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TCA9535DBT
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TCA9535DBT - English Editing Encyclopedia Entry

Product Overview

Category

TCA9535DBT belongs to the category of integrated circuits (ICs).

Use

This product is commonly used for digital input/output (I/O) expansion in various electronic devices and systems.

Characteristics

  • TCA9535DBT is a 16-bit I/O expander with an I2C interface.
  • It provides 16 general-purpose I/O pins, which can be configured as either inputs or outputs.
  • The device operates at a voltage range of 1.65V to 5.5V, making it suitable for a wide range of applications.
  • It offers high-speed I2C communication, allowing for efficient data transfer between the microcontroller and the I/O expander.
  • TCA9535DBT has built-in ESD protection, ensuring reliable operation even in harsh environments.

Package and Essence

TCA9535DBT is available in a small-sized TSSOP package, which allows for easy integration into compact electronic designs. The essence of this product lies in its ability to expand the number of available I/O pins, enabling greater flexibility in system design.

Packaging/Quantity

The TCA9535DBT is typically sold in reels containing 2500 units per reel.

Specifications

  • Supply Voltage Range: 1.65V to 5.5V
  • Number of I/O Pins: 16
  • Communication Interface: I2C
  • Operating Temperature Range: -40°C to +85°C
  • Package Type: TSSOP

Detailed Pin Configuration

The pin configuration of TCA9535DBT is as follows:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | SDA | Serial Data Input/Output | | 2 | SCL | Serial Clock Input | | 3-18 | P0-P15 | General Purpose I/O Pins |

Functional Features

  1. I2C Interface: TCA9535DBT utilizes the widely-used I2C communication protocol, allowing for easy integration with microcontrollers and other devices.
  2. Configurable I/O Pins: Each of the 16 I/O pins can be individually configured as either inputs or outputs, providing flexibility in system design.
  3. Interrupt Output: The device supports an interrupt output pin that can be used to notify the microcontroller of any changes in the input states.
  4. Low Standby Current: TCA9535DBT has a low standby current consumption, making it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages

  • Compact size and small footprint enable easy integration into space-constrained designs.
  • Wide operating voltage range allows for compatibility with various power supply systems.
  • High-speed I2C interface ensures efficient data transfer between the microcontroller and the I/O expander.
  • Built-in ESD protection enhances the reliability of the device.

Disadvantages

  • Limited number of I/O pins may not be sufficient for complex systems requiring a large number of inputs and outputs.
  • Lack of additional advanced features such as PWM or analog functionality.

Working Principles

TCA9535DBT operates by receiving commands and data through the I2C interface from the microcontroller. It then processes these commands to configure the I/O pins as either inputs or outputs. The device continuously monitors the input pins and provides the corresponding output states based on the programmed configuration. Any changes in the input states can trigger an interrupt signal to the microcontroller, allowing for real-time response.

Detailed Application Field Plans

TCA9535DBT finds applications in various fields, including but not limited to:

  1. Industrial Automation: Used for I/O expansion in control systems, allowing for the connection of multiple sensors and actuators.
  2. Consumer Electronics: Integrated into smart home devices to expand the number of available I/O pins for connecting peripherals.
  3. Automotive: Employed in automotive electronics for expanding the I/O capabilities of microcontrollers, enabling enhanced functionality.
  4. Medical Devices: Utilized in medical equipment to increase the number of I/O channels, facilitating data acquisition and control.

Detailed and Complete Alternative Models

  1. PCA9535PW: Similar to TCA9535DBT, this 16-bit I/O expander also operates on the I2C interface but comes in a different package (TSSOP).
  2. MCP23017: Another popular choice for I/O expansion, this IC offers 16 I/O pins and supports both I2C and SPI communication interfaces.
  3. SX1509: This 16-channel GPIO expander provides advanced features such as LED driver functionality and PWM outputs.

In conclusion, TCA9535DBT is a versatile I/O expander that enables digital

10個與TCA9535DBT在技術方案中應用相關的常見問題與解答

Sure! Here are 10 common questions and answers related to the application of TCA9535DBT in technical solutions:

  1. Q: What is TCA9535DBT? A: TCA9535DBT is a 16-bit I/O expander with I2C interface, which allows for easy expansion of digital I/O ports in various applications.

  2. Q: What is the operating voltage range of TCA9535DBT? A: The operating voltage range of TCA9535DBT is typically between 1.65V and 5.5V.

  3. Q: How many I/O pins does TCA9535DBT have? A: TCA9535DBT has 16 I/O pins that can be configured as either inputs or outputs.

  4. Q: Can TCA9535DBT handle higher voltages than its operating voltage range? A: No, TCA9535DBT is not designed to handle voltages higher than its operating voltage range. It is recommended to use level shifters if you need to interface with higher voltage devices.

  5. Q: How do I communicate with TCA9535DBT using I2C? A: To communicate with TCA9535DBT, you need to connect it to an I2C bus and send appropriate commands and data over the bus using the I2C protocol.

  6. Q: Can TCA9535DBT be used as both input and output at the same time? A: Yes, TCA9535DBT supports bidirectional I/O, so you can configure each pin individually as either an input or an output.

  7. Q: What is the maximum current that TCA9535DBT can source or sink on its I/O pins? A: TCA9535DBT can source or sink up to 25mA per I/O pin, with a total package current limit of 200mA.

  8. Q: Can TCA9535DBT be used in applications requiring higher current sourcing or sinking capabilities? A: If you need higher current capabilities, you can use TCA9539DBT, which is a similar device but with higher current drive capability.

  9. Q: Is TCA9535DBT compatible with 5V systems? A: Yes, TCA9535DBT is compatible with both 3.3V and 5V systems, as it has 5V tolerant inputs.

  10. Q: Are there any evaluation boards or reference designs available for TCA9535DBT? A: Yes, Texas Instruments provides evaluation boards and reference designs for TCA9535DBT, which can help you get started with your application quickly.

Please note that these answers are general and may vary depending on the specific implementation and requirements of your technical solution.