SN74HC257PW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: High-speed, CMOS logic, 4-to-1 multiplexer
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Combines four data inputs into one output line
• Packaging/Quantity: Available in reels of 2500 pieces

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: 10ns (typical)
• Maximum Quiescent Current: 8µA

Detailed Pin Configuration

The SN74HC257PW has a total of 16 pins. The pin configuration is as follows:

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

Functional Features

• 4-to-1 Data Selector/Multiplexer
• High-speed operation
• Low power consumption
• Wide supply voltage range
• Compatible with CMOS logic levels
• Schmitt-trigger input for noise immunity

Advantages and Disadvantages

Advantages: - Fast switching speed - Low power consumption - Wide supply voltage range allows for flexibility in different applications - Schmitt-trigger input provides noise immunity

Disadvantages: - Limited number of inputs and outputs (4-to-1 configuration) - Not suitable for applications requiring a larger number of inputs or outputs

Working Principles

The SN74HC257PW is a 4-to-1 multiplexer that combines four data inputs (A, B, C, D) into one output line (Y). The selection of the input to be routed to the output is controlled by the G inputs. When G is low, the corresponding data input is selected and appears at the output. When G is high, all inputs are disconnected from the output.

Detailed Application Field Plans

The SN74HC257PW can be used in various applications, including:

1. Data routing and selection in digital systems
2. Address decoding in memory systems
3. Input/output expansion in microcontrollers
4. Signal multiplexing in communication systems
5. Logic level conversion in mixed voltage systems

Detailed and Complete Alternative Models

Some alternative models to the SN74HC257PW include:

1. CD74HC257E: Similar 4-to-1 multiplexer with DIP package
2. MC74HC257N: 4-to-1 multiplexer with wider supply voltage range
3. SN74HCT257PW: 4-to-1 multiplexer with TTL logic compatibility

These alternative models offer similar functionality but may have differences in package type, supply voltage range, or logic compatibility.

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