Texas Instruments
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TCA9535DBR
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TCA9535DBR

Product Overview

Category

TCA9535DBR belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

  • TCA9535DBR is a 16-bit I/O expander with an I2C interface.
  • It provides 16 general-purpose parallel input/output pins.
  • The device operates at a voltage range of 1.65V to 5.5V.
  • It is compatible with both 3.3V and 5V systems.
  • TCA9535DBR has a low standby current consumption of only 1µA.

Package

The TCA9535DBR is available in a small-sized, surface-mount SSOP package.

Essence

The essence of TCA9535DBR lies in its ability to expand the number of I/O pins available in electronic systems, thereby enhancing their functionality.

Packaging/Quantity

This product is typically packaged in reels, with each reel containing 2500 units of TCA9535DBR.

Specifications

  • Number of I/O Pins: 16
  • Interface: I2C
  • Voltage Range: 1.65V to 5.5V
  • Standby Current: 1µA
  • Package Type: SSOP

Detailed Pin Configuration

The pin configuration of TCA9535DBR is as follows:

| Pin No. | Pin Name | Description | |---------|----------|-------------| | 1 | SDA | I2C Serial Data Input/Output | | 2 | SCL | I2C Serial Clock Input | | 3-18 | P0-P15 | General Purpose Parallel I/O Pins |

Functional Features

  • Provides 16 general-purpose I/O pins for input/output expansion.
  • Supports bidirectional communication through the I2C interface.
  • Allows individual configuration of each I/O pin as input or output.
  • Offers programmable interrupt capability for efficient system monitoring.

Advantages and Disadvantages

Advantages

  • Compact size and surface-mount package make it suitable for space-constrained applications.
  • Wide voltage range compatibility enables integration into various systems.
  • Low standby current consumption minimizes power usage in idle states.
  • Programmable interrupt feature enhances system efficiency.

Disadvantages

  • Limited number of I/O pins may not suffice for complex applications requiring extensive I/O expansion.
  • Lack of built-in protection features against overvoltage or ESD events.

Working Principles

TCA9535DBR operates by communicating with a microcontroller or host device through the I2C interface. The microcontroller sends commands to configure the I/O pins as either inputs or outputs. The device then reads or writes data to these pins accordingly. The programmable interrupt feature allows the microcontroller to be notified when specific events occur on the I/O pins, reducing the need for continuous polling.

Detailed Application Field Plans

TCA9535DBR finds application in various fields, including but not limited to: 1. Industrial automation systems 2. Consumer electronics 3. Internet of Things (IoT) devices 4. Robotics 5. Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to TCA9535DBR are: 1. MCP23017 - 16-Bit I/O Expander with I2C Interface 2. PCF8574 - 8-Bit I/O Expander with I2C Interface 3. MAX7313 - 16-Bit I/O Expander with Serial Interface

These alternatives can be considered based on specific requirements and system constraints.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением TCA9535DBR в технических решениях.

Sure! Here are 10 common questions and answers related to the application of TCA9535DBR:

  1. Q: What is TCA9535DBR? A: TCA9535DBR is a digital I/O expander with 16 GPIO pins, which can be controlled using I2C communication.

  2. Q: What is the operating voltage range for TCA9535DBR? A: The operating voltage range for TCA9535DBR is typically between 1.65V and 5.5V.

  3. Q: How many I2C addresses can TCA9535DBR support? A: TCA9535DBR supports up to 8 different I2C addresses, allowing multiple devices to be connected on the same bus.

  4. Q: Can TCA9535DBR be used as both input and output pins? A: Yes, each GPIO pin of TCA9535DBR can be individually configured as either an input or an output.

  5. Q: What is the maximum current that TCA9535DBR can source or sink per GPIO pin? A: TCA9535DBR can source or sink up to 25mA per GPIO pin.

  6. Q: Is TCA9535DBR compatible with 5V systems? A: Yes, TCA9535DBR is 5V tolerant and can be used in 5V systems without any level-shifting circuitry.

  7. Q: Can TCA9535DBR generate interrupts based on GPIO pin changes? A: Yes, TCA9535DBR has interrupt functionality that can be configured to trigger when a GPIO pin changes its state.

  8. Q: How can I control TCA9535DBR using an Arduino? A: You can use the Wire library in Arduino to communicate with TCA9535DBR over I2C.

  9. Q: Can TCA9535DBR be cascaded with other I/O expanders? A: Yes, multiple TCA9535DBR devices can be cascaded together to expand the number of GPIO pins available.

  10. Q: What are some common applications of TCA9535DBR? A: TCA9535DBR is commonly used in applications such as LED control, keypad scanning, sensor interfacing, and general-purpose I/O expansion.

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