Encyclopedia Entry: 74HCT251PW-Q100J

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Multiplexer/Demultiplexer
• Characteristics: High-speed, CMOS logic, low power consumption
• Package: TSSOP-16 (Thin Shrink Small Outline Package)
• Essence: The 74HCT251PW-Q100J is a multiplexer/demultiplexer IC that allows digital signals to be routed between multiple inputs and outputs.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Logic Family: HCT
• Number of Inputs: 8
• Number of Outputs: 1
• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +125°C
• Propagation Delay: 11 ns (typical)
• Output Current: ±6 mA
• Input Capacitance: 3.5 pF (typical)

Detailed Pin Configuration

The 74HCT251PW-Q100J has a total of 16 pins arranged as follows:

__ __ A1 | 1 16 | VCC B1 | 2 15 | Y A2 | 3 14 | GND B2 | 4 13 | I0 A3 | 5 12 | I1 B3 | 6 11 | I2 A4 | 7 10 | I3 B4 | 8 9 | E ¯¯ ¯¯

Functional Features

• The 74HCT251PW-Q100J is a 3-state multiplexer/demultiplexer IC that can select one of eight inputs and route it to the output.
• It operates on CMOS logic, providing high-speed performance while consuming low power.
• The 3-state outputs allow multiple devices to be connected together without interference.

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient data routing. - Low power consumption makes it suitable for battery-powered applications. - 3-state outputs facilitate bus sharing and reduce signal conflicts.

Disadvantages: - Limited number of inputs and outputs may not be suitable for complex systems requiring more channels. - Propagation delay may introduce timing issues in certain applications.

Working Principles

The 74HCT251PW-Q100J functions as a multiplexer or demultiplexer by selecting one of the eight inputs based on the control input (E) and routing it to the output pin (Y). When E is low, the device operates as a multiplexer, and when E is high, it functions as a demultiplexer. The selected input is determined by the combination of address inputs (A1-A4) and data inputs (B1-B4).

Detailed Application Field Plans

The 74HCT251PW-Q100J finds applications in various digital systems where data routing and selection are required. Some potential application fields include: 1. Data communication systems 2. Telecommunication equipment 3. Industrial automation 4. Automotive electronics 5. Consumer electronics

Detailed and Complete Alternative Models

1. SN74HCT251N - DIP-16 package, similar specifications
2. CD74HCT251E - PDIP-16 package, similar specifications
3. MC74HCT251N - DIP-16 package, similar specifications
4. 74HCT251D - SOIC-16 package, similar specifications

These alternative models offer similar functionality and can be used as substitutes for the 74HCT251PW-Q100J in various applications.

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