Texas Instruments
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SN74HC257NG4
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SN74HC257NG4

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Data Selector/Multiplexer
  • Characteristics: High-speed, CMOS technology
  • Package: DIP-16 (Dual In-line Package with 16 pins)
  • Essence: Logic gate IC for data selection and multiplexing
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

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: 9 ns (typical)
  • Maximum Operating Frequency: 50 MHz

Detailed Pin Configuration

The SN74HC257NG4 has a total of 16 pins. The pin configuration is as follows:

  1. A1 (Data Input A1)
  2. B1 (Data Input B1)
  3. A0 (Data Input A0)
  4. B0 (Data Input B0)
  5. G (Enable Input)
  6. Y0 (Multiplexer Output Y0)
  7. Y1 (Multiplexer Output Y1)
  8. Y2 (Multiplexer Output Y2)
  9. Y3 (Multiplexer Output Y3)
  10. VCC (Positive Power Supply)
  11. Y4 (Multiplexer Output Y4)
  12. Y5 (Multiplexer Output Y5)
  13. Y6 (Multiplexer Output Y6)
  14. Y7 (Multiplexer Output Y7)
  15. GND (Ground)
  16. OE (Output Enable Input)

Functional Features

  • 4-bit data selector/multiplexer
  • Selects one of the two 4-bit input data sets based on the control inputs
  • Enables easy switching between multiple data sources
  • High-speed operation suitable for time-critical applications
  • Low power consumption due to CMOS technology

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data selection and multiplexing - CMOS technology ensures low power consumption - Versatile functionality with multiple data inputs and outputs

Disadvantages: - Limited number of input and output pins restricts the size of data sets that can be handled - Requires external control signals for proper operation

Working Principles

The SN74HC257NG4 is a 4-bit data selector/multiplexer IC. It selects one of the two 4-bit input data sets based on the control inputs. The selected data set is then routed to the corresponding output pins. The enable input (G) and output enable input (OE) control the operation of the IC. When G is high, the IC is enabled, and the selected data is outputted. When OE is low, the outputs are disabled.

Detailed Application Field Plans

The SN74HC257NG4 is commonly used in various digital systems where data selection and multiplexing are required. Some application fields include:

  1. Data communication systems
  2. Digital signal processing
  3. Industrial automation
  4. Telecommunications equipment
  5. Consumer electronics

Detailed and Complete Alternative Models

  1. CD74HC257E - Similar 4-bit data selector/multiplexer IC from Texas Instruments
  2. MC74HC257N - 4-bit data selector/multiplexer IC from ON Semiconductor
  3. 74HC257D - 4-bit data selector/multiplexer IC from NXP Semiconductors
  4. SN54HC257J - 4-bit data selector/multiplexer IC from Texas Instruments

These alternative models offer similar functionality and can be used as replacements for the SN74HC257NG4 in various applications.

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Énumérez 10 questions et réponses courantes liées à l'application de SN74HC257NG4 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of SN74HC257NG4 in technical solutions:

  1. Q: What is SN74HC257NG4? A: SN74HC257NG4 is a quad 2-input multiplexer with 3-state outputs, commonly used in digital logic circuits.

  2. Q: What is the purpose of SN74HC257NG4? A: SN74HC257NG4 is used to select one of four data inputs and route it to a single output based on the control inputs.

  3. Q: What is the voltage range supported by SN74HC257NG4? A: SN74HC257NG4 supports a voltage range of 2V to 6V.

  4. Q: How many control inputs does SN74HC257NG4 have? A: SN74HC257NG4 has two control inputs, typically labeled as "A" and "B".

  5. Q: How many data inputs can SN74HC257NG4 handle? A: SN74HC257NG4 can handle four data inputs, labeled as D0, D1, D2, and D3.

  6. Q: Can SN74HC257NG4 be used for bidirectional data transmission? A: No, SN74HC257NG4 is a unidirectional multiplexer and does not support bidirectional data transmission.

  7. Q: What is the maximum operating frequency of SN74HC257NG4? A: The maximum operating frequency of SN74HC257NG4 is typically around 50 MHz.

  8. Q: Does SN74HC257NG4 have any internal pull-up or pull-down resistors? A: No, SN74HC257NG4 does not have any internal pull-up or pull-down resistors.

  9. Q: Can SN74HC257NG4 be cascaded to increase the number of inputs? A: Yes, multiple SN74HC257NG4 chips can be cascaded together to increase the number of inputs and outputs.

  10. Q: What is the power supply voltage required for SN74HC257NG4? A: SN74HC257NG4 requires a power supply voltage of 2V to 6V, typically provided by a regulated DC power source.

Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.