Overview
The PCA9535PWG4, produced by Texas Instruments, is a remote 16-bit I2C and SMBus low-power I/O expander. This device is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface. It features low standby-current consumption, making it suitable for power-sensitive applications. The PCA9535PWG4 is part of the PCA9535 series, which is known for its versatility and compatibility with a wide range of microcontrollers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Supply | 2.3 V to 5.5 V | V |
| Operating Temperature | -40°C to 85°C | °C |
| Clock Frequency | 400 kHz | kHz |
| Number of I/O | 16 | - |
| Output Type | Push-Pull | - |
| Output Source/Sink Current | 10 mA, 25 mA | mA |
| Interrupt Output | Yes, Open-Drain Active-Low | - |
| Package / Case | 24-TSSOP (0.173", 4.40mm Width) | - |
| Mounting Type | Surface Mount | - |
| Standby-Current Consumption | 1 μA Max | μA |
Key Features
- Low standby-current consumption of 1 μA Max, reducing power consumption when I/Os are held low.
- I2C to Parallel Port Expander operation, supporting general-purpose remote I/O expansion.
- Open-drain active-low interrupt output, indicating changes in input states.
- 5-V tolerant I/O ports, allowing for flexibility in system design.
- Compatible with most microcontrollers via the I2C interface (serial clock [SCL], serial data [SDA]).
- Power-on reset feature, initializing registers and the I2C/SMBus state machine to default states.
- Polarity Inversion register, allowing for active-high or active-low operation of the Input Port register.
- Three hardware pins (A0, A1, and A2) for programming and varying the fixed I2C address, enabling up to eight devices to share the same I2C bus or SMBus.
Applications
The PCA9535PWG4 is suitable for a variety of applications requiring remote I/O expansion, including:
- Industrial automation systems.
- Consumer electronics.
- Medical devices.
- Automotive systems.
- Any system requiring low-power, remote I/O expansion via the I2C or SMBus interface.
Q & A
- What is the PCA9535PWG4 used for?
The PCA9535PWG4 is used for remote 16-bit I2C and SMBus low-power I/O expansion in various microcontroller-based systems. - What is the operating voltage range of the PCA9535PWG4?
The operating voltage range is 2.3 V to 5.5 V. - What is the maximum standby-current consumption of the PCA9535PWG4?
The maximum standby-current consumption is 1 μA. - Does the PCA9535PWG4 support interrupt output?
Yes, it supports open-drain active-low interrupt output. - What is the clock frequency of the I2C interface on the PCA9535PWG4?
The clock frequency is 400 kHz. - How many I/O ports does the PCA9535PWG4 have?
The PCA9535PWG4 has 16 I/O ports. - What is the package type of the PCA9535PWG4?
The package type is 24-TSSOP (0.173", 4.40mm Width). - Is the PCA9535PWG4 compatible with most microcontrollers?
Yes, it is compatible with most microcontrollers via the I2C interface. - What is the operating temperature range of the PCA9535PWG4?
The operating temperature range is -40°C to 85°C. - Can multiple PCA9535PWG4 devices share the same I2C bus or SMBus?
Yes, up to eight devices can share the same I2C bus or SMBus using the address pins (A0, A1, and A2).
