CD74HCT257MT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: High-Speed, CMOS Logic, 4-to-1 Multiplexer
• Package: TSSOP-16
• Essence: CD74HCT257MT is a multiplexer IC that allows the selection of one out of four data inputs to be routed to a single output.
• Packaging/Quantity: The CD74HCT257MT is typically sold in reels or tubes containing 250 units.

Specifications

• Logic Family: HCT
• Number of Inputs: 4
• Number of Outputs: 1
• Supply Voltage Range: 2V to 6V
• Propagation Delay Time: 15 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HCT257MT has a total of 16 pins. The pin configuration is as follows:

1. A0: Data Input 0
2. A1: Data Input 1
3. A2: Data Input 2
4. A3: Data Input 3
5. GND: Ground
6. Y: Output
7. E: Enable Input
8. B: Select Input
9. C: Select Input
10. D: Select Input
11. VCC: Supply Voltage
12. NC: No Connection
13. NC: No Connection
14. NC: No Connection
15. NC: No Connection
16. NC: No Connection

Functional Features

• 4-to-1 multiplexer with common select inputs (B, C, D) and enable input (E).
• Allows selection of one out of four data inputs (A0, A1, A2, A3) to be routed to the output (Y).
• High-speed operation suitable for various applications.
• CMOS logic ensures low power consumption and compatibility with a wide range of devices.

Advantages and Disadvantages

Advantages: - Fast switching speed allows for efficient data selection. - Low power consumption due to CMOS technology. - Wide supply voltage range enables compatibility with different systems. - Compact TSSOP-16 package saves board space.

Disadvantages: - Limited number of inputs and outputs restricts its use in complex systems. - Propagation delay may affect timing-sensitive applications.

Working Principles

The CD74HCT257MT operates as a 4-to-1 multiplexer. The select inputs (B, C, D) determine which data input (A0, A1, A2, A3) is connected to the output (Y). The enable input (E) controls the overall operation of the IC. When E is high, the multiplexer is enabled, and the selected data input is passed to the output. When E is low, the output is in a high-impedance state.

Detailed Application Field Plans

The CD74HCT257MT can be used in various applications, including:

1. Data routing and selection in digital systems.
2. Address decoding in memory systems.
3. Input selection in audio/video equipment.
4. Multiplexing control signals in communication systems.
5. Logic level translation between different voltage domains.

Detailed and Complete Alternative Models

Some alternative models that serve similar functions to CD74HCT257MT are:

1. SN74HC157: Quad 2-to-1 Data Selector/Multiplexer
2. CD4052: Dual 4-channel Analog Multiplexer/Demultiplexer
3. MC14051: 8-channel Analog Multiplexer/Demultiplexer
4. 74HC4051: Single 8-channel Analog Multiplexer/Demultiplexer

These alternative models offer different features and pin configurations, providing flexibility for specific application requirements.

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