74HCT257N,652

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: High-speed operation, low power consumption, wide operating voltage range
• Package: DIP-16 (Dual In-line Package with 16 pins)
• Essence: Logic IC for digital data selection and multiplexing
• Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

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 +125°C
• Maximum Propagation Delay: 25 ns
• Maximum Quiescent Current: 4 µA

Detailed Pin Configuration

1. A Input 1
2. B Input 2
3. C Input 3
4. D Input 4
5. GND (Ground)
6. Y Output
7. OE (Output Enable)
8. S (Select)
9. GND (Ground)
10. Y Output
11. OE (Output Enable)
12. S (Select)
13. GND (Ground)
14. Y Output
15. OE (Output Enable)
16. VCC (Supply Voltage)

Functional Features

• 74HCT257N,652 is a quad 2-input multiplexer with 3-state outputs.
• It allows the selection of one of the four data inputs and routes it to the output.
• The selection is controlled by the S (Select) input.
• The OE (Output Enable) input enables or disables the outputs.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data selection and multiplexing. - Low power consumption makes it suitable for battery-powered devices. - Wide operating voltage range provides flexibility in various applications.

Disadvantages: - Limited number of inputs (4) may not be sufficient for complex systems requiring more data sources. - DIP-16 package may not be suitable for space-constrained designs.

Working Principles

• When the S input is low, the Y output follows the corresponding data input (A, B, C, or D).
• When the S input is high, the Y output is in a high-impedance state (disconnected).
• The OE input must be low to enable the outputs. When OE is high, the outputs are disabled.

Detailed Application Field Plans

• Data selection and multiplexing in digital systems.
• Address decoding in memory systems.
• Input/output expansion in microcontroller-based systems.
• Signal routing in communication systems.

Detailed and Complete Alternative Models

• CD74HCT257E: Similar quad 2-input multiplexer with 3-state outputs, available in PDIP-16 package.
• SN74HCT257N: Quad 2-input multiplexer with 3-state outputs, available in DIP-16 package.
• MC74HCT257AN: Quad 2-input multiplexer with 3-state outputs, available in DIP-16 package.

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