features

• 8-input multiplexer with common select inputs (A0-A7)
• Single output (Y) that can be connected to any of the eight inputs (I0-I7) based on the control signals
• High-speed operation suitable for various applications
• CMOS logic ensures low power consumption and compatibility with a wide range of devices

Advantages and Disadvantages

Advantages

• Versatile data selector/multiplexer for complex circuit designs
• High-speed operation allows for efficient data routing
• Low power consumption due to CMOS technology
• Wide supply voltage range enables compatibility with different systems

Disadvantages

• Limited to 8 inputs, may not be suitable for applications requiring more input options
• Propagation delay of 15ns may introduce slight delays in time-critical applications

Working Principles

The MM74HC251SJ operates by using the select inputs (A0-A7) to determine which of the eight inputs (I0-I7) is connected to the output (Y). The control signals applied to the select inputs activate the corresponding transmission gates inside the IC, allowing the selected input to pass through to the output. The CMOS logic ensures low power consumption and high-speed operation.

Detailed Application Field Plans

The MM74HC251SJ can be used in various applications where data selection or multiplexing is required. Some potential application fields include:

1. Data acquisition systems
2. Communication equipment
3. Industrial automation
4. Instrumentation systems
5. Audio/video signal routing
6. Digital signal processing
7. Microcontroller-based systems

Detailed and Complete Alternative Models

1. CD4051B: 8-Channel Analog Multiplexer/Demultiplexer
2. SN74LS151: 8-Line to 1-Line Data Selector/Multiplexer
3. MC14051B: 8-Channel Analog Multiplexer/Demultiplexer
4. CD74HC4067: 16-Channel Analog Multiplexer/Demultiplexer
5. SN74HC157: Quad 2-Line to 1-Line Data Selector/Multiplexer

These alternative models offer similar functionality and can be considered as alternatives to the MM74HC251SJ based on specific requirements and design constraints.

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