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DM74AS648NT
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DM74AS648NT

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Data Multiplexer
  • Characteristics: High-speed, TTL compatible, 8:1 multiplexer
  • Package: DIP (Dual In-line Package)
  • Essence: The DM74AS648NT is a high-performance data multiplexer designed for use in various digital applications.
  • Packaging/Quantity: Available in tubes or reels, with quantities varying based on customer requirements.

Specifications

  • Supply Voltage: 4.5V to 5.5V
  • Input Voltage: 0V to VCC
  • Output Voltage: 0V to VCC
  • Operating Temperature: -40°C to +85°C
  • Propagation Delay: 10ns (typical)
  • Input Capacitance: 10pF (typical)
  • Output Current: ±24mA (maximum)

Pin Configuration

The DM74AS648NT has a total of 20 pins, which are assigned specific functions as follows:

| Pin No. | Name | Function | |---------|------|----------| | 1 | A0 | Input A0 | | 2 | A1 | Input A1 | | 3 | A2 | Input A2 | | 4 | A3 | Input A3 | | 5 | A4 | Input A4 | | 6 | A5 | Input A5 | | 7 | A6 | Input A6 | | 8 | A7 | Input A7 | | 9 | G | Enable Input | | 10 | Y | Output Y | | 11-18 | B0-B7 | Input B0-B7 | | 19 | VCC | Positive Power Supply | | 20 | GND | Ground |

Functional Features

  • High-speed operation: The DM74AS648NT is designed to operate at high speeds, making it suitable for applications that require fast data processing.
  • TTL compatibility: This IC is compatible with TTL logic levels, allowing seamless integration with existing TTL-based systems.
  • Multiplexing capability: The device can select one of eight input lines and route it to the output line based on the control inputs.
  • Enable input: The enable input (G) allows the user to activate or deactivate the multiplexer as needed.

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient data processing. - TTL compatibility ensures easy integration with existing systems. - Multiplexing capability provides flexibility in data routing. - Enable input allows for selective activation of the multiplexer.

Disadvantages: - Limited to 8:1 multiplexing, may not be suitable for applications requiring higher input line selection.

Working Principles

The DM74AS648NT operates by selecting one of the eight input lines (B0-B7) based on the binary address inputs (A0-A7). The selected input is then routed to the output line (Y). The enable input (G) controls the activation of the multiplexer. When G is low, the multiplexer is disabled, and the output remains in a high-impedance state.

Detailed Application Field Plans

The DM74AS648NT finds applications in various digital systems, including but not limited to:

  1. Data communication systems
  2. Microprocessor-based systems
  3. Industrial automation
  4. Test and measurement equipment
  5. Telecommunications

Alternative Models

Below are some alternative models that offer similar functionality to the DM74AS648NT:

  1. SN74AS648: Texas Instruments
  2. MC74AS648: ON Semiconductor
  3. CD74AS648: Texas Instruments
  4. 74F648: Fairchild Semiconductor

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

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Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi DM74AS648NT dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of DM74AS648NT in technical solutions:

  1. Q: What is DM74AS648NT? A: DM74AS648NT is a specific type of integrated circuit (IC) commonly used as a bus transceiver in digital systems.

  2. Q: What is the purpose of DM74AS648NT? A: The purpose of DM74AS648NT is to enable bidirectional data transfer between two buses with different voltage levels or signal formats.

  3. Q: What voltage levels does DM74AS648NT support? A: DM74AS648NT supports TTL (Transistor-Transistor Logic) voltage levels, typically 5V.

  4. Q: Can DM74AS648NT be used in both directions simultaneously? A: Yes, DM74AS648NT can be used for bidirectional data transfer, allowing simultaneous communication in both directions.

  5. Q: How many data lines can DM74AS648NT handle? A: DM74AS648NT can handle up to 8 data lines, making it suitable for applications requiring parallel data transfer.

  6. Q: Does DM74AS648NT require external components for operation? A: Yes, DM74AS648NT requires external pull-up resistors and decoupling capacitors for proper operation.

  7. Q: What is the maximum operating frequency of DM74AS648NT? A: The maximum operating frequency of DM74AS648NT is typically around 25 MHz.

  8. Q: Can DM74AS648NT be cascaded to increase the number of data lines? A: Yes, multiple DM74AS648NT ICs can be cascaded together to increase the number of data lines in a system.

  9. Q: What are the typical applications of DM74AS648NT? A: DM74AS648NT is commonly used in microprocessor systems, memory interfaces, and other digital communication systems.

  10. Q: Are there any alternative ICs to DM74AS648NT for bus transceiver applications? A: Yes, there are alternative ICs available from different manufacturers, such as 74HC648 or SN74LVTH648, which offer similar functionality.

Please note that the specific details and characteristics of DM74AS648NT may vary, so it's always recommended to refer to the datasheet provided by the manufacturer for accurate information.