CD74HCT251EG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Multiplexer/Demultiplexer
• Characteristics: High-speed, CMOS logic, 8-channel multiplexer/demultiplexer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Logic IC for data routing and selection
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 13 ns (typical)
• Maximum Quiescent Current: 4µA at 5.5V
• Maximum Output Current: ±25mA

Detailed Pin Configuration

The CD74HCT251EG4 has a total of 16 pins, which are assigned as follows:

1. A0: Address Input 0
2. A1: Address Input 1
3. A2: Address Input 2
4. E: Enable Input
5. I0: Data Input 0
6. I1: Data Input 1
7. I2: Data Input 2
8. I3: Data Input 3
9. I4: Data Input 4
10. I5: Data Input 5
11. I6: Data Input 6
12. I7: Data Input 7
13. Y: Multiplexer/Demultiplexer Output
14. GND: Ground
15. NC: No Connection
16. VCC: Supply Voltage

Functional Features

• 8-channel multiplexer/demultiplexer with common select inputs (A0, A1, A2)
• Enable input (E) for controlling the operation
• High-speed CMOS logic for fast data routing and selection
• Low power consumption with a maximum quiescent current of 4µA at 5.5V
• Wide supply voltage range allows compatibility with various systems

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient data routing and selection - Low power consumption for energy-efficient applications - Wide supply voltage range provides flexibility in system integration - Compact SOIC package allows for space-saving PCB designs

Disadvantages: - Limited to 8 channels, may not be suitable for applications requiring more inputs/outputs - Propagation delay time may affect real-time applications with strict timing requirements

Working Principles

The CD74HCT251EG4 is a multiplexer/demultiplexer IC that routes or selects data from multiple inputs to a single output or vice versa. The address inputs (A0, A1, A2) determine which input is connected to the output. The enable input (E) controls the operation of the IC.

When the enable input is high, the selected input data is passed through to the output. When the enable input is low, the output is in a high-impedance state, isolating it from the inputs.

Detailed Application Field Plans

The CD74HCT251EG4 can be used in various applications, including:

1. Data communication systems: Multiplexing/demultiplexing data signals in communication networks.
2. Digital audio/video equipment: Selecting different audio/video sources for output.
3. Industrial automation: Routing control signals in automated systems.
4. Test and measurement instruments: Switching between different test signals for analysis.
5. Automotive electronics: Data routing and selection in automotive control systems.

Detailed and Complete Alternative Models

1. SN74HCT251: Similar 8-channel multiplexer/demultiplexer IC from Texas Instruments.
2. MC74HCT251: Equivalent CMOS logic IC from ON Semiconductor.
3. CD4051B: 8-channel analog multiplexer/demultiplexer IC from Texas Instruments.

These alternative models offer similar functionality and can be used as replacements for the CD74HCT251EG4 in various applications.

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