CD74HCT251M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Multiplexer/Demultiplexer
• Characteristics: High-Speed CMOS Logic, 8-Channel, Non-Inverting
• Package: 16-Pin SOIC (Small Outline Integrated Circuit)
• Essence: Digital logic IC used for data selection and routing
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 15ns (typical)
• Maximum Quiescent Current: 4µA

Detailed Pin Configuration

The CD74HCT251M has a total of 16 pins, which are assigned as follows:

1. A0 - Data Input A0
2. A1 - Data Input A1
3. A2 - Data Input A2
4. A3 - Data Input A3
5. E - Enable Input
6. Y0 - Multiplexer Output Y0
7. Y1 - Multiplexer Output Y1
8. Y2 - Multiplexer Output Y2
9. Y3 - Multiplexer Output Y3
10. Y4 - Multiplexer Output Y4
11. Y5 - Multiplexer Output Y5
12. Y6 - Multiplexer Output Y6
13. Y7 - Multiplexer Output Y7
14. GND - Ground
15. VCC - Positive Power Supply
16. NC - No Connection

Functional Features

• 8-channel multiplexer/demultiplexer with non-inverting outputs
• Wide supply voltage range allows compatibility with various systems
• High-speed operation suitable for time-critical applications
• Low power consumption in standby mode (enable input low)
• Schmitt-trigger inputs for noise immunity

Advantages and Disadvantages

Advantages: - Versatile multiplexing/demultiplexing functionality - Wide supply voltage range for compatibility - High-speed operation for time-critical applications - Low power consumption in standby mode

Disadvantages: - Limited number of channels (8 channels) - Non-inverting outputs may not be suitable for all applications - Propagation delay time may affect timing-sensitive designs

Working Principles

The CD74HCT251M is a digital logic IC that functions as an 8-channel multiplexer/demultiplexer. It selects one of the eight data inputs (A0-A3) based on the binary value applied to the address inputs (A0-A2). The selected data is then routed to the corresponding output (Y0-Y7) when the enable input (E) is high. When the enable input is low, the outputs are in a high-impedance state.

Detailed Application Field Plans

The CD74HCT251M can be used in various applications, including:

1. Data routing and selection in microcontrollers and microprocessors
2. Address decoding in memory systems
3. Signal routing in communication systems
4. Input/output expansion in digital systems
5. Multiplexing/demultiplexing in data acquisition systems

Detailed and Complete Alternative Models

Some alternative models to the CD74HCT251M include:

1. SN74HCT251 - Similar 8-channel multiplexer/demultiplexer with non-inverting outputs, available in different package options.
2. CD4051 - 8-channel analog multiplexer/demultiplexer, suitable for both digital and analog signals.
3. CD74HC4067 - 16-channel analog multiplexer/demultiplexer with low ON resistance, ideal for high-frequency applications.

(Note: The above list is not exhaustive and there may be other alternative models available in the market.)

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