MC74HC251ADR2G

Product Overview

• Category: Integrated Circuit
• Use: Data Selector/Multiplexer
• Characteristics: High-Speed, CMOS Logic, 8:1 Multiplexer
• Package: SOIC-16
• Essence: The MC74HC251ADR2G is a high-speed CMOS logic integrated circuit that functions as an 8:1 multiplexer. It is commonly used in digital systems to select one of eight input signals and route it to the output based on control inputs.
• Packaging/Quantity: The MC74HC251ADR2G is available in a SOIC-16 package and is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC
• Number of Inputs: 8
• Number of Control Inputs: 3
• Propagation Delay: 13 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MC74HC251ADR2G has a total of 16 pins arranged in a SOIC package. The pin configuration is as follows:

__ __ A0 |1 `--' 16| Vcc A1 |2 15| Y A2 |3 14| S0 GND |4 13| S1 B0 |5 12| S2 B1 |6 11| I7 B2 |7 10| I6 OE |8 9| I5 ``````````

Functional Features

• The MC74HC251ADR2G is designed to operate at high speeds, making it suitable for applications that require fast data selection.
• It has a wide supply voltage range of 2V to 6V, allowing flexibility in various digital systems.
• The device features three control inputs (S0, S1, and S2) that determine the selected input signal.
• The output (Y) is determined by the combination of control inputs and the corresponding input signal.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data selection in time-critical applications.
• Wide supply voltage range allows compatibility with different digital systems.
• Compact SOIC package provides ease of integration into circuit designs.
• Low power consumption makes it suitable for battery-powered devices.

Disadvantages

• Limited number of input signals (8) may not be sufficient for certain complex applications.
• Propagation delay of 13 ns (typical) may introduce latency in time-sensitive systems.
• Lack of built-in protection features against electrical faults or ESD events.

Working Principles

The MC74HC251ADR2G operates based on the principle of multiplexing. It selects one of the eight input signals based on the control inputs (S0, S1, and S2) and routes it to the output pin (Y). The selected input signal is determined by the binary combination of the control inputs.

Detailed Application Field Plans

The MC74HC251ADR2G can be used in various applications, including:

1. Data routing in digital communication systems.
2. Address decoding in microcontrollers and memory systems.
3. Signal selection in audio/video equipment.
4. Multiplexing control in industrial automation systems.
5. Input selection in test and measurement instruments.

Detailed and Complete Alternative Models

1. CD74HC251E: Similar 8:1 multiplexer IC from Texas Instruments.
2. SN74HC251N: 8:1 multiplexer IC with similar specifications from Texas Instruments.
3. 74HC251D: 8:1 multiplexer IC in SOIC package from Nexperia.

These alternative models offer similar functionality and can be used as replacements for the MC74HC251ADR2G based on specific requirements and availability.

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