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DM74ALS648NT

DM74ALS648NT

Product Overview

  • Category: Integrated Circuit
  • Use: Logic Level Translator
  • Characteristics: High-speed, TTL-compatible, 8-bit bidirectional translator
  • Package: DIP (Dual In-line Package)
  • Essence: Translates logic levels between two different voltage domains
  • Packaging/Quantity: Available in tubes of 25 units or reels of 1000 units

Specifications

  • Supply Voltage: 4.5V to 5.5V
  • Logic Voltage Levels: 2.0V to 5.5V
  • Input/Output Compatibility: TTL and CMOS
  • Propagation Delay: 6ns typical, 10ns maximum
  • Operating Temperature Range: -40°C to +85°C
  • Pin Count: 20 pins

Detailed Pin Configuration

  1. VCCB: Supply voltage for B side
  2. GND: Ground
  3. A0-A7: Input/output pins for A side
  4. OE: Output enable
  5. DIR: Direction control
  6. B0-B7: Input/output pins for B side
  7. VCCA: Supply voltage for A side

Functional Features

  • Bidirectional translation between two voltage domains
  • High-speed operation with TTL compatibility
  • Automatic direction control based on DIR pin
  • Output enable pin for tri-state output
  • Wide operating temperature range for versatile applications

Advantages

  • Allows seamless integration of components operating at different voltage levels
  • Fast propagation delay ensures minimal signal distortion
  • Supports both TTL and CMOS logic families
  • Simple pin configuration facilitates easy implementation

Disadvantages

  • Limited to 8-bit translation, may not be suitable for larger data buses
  • Requires external control signals for direction and output enable
  • Not suitable for applications requiring voltage translation beyond 5.5V

Working Principles

The DM74ALS648NT is a bidirectional logic level translator designed to facilitate communication between two different voltage domains. It operates by automatically translating the logic levels of signals from one side (A) to the other side (B) or vice versa, based on the direction control input (DIR). The output enable (OE) pin allows tri-state output, enabling multiple devices to share a common bus.

Detailed Application Field Plans

  • Microcontroller interfacing with peripherals operating at different voltage levels
  • Communication between systems using different logic families
  • Level shifting in mixed-signal circuits
  • Interface between legacy and modern components

Detailed and Complete Alternative Models

  1. SN74LVC4245A: Octal dual-supply translating transceiver
  2. TXS0108EPWR: 8-bit bidirectional voltage-level translator
  3. PCA9306DCUR: Dual bidirectional I2C-bus and SMBus voltage-level translator
  4. CD40109BE: Quad level-shifter with 3-state outputs
  5. 74LVC245APW: Octal bus transceiver with direction pin

These alternative models offer similar functionality and can be considered as alternatives to the DM74ALS648NT based on specific application requirements.

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Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi DM74ALS648NT dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of DM74ALS648NT in technical solutions:

  1. Q: What is DM74ALS648NT? A: DM74ALS648NT is a specific type of integrated circuit (IC) commonly used as a bus transceiver in digital systems.

  2. Q: What is the purpose of DM74ALS648NT? A: The purpose of DM74ALS648NT is to enable bidirectional data transfer between two buses with different voltage levels or signal characteristics.

  3. Q: What are the key features of DM74ALS648NT? A: Some key features include high-speed operation, low power consumption, compatibility with TTL logic levels, and support for bus arbitration.

  4. Q: How does DM74ALS648NT handle voltage level translation? A: DM74ALS648NT uses built-in level-shifting circuitry to convert signals between different voltage levels, allowing seamless communication between buses.

  5. Q: Can DM74ALS648NT be used in both parallel and serial communication systems? A: Yes, DM74ALS648NT can be used in both parallel and serial communication systems, depending on the specific application requirements.

  6. Q: What is the maximum data transfer rate supported by DM74ALS648NT? A: The maximum data transfer rate supported by DM74ALS648NT is typically in the range of several hundred megabits per second.

  7. Q: Does DM74ALS648NT require any external components for proper operation? A: Yes, DM74ALS648NT may require external resistors and capacitors for proper termination and noise filtering, depending on the system design.

  8. Q: Can DM74ALS648NT be cascaded to increase the number of bus lines? A: Yes, DM74ALS648NT can be cascaded to increase the number of bus lines by connecting multiple devices together.

  9. Q: Is DM74ALS648NT compatible with other logic families like CMOS or ECL? A: While DM74ALS648NT is primarily designed for compatibility with TTL logic levels, it can also interface with other logic families using appropriate level-shifting techniques.

  10. Q: What are some typical applications of DM74ALS648NT? A: Some typical applications include data communication between microprocessors, memory interfacing, bus arbitration in multiprocessor systems, and general-purpose digital signal transmission.