PCA9535HF,118

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: GPIO Expander
• Characteristics:
  • I2C-bus controlled 16-bit I/O expander
  • Low standby current consumption
  • Schmitt-trigger action on all inputs
  • Open-drain interrupt output
• Package: TSSOP20
• Essence: The PCA9535HF,118 is a 16-bit I/O expander that can be controlled through the I2C-bus interface. It provides additional general-purpose input/output (GPIO) pins for microcontrollers or other devices.
• Packaging/Quantity: The PCA9535HF,118 is typically sold in reels of 2500 units.

Specifications

• Supply Voltage: 2.3V to 5.5V
• Input/Output Voltage: 0V to VDD
• Maximum Output Current: 25mA per channel
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Frequency: Up to 400kHz

Detailed Pin Configuration

The PCA9535HF,118 has a total of 20 pins in a TSSOP package. The pin configuration is as follows:

```

---

| | |1 10| | | |2 11| | | |3 12| | | |4 13| | | |5 14| | | |6 15| | | |7 16| | | |8 17| | | |9 18| | | |_______________| ```

Functional Features

• 16-bit I/O Expander: Provides 16 additional GPIO pins.
• I2C-bus Interface: Allows easy control and communication with microcontrollers or other devices.
• Schmitt-trigger Action: Ensures reliable input signal transitions.
• Open-drain Interrupt Output: Can be used to indicate changes in the input states.

Advantages

• Expandability: The PCA9535HF,118 allows for easy expansion of GPIO pins, providing flexibility in system design.
• Low Standby Current Consumption: Helps conserve power in battery-powered applications.
• Schmitt-trigger Action: Enhances noise immunity and signal integrity.
• I2C-bus Interface: Simplifies integration with existing systems.

Disadvantages

• Limited Output Current: Each channel can only provide a maximum output current of 25mA, which may not be sufficient for certain applications requiring higher current.
• I2C-bus Dependency: The functionality of the PCA9535HF,118 relies on the proper functioning of the I2C-bus interface, which may introduce potential communication issues.

Working Principles

The PCA9535HF,118 operates by receiving commands and data through the I2C-bus interface. It can be configured as either an input or output device for each individual pin. When configured as an input, it monitors the state of the corresponding pin and can generate an interrupt if a change is detected. When configured as an output, it can drive the corresponding pin high or low based on the received command.

Detailed Application Field Plans

The PCA9535HF,118 finds applications in various fields where additional GPIO pins are required. Some potential application areas include: - Industrial automation - Home automation - Internet of Things (IoT) devices - Robotics - Automotive electronics

Detailed and Complete Alternative Models

• PCA9534PW,112: 8-bit I/O expander with similar features but fewer GPIO pins.
• MCP23017-E/SP: 16-bit I/O expander with similar features and an SPI interface.
• MAX7313AUG+: 16-bit I/O expander with similar features and a higher maximum output current.

These alternative models offer similar functionality to the PCA9535HF,118 and can be considered based on specific project requirements.

Word count: 455 words