Overview
The PCA9539RPW,118, manufactured by NXP USA Inc., is a 24-pin CMOS device designed to provide 16 bits of General Purpose parallel Input/Output (GPIO) expansion. This device is part of the NXP Semiconductors family of I2C-bus I/O expanders, enhancing the capability to add additional I/Os for various applications such as ACPI power switches, sensors, push buttons, LEDs, and fans.
Key Specifications
| Specification | Value |
|---|---|
| Interface | I2C, SMBus, Serial |
| Number of GPIOs | 16 bits |
| Operating Power Supply Voltage | 2.3 V to 5.5 V |
| Max Frequency | 400 kHz |
| Max Operating Temperature | 85 °C |
| Max Power Dissipation | 200 mW |
| Package Type | TSSOP24 |
| Environmental Compliance | PbFree, EU RoHS, Halogen Free |
Key Features
- 16-bit I2C-bus GPIO with interrupt and reset capabilities
- Operating power supply voltage range of 2.3 V to 5.5 V
- 5 V tolerant I/Os
- Low power consumption, especially when I/Os are held LOW
- Open-drain interrupt output to indicate input state changes
- RESET pin functionality to reset the device state machine or just the I2C-bus interface
- Hardware address pins (A0, A1) allowing up to four devices on the same I2C-bus/SMBus
Applications
The PCA9539RPW,118 is suitable for a variety of applications requiring additional I/O expansion, such as:
- ACPI power switches
- Sensors and monitoring systems
- Push buttons and user interfaces
- LED indicators and lighting control
- Fan control and other peripheral devices
Q & A
- What is the PCA9539RPW,118 used for?
The PCA9539RPW,118 is used for providing 16 bits of General Purpose parallel Input/Output (GPIO) expansion with interrupt and reset capabilities. - What interfaces does the PCA9539RPW,118 support?
The device supports I2C, SMBus, and Serial interfaces. - What is the operating voltage range of the PCA9539RPW,118?
The operating voltage range is from 2.3 V to 5.5 V. - What is the maximum frequency of the I2C-bus?
The maximum frequency is 400 kHz. - How many devices can share the same I2C-bus/SMBus?
Up to four devices can share the same I2C-bus/SMBus using the hardware address pins (A0, A1). - What is the purpose of the RESET pin?
The RESET pin can reset the device state machine or just the I2C-bus interface, depending on the device variant. - Is the PCA9539RPW,118 environmentally compliant?
Yes, it is PbFree, EU RoHS, and Halogen Free compliant. - What is the package type of the PCA9539RPW,118?
The package type is TSSOP24. - How does the open-drain interrupt output work?
The open-drain interrupt output is activated when any input state differs from its corresponding input port register state, indicating to the system master that an input state has changed. - What happens during power-on reset?
All registers return to their default values during power-on reset.
