74HC257N,652

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: High-speed operation, low power consumption
• Package: DIP-16 (Dual In-line Package with 16 pins)
• Essence: A quad 2-input multiplexer with 3-state outputs
• Packaging/Quantity: Available in tape and reel packaging, quantity varies

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
• Propagation Delay Time: 15ns (typical)
• Maximum Quiescent Current: 4µA

Pin Configuration

The 74HC257N,652 IC has a total of 16 pins. The pin configuration is as follows:

1. GND (Ground)
2. A1 (Input A1)
3. B1 (Input B1)
4. Y1 (Output Y1)
5. A2 (Input A2)
6. B2 (Input B2)
7. Y2 (Output Y2)
8. G1 (Enable Gate 1)
9. G2 (Enable Gate 2)
10. Y3 (Output Y3)
11. A3 (Input A3)
12. B3 (Input B3)
13. Y4 (Output Y4)
14. OE (Output Enable)
15. VCC (Positive Power Supply)
16. NC (No Connection)

Functional Features

• Quad 2-input multiplexer: Allows selection between four different data inputs.
• 3-state outputs: Provides high impedance state when the output is not enabled.
• Enable Gates: Allows individual control over each multiplexer.

Advantages and Disadvantages

Advantages: - High-speed operation: Enables efficient data selection in time-critical applications. - Low power consumption: Helps conserve energy and extend battery life. - Versatile functionality: Can be used in various digital systems requiring data selection.

Disadvantages: - Limited number of inputs: Only supports four data inputs, which may not be sufficient for complex applications. - Lack of built-in protection features: Requires external circuitry to protect against voltage spikes or ESD events.

Working Principles

The 74HC257N,652 is a multiplexer IC that selects one of the four input signals based on the control inputs. The A and B inputs determine the selected data input, while the G1 and G2 enable gates control the output. When the output enable (OE) pin is low, the outputs are enabled, and the selected input is passed through. Conversely, when OE is high, the outputs enter a high impedance state.

Detailed Application Field Plans

The 74HC257N,652 can be utilized in various applications, including:

1. Data routing and selection in digital systems
2. Address decoding in microcontrollers and memory devices
3. Signal switching in communication systems
4. Multiplexing control signals in industrial automation
5. Logic level conversion in mixed-signal circuits

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74HC257N,652 include:

1. CD74HC257E: Similar quad 2-input multiplexer with 3-state outputs, available in DIP-16 package.
2. SN74HC257N: Quad 2-input multiplexer with 3-state outputs, available in DIP-16 package.
3. MC74HC257N: Quad 2-input multiplexer with 3-state outputs, available in DIP-16 package.

These alternative models can be considered based on specific requirements and availability.

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