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SN74ALVCH245DW
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SN74ALVCH245DW

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Level Shifter and Bus Transceiver
  • Characteristics: Bi-directional voltage level translation between different logic levels, high-speed operation, low power consumption
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: The SN74ALVCH245DW is a 8-bit bus transceiver that provides voltage level translation between a 3.3V and 5V bus. It allows bidirectional communication between devices operating at different voltage levels.
  • Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

  • Supply Voltage Range: 1.65V to 3.6V
  • High-Level Input Voltage: 2.3V to VCC + 0.3V
  • Low-Level Input Voltage: -0.3V to 0.8V
  • High-Level Output Voltage: 2.4V (minimum) at IOH = -12mA
  • Low-Level Output Voltage: 0.4V (maximum) at IOL = 24mA
  • Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The SN74ALVCH245DW has a total of 20 pins, which are assigned as follows:

  1. OE (Output Enable) - Active LOW output enable input
  2. DIR (Direction Control) - Direction control input
  3. A1 - Data input/output pin 1
  4. B1 - Data input/output pin 2
  5. A2 - Data input/output pin 3
  6. B2 - Data input/output pin 4
  7. A3 - Data input/output pin 5
  8. B3 - Data input/output pin 6
  9. A4 - Data input/output pin 7
  10. B4 - Data input/output pin 8
  11. GND (Ground) - Ground reference
  12. B5 - Data input/output pin 9
  13. A5 - Data input/output pin 10
  14. B6 - Data input/output pin 11
  15. A6 - Data input/output pin 12
  16. B7 - Data input/output pin 13
  17. A7 - Data input/output pin 14
  18. B8 - Data input/output pin 15
  19. A8 - Data input/output pin 16
  20. VCC (Supply Voltage) - Positive supply voltage

Functional Features

  • Bidirectional voltage level translation between 3.3V and 5V buses
  • Supports both push-pull and open-drain outputs
  • High-speed operation with minimal propagation delay
  • Low power consumption, making it suitable for battery-powered devices
  • ESD protection on all pins to prevent damage from electrostatic discharge

Advantages and Disadvantages

Advantages: - Enables communication between devices operating at different voltage levels - Provides flexibility in designing systems with mixed voltage components - Fast switching speed allows for efficient data transfer - Low power consumption helps extend battery life in portable devices

Disadvantages: - May require additional external components for proper voltage translation in certain applications - Limited to translating between 3.3V and 5V logic levels, not suitable for other voltage ranges

Working Principles

The SN74ALVCH245DW operates by using a combination of MOSFETs and control circuitry to perform the voltage level translation. When the DIR pin is set to a specific logic level, the device determines the direction of data flow between the A and B ports. The OE pin controls the output enable function, allowing the device to be enabled or disabled as needed.

Detailed Application Field Plans

The SN74ALVCH245DW is commonly used in various applications, including:

  1. Interfacing between microcontrollers and peripheral devices operating at different voltage levels
  2. Level shifting in communication interfaces such as UART, SPI, and I2C
  3. Bus transceiver for data transfer between different logic families
  4. Voltage level translation in mixed-voltage systems, such as industrial automation and automotive electronics

Detailed and Complete Alternative Models

  • SN74LVC245A: 8-bit bus transceiver with similar functionality but operates at a lower voltage range (1.65V to 3.6V)
  • SN74HCT245: 8-bit bus transceiver compatible with TTL logic levels (5V)
  • SN74LVCC3245A: 8-bit dual-supply bus transceiver with voltage level translation capability

These alternative models offer similar functionality to the SN74ALVCH245DW but may have different voltage ranges or additional features depending on the specific application requirements.

In conclusion, the SN74ALVCH245DW is a versatile integrated circuit that enables bidirectional voltage level

Maglista ng 10 karaniwang tanong at sagot na nauugnay sa aplikasyon ng SN74ALVCH245DW sa mga teknikal na solusyon

Sure! Here are 10 common questions and answers related to the application of SN74ALVCH245DW:

  1. Q: What is SN74ALVCH245DW? A: SN74ALVCH245DW is a bidirectional octal bus transceiver with 3-state outputs, commonly used for level shifting and signal buffering in digital systems.

  2. Q: What is the operating voltage range of SN74ALVCH245DW? A: SN74ALVCH245DW operates within a voltage range of 1.65V to 3.6V.

  3. Q: How many channels does SN74ALVCH245DW have? A: SN74ALVCH245DW has 8 channels, allowing bidirectional data transfer between two buses.

  4. Q: What is the maximum data transfer rate supported by SN74ALVCH245DW? A: SN74ALVCH245DW supports data transfer rates up to 400 Mbps.

  5. Q: Can SN74ALVCH245DW handle both push-pull and open-drain configurations? A: Yes, SN74ALVCH245DW can be configured for either push-pull or open-drain operation, depending on the system requirements.

  6. Q: Does SN74ALVCH245DW have built-in ESD protection? A: Yes, SN74ALVCH245DW provides ESD protection on all pins, making it suitable for robust applications.

  7. Q: Can SN74ALVCH245DW be used for level shifting between different voltage domains? A: Yes, SN74ALVCH245DW is commonly used for level shifting between different voltage domains, thanks to its wide operating voltage range.

  8. Q: What is the power supply current consumption of SN74ALVCH245DW? A: The power supply current consumption of SN74ALVCH245DW depends on the operating conditions and load, typically ranging from a few microamps to tens of milliamps.

  9. Q: Can SN74ALVCH245DW be used in high-speed applications? A: Yes, SN74ALVCH245DW is designed for high-speed operation and can be used in various high-frequency digital systems.

  10. Q: Are there any specific layout considerations for using SN74ALVCH245DW? A: Yes, it is recommended to follow the manufacturer's guidelines for PCB layout, including proper decoupling capacitors placement and signal integrity practices, to ensure optimal performance of SN74ALVCH245DW.

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