Texas Instruments
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SN74LV245APW
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SN74LV245APW

Product Overview

Category

SN74LV245APW belongs to the category of integrated circuits (ICs).

Use

It is commonly used as a bidirectional octal bus transceiver.

Characteristics

  • Low-voltage operation
  • High-speed performance
  • Wide operating voltage range
  • 3-state outputs
  • Overvoltage-tolerant inputs
  • ESD protection

Package

SN74LV245APW is available in a TSSOP (Thin Shrink Small Outline Package) package.

Essence

The essence of SN74LV245APW lies in its ability to facilitate bidirectional data transfer between two buses.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 2500 units per reel.

Specifications

  • Supply Voltage: 1.65V to 5.5V
  • Input Voltage Range: -0.5V to VCC + 0.5V
  • Output Voltage Range: -0.5V to VCC + 0.5V
  • Operating Temperature Range: -40°C to 85°C
  • Propagation Delay Time: 6.5ns (max)
  • Output Current: ±12mA

Detailed Pin Configuration

SN74LV245APW consists of 20 pins, each serving a specific function:

  1. DIR (Direction Control)
  2. OE (Output Enable)
  3. A1 (Input/Output)
  4. B1 (Input/Output)
  5. A2 (Input/Output)
  6. B2 (Input/Output)
  7. A3 (Input/Output)
  8. B3 (Input/Output)
  9. A4 (Input/Output)
  10. B4 (Input/Output)
  11. GND (Ground)
  12. B5 (Input/Output)
  13. A5 (Input/Output)
  14. B6 (Input/Output)
  15. A6 (Input/Output)
  16. B7 (Input/Output)
  17. A7 (Input/Output)
  18. B8 (Input/Output)
  19. A8 (Input/Output)
  20. VCC (Power Supply)

Functional Features

  • Bidirectional data transfer
  • Non-inverting outputs
  • 3-state outputs for bus isolation
  • Overvoltage-tolerant inputs for voltage translation

Advantages and Disadvantages

Advantages

  • Low-voltage operation allows compatibility with various systems
  • High-speed performance enables efficient data transfer
  • Wide operating voltage range provides flexibility in different applications
  • 3-state outputs allow for bus isolation and multiple device connections
  • ESD protection ensures reliability in harsh environments

Disadvantages

  • Limited number of input/output pins restricts the number of connected devices
  • Propagation delay time may affect real-time applications

Working Principles

SN74LV245APW operates by controlling the direction of data flow between two buses using the DIR pin. When DIR is set to logic high, data is transferred from A bus to B bus, and when DIR is set to logic low, data is transferred from B bus to A bus. The OE pin enables or disables the outputs, allowing the device to be tri-stated for bus isolation.

Detailed Application Field Plans

SN74LV245APW finds applications in various fields, including: 1. Microcontroller interfacing 2. Data communication systems 3. Industrial automation 4. Automotive electronics 5. Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that serve similar functions to SN74LV245APW are: 1. SN74LVC245A 2. MC74LVX245 3. CD74HCT245 4. 74HC245

These models offer similar features and can be used as substitutes depending on specific requirements.

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Énumérez 10 questions et réponses courantes liées à l'application de SN74LV245APW dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of SN74LV245APW:

  1. Q: What is SN74LV245APW? A: SN74LV245APW is a type of integrated circuit (IC) commonly used as a bus transceiver or level shifter in technical solutions.

  2. Q: What is the purpose of SN74LV245APW? A: The purpose of SN74LV245APW is to enable bidirectional voltage-level translation between different logic levels, allowing communication between devices operating at different voltage levels.

  3. Q: What voltage levels does SN74LV245APW support? A: SN74LV245APW supports voltage translation between low-voltage TTL (LVTTL) and low-voltage CMOS (LVCMOS) levels, typically between 3.3V and 5V.

  4. Q: How many channels does SN74LV245APW have? A: SN74LV245APW has 8 bidirectional channels, allowing for simultaneous translation of 8 signals.

  5. Q: Can SN74LV245APW be used with both inputs and outputs? A: Yes, SN74LV245APW can be used for both input and output voltage-level translation.

  6. Q: What is the maximum data rate supported by SN74LV245APW? A: SN74LV245APW can support data rates up to 100 MHz, making it suitable for high-speed applications.

  7. Q: Does SN74LV245APW require external pull-up or pull-down resistors? A: No, SN74LV245APW has built-in pull-up and pull-down resistors, eliminating the need for external components in most cases.

  8. Q: Can SN74LV245APW handle bus contention? A: Yes, SN74LV245APW has built-in bus-hold circuitry that prevents bus contention and reduces the possibility of data corruption.

  9. Q: What is the power supply voltage range for SN74LV245APW? A: SN74LV245APW operates with a power supply voltage range of 2V to 5.5V.

  10. Q: Can SN74LV245APW be used in both commercial and industrial applications? A: Yes, SN74LV245APW is suitable for use in both commercial and industrial applications due to its wide operating temperature range and robust design.

Please note that these answers are general and may vary depending on specific application requirements. It's always recommended to refer to the datasheet and consult the manufacturer for detailed information.