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SN74LVCH245ADW
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SN74LVCH245ADW

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Level Shifter and Bus Transceiver
  • Characteristics: Low-Voltage, High-Speed, Octal Bus Transceiver
  • Package: SOIC (Small Outline Integrated Circuit) - 20 pins
  • Essence: This IC is designed to facilitate bidirectional level shifting between different voltage domains in digital systems.
  • Packaging/Quantity: Available in reels of 2500 units or tubes of 90 units.

Specifications

  • Supply Voltage Range: 1.65V to 3.6V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Maximum Operating Frequency: 400 MHz
  • Number of Channels: 8
  • Input/Output Type: Tri-State
  • Propagation Delay: 2.9 ns (Max)
  • Output Drive Capability: ±24 mA

Detailed Pin Configuration

The SN74LVCH245ADW has a total of 20 pins, which are assigned as follows:

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

Functional Features

  • Bidirectional voltage level shifting between two voltage domains.
  • Tri-state outputs allow multiple devices to share a common bus.
  • High-speed operation with low propagation delay.
  • Supports a wide supply voltage range, making it compatible with various digital systems.
  • ESD (Electrostatic Discharge) protection on all inputs and outputs.

Advantages and Disadvantages

Advantages: - Enables seamless communication between different voltage domains. - Provides reliable and efficient level shifting for digital systems. - High-speed operation allows for fast data transfer. - Wide supply voltage range enhances compatibility.

Disadvantages: - Limited number of channels (8) may not be sufficient for complex systems requiring more connections. - Requires careful consideration of input and output voltage levels to prevent signal distortion or damage.

Working Principles

The SN74LVCH245ADW operates by receiving data from one voltage domain (Channel A) and transmitting it to another voltage domain (Channel B), or vice versa. The direction of data flow is controlled by the DIR pin. When the DIR pin is set to a logic high or low, the corresponding channel becomes an input or output, respectively. The OE pin is used to enable or disable the outputs.

The IC utilizes internal circuitry to perform level shifting, ensuring that signals from one voltage domain are properly translated to the voltage levels of the other domain. This enables seamless communication between devices operating at different voltage levels.

Detailed Application Field Plans

The SN74LVCH245ADW finds applications in various digital systems where bidirectional level shifting is required. Some common application fields include:

  1. Microcontrollers and Microprocessors: Facilitating communication between devices operating at different voltage levels, such as connecting a microcontroller to external peripherals.
  2. Communication Interfaces: Enabling data transfer between devices with varying voltage requirements, such as UART, SPI, or I2C interfaces.
  3. Memory Systems: Allowing for the connection of memory modules operating at different voltage levels, such as interfacing between DDR3 and DDR4 memory modules.

Detailed and Complete Alternative Models

  1. SN74LVC245A: Similar functionality but operates at a lower supply voltage range (1.65V to 3.6V).
  2. SN74LVCH244A: Octal buffer/line driver with similar characteristics but without bidirectional capability.
  3. SN74LVC1T45: Single-bit level shifter with similar characteristics but designed for low-power applications.

These alternative models offer similar functionality to the SN74LVCH245ADW but may have slight differences in specifications or package options. It is important to select the appropriate model based on specific system requirements.

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Luettele 10 yleistä kysymystä ja vastausta, jotka liittyvät SN74LVCH245ADW :n soveltamiseen teknisissä ratkaisuissa

Sure! Here are 10 common questions and answers related to the application of SN74LVCH245ADW:

  1. Q: What is SN74LVCH245ADW? A: SN74LVCH245ADW 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 SN74LVCH245ADW? A: SN74LVCH245ADW operates within a voltage range of 1.65V to 5.5V.

  3. Q: How many channels does SN74LVCH245ADW have? A: SN74LVCH245ADW has 8 bidirectional channels, allowing data transmission in both directions.

  4. Q: What is the maximum data transfer rate supported by SN74LVCH245ADW? A: SN74LVCH245ADW supports data transfer rates up to 400 Mbps.

  5. Q: Can SN74LVCH245ADW be used for level shifting between different voltage domains? A: Yes, SN74LVCH245ADW can be used for level shifting between voltage domains, as long as the voltage levels are within its operating range.

  6. Q: Does SN74LVCH245ADW have built-in ESD protection? A: Yes, SN74LVCH245ADW has built-in ESD protection, making it more robust against electrostatic discharge events.

  7. Q: Can SN74LVCH245ADW be used in high-speed applications? A: Yes, SN74LVCH245ADW can be used in high-speed applications due to its fast propagation delay and low output skew characteristics.

  8. Q: Is SN74LVCH245ADW compatible with both CMOS and TTL logic levels? A: Yes, SN74LVCH245ADW is compatible with both CMOS and TTL logic levels, making it versatile for various digital systems.

  9. Q: Can SN74LVCH245ADW be used in automotive applications? A: Yes, SN74LVCH245ADW is qualified for automotive applications and meets the necessary standards for automotive electronics.

  10. Q: What is the package type of SN74LVCH245ADW? A: SN74LVCH245ADW is available in a standard SOIC-20 package, which is commonly used in electronic circuits.

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.