Texas Instruments
Obrázek může být reprezentace.
Viz Specifikace pro podrobnosti o produktu.
SN74LVC244APWR
Zobrazit detail DataSheets

SN74LVC244APWR

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Buffer/Line Driver
  • Characteristics: Low Voltage, CMOS Technology
  • Package: TSSOP-20
  • Essence: High-Speed Logic Level Shifter
  • Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

  • Supply Voltage Range: 1.65V to 5.5V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Maximum Operating Frequency: 80MHz
  • Number of Channels: 8
  • Input/Output Type: Non-Inverting
  • Propagation Delay: 3.8ns (typical)
  • Output Drive Capability: ±24mA

Detailed Pin Configuration

The SN74LVC244APWR has a TSSOP-20 package with the following pin configuration:

__ __ A1 | 1 20 | VCC B1 | 2 19 | OE# A2 | 3 18 | I/O1 B2 | 4 17 | I/O2 A3 | 5 16 | I/O3 B3 | 6 15 | I/O4 A4 | 7 14 | GND B4 | 8 13 | I/O5 A5 | 9 12 | I/O6 B5 |10 11 | I/O7 ‾‾ ‾‾

Functional Features

  • High-Speed Logic Level Shifting: The SN74LVC244APWR is designed to shift logic levels from one voltage domain to another, making it suitable for interfacing between different voltage systems.
  • Non-Inverting Buffer: The IC provides non-inverting buffer functionality, ensuring that the output signal matches the input signal polarity.
  • Wide Supply Voltage Range: With a supply voltage range of 1.65V to 5.5V, the SN74LVC244APWR can be used in various low-voltage applications.
  • Low Propagation Delay: The IC offers a typical propagation delay of 3.8ns, enabling fast signal transmission.

Advantages and Disadvantages

Advantages

  • High-speed logic level shifting capability
  • Non-inverting buffer ensures signal integrity
  • Wide supply voltage range allows for versatile usage
  • Low propagation delay enables fast signal transmission

Disadvantages

  • Limited number of channels (8)
  • Requires external control signal (OE#) for enabling/disabling the outputs

Working Principles

The SN74LVC244APWR operates based on complementary metal-oxide-semiconductor (CMOS) technology. It utilizes a combination of MOSFETs to achieve high-speed logic level shifting. When an input signal is applied, the IC amplifies and buffers it, producing an output signal with the same polarity as the input. The OE# pin controls the enable/disable function of the outputs.

Detailed Application Field Plans

The SN74LVC244APWR finds applications in various fields, including:

  1. Microcontroller Interfacing: It can be used to interface microcontrollers operating at different voltage levels.
  2. Communication Systems: The IC facilitates level shifting between different communication protocols, such as UART, SPI, and I2C.
  3. Sensor Interfaces: It enables connection between sensors operating at different voltage ranges and microcontrollers or data acquisition systems.
  4. Industrial Automation: The IC can be employed in industrial automation systems for signal conditioning and level translation purposes.

Detailed and Complete Alternative Models

  1. SN74LVC244A: Similar to SN74LVC244APWR, but available in different package options (e.g., SOIC, PDIP).
  2. 74LVC244: Equivalent IC from a different manufacturer, offering similar specifications and functionality.
  3. MC74LVC244: Another alternative with comparable features, manufactured by a different company.

(Note: This is not an exhaustive list of alternative models; it is recommended to refer to the manufacturer's datasheets for a comprehensive list.)

Word count: 437 words

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací SN74LVC244APWR v technických řešeních

Sure! Here are 10 common questions and answers related to the application of SN74LVC244APWR:

  1. Q: What is SN74LVC244APWR? A: SN74LVC244APWR is a non-inverting octal buffer and line driver with 3-state outputs, commonly used in digital logic applications.

  2. Q: What is the operating voltage range for SN74LVC244APWR? A: The operating voltage range for SN74LVC244APWR is typically between 1.65V and 5.5V.

  3. Q: What is the maximum output current that SN74LVC244APWR can drive? A: SN74LVC244APWR can drive up to 32mA of output current per channel.

  4. Q: Can SN74LVC244APWR be used as a level shifter? A: Yes, SN74LVC244APWR can be used as a level shifter to convert signals between different voltage levels.

  5. Q: How many channels does SN74LVC244APWR have? A: SN74LVC244APWR has 8 channels, allowing it to buffer or drive up to 8 separate signals.

  6. Q: What is the propagation delay of SN74LVC244APWR? A: The propagation delay of SN74LVC244APWR is typically around 4.3ns.

  7. Q: Can SN74LVC244APWR be used in high-speed applications? A: Yes, SN74LVC244APWR is designed for high-speed operation and can be used in applications with fast switching requirements.

  8. Q: Is SN74LVC244APWR compatible with both CMOS and TTL logic levels? A: Yes, SN74LVC244APWR is compatible with both CMOS and TTL logic levels, making it versatile for various applications.

  9. Q: Can SN74LVC244APWR be used in bidirectional data transfer applications? A: No, SN74LVC244APWR is a unidirectional buffer and line driver, not suitable for bidirectional data transfer.

  10. Q: What is the package type of SN74LVC244APWR? A: SN74LVC244APWR is available in a TSSOP-20 package, which is compact and suitable for space-constrained designs.

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