MM74HC251N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: High-Speed, CMOS Logic, 8-Channel, Non-Inverting
• Package: DIP (Dual In-Line Package)
• Essence: The MM74HC251N is a multiplexer IC that allows the selection of one out of eight data inputs and routes it to a single output.
• Packaging/Quantity: The MM74HC251N is typically sold in packs of 25 units.

Specifications

• Logic Family: HC (High-Speed CMOS)
• Number of Channels: 8
• Input Voltage: 2V - 6V
• Output Voltage: 0V - Vcc
• Propagation Delay: 15ns (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MM74HC251N has a total of 16 pins. Here is the detailed pin configuration:

1. A0: Data Input 0
2. A1: Data Input 1
3. A2: Data Input 2
4. A3: Data Input 3
5. A4: Data Input 4
6. A5: Data Input 5
7. A6: Data Input 6
8. A7: Data Input 7
9. GND: Ground
10. Y: Output
11. S0: Select Input 0
12. S1: Select Input 1
13. OE: Output Enable
14. Vcc: Power Supply
15. NC: No Connection
16. NC: No Connection

Functional Features

• The MM74HC251N features non-inverting outputs, which means the selected data input is directly passed to the output without any inversion.
• It has a wide operating voltage range, allowing it to work with various power supply levels.
• The IC has a fast propagation delay, making it suitable for high-speed applications.

Advantages and Disadvantages

Advantages

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Non-inverting outputs

Disadvantages

• Limited number of channels (8)
• Not suitable for applications requiring more than 8 inputs

Working Principles

The MM74HC251N works based on the principle of multiplexing. It uses the select inputs (S0 and S1) to determine which data input (A0-A7) should be routed to the output (Y). The output enable (OE) pin is used to enable or disable the output.

Detailed Application Field Plans

The MM74HC251N can be used in various applications that require data selection or multiplexing. Some potential application fields include:

1. Data acquisition systems
2. Communication systems
3. Industrial automation
4. Audio/video equipment
5. Instrumentation

Detailed and Complete Alternative Models

If the MM74HC251N does not meet specific requirements, here are some alternative models that can be considered:

1. CD4051B: 8-Channel Analog Multiplexer/Demultiplexer
2. SN74LS151: 8-Line to 1-Line Data Selector/Multiplexer
3. MC14051B: 8-Channel Analog Multiplexer/Demultiplexer

These alternative models offer similar functionality but may have different characteristics or package options.

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