Overview
The PCA9539RPW/Q900J, produced 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 I2C-bus and SMBus family of I/O expanders, enhancing the capability to add more I/Os to a system. It is particularly useful for applications requiring additional I/O for components such as ACPI power switches, sensors, push buttons, LEDs, and fans.
Key Specifications
| Specification | Value |
|---|---|
| Number of I/O Pins | 16 |
| Interface | I2C-bus and SMBus |
| Operating Power Supply Voltage | 2.3 V to 5.5 V (3.0 V to 5.5 V for PCA9539PW/Q900 and PCA9539RPW/Q900) |
| I/O Voltage Tolerance | 5 V tolerant |
| Package Type | TSSOP24 |
| Operating Temperature Range | -40°C to +85°C |
| Clock Frequency | 0 Hz to 400 kHz |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 |
| Latch-up Testing | Exceeds 100 mA per JEDEC Standard JESD78 |
Key Features
- 16-bit I2C-bus GPIO with interrupt and reset
- Polarity inversion register for active HIGH or active LOW operation
- Active LOW interrupt output and active LOW reset input
- Low standby current and noise filter on SCL/SDA inputs
- No glitch on power-up and internal power-on reset
- 16 I/O pins which default to 16 inputs
- AEC-Q100 compliant for automotive applications
Applications
The PCA9539RPW/Q900J is suitable for various applications requiring additional I/O expansion, such as:
- ACPI power switches
- Sensors and monitoring systems
- Push buttons and user interfaces
- LED indicators and display systems
- Fans and other control systems
- Automotive systems due to its AEC-Q100 compliance
Q & A
- What is the PCA9539RPW/Q900J used for?
The PCA9539RPW/Q900J is used for providing 16 bits of General Purpose parallel Input/Output (GPIO) expansion with interrupt and reset for I2C-bus/SMBus applications.
- What is the operating voltage range of the PCA9539RPW/Q900J?
The operating power supply voltage range is from 2.3 V to 5.5 V, with specific models operating from 3.0 V to 5.5 V.
- What type of interface does the PCA9539RPW/Q900J use?
The device uses the I2C-bus and SMBus interface.
- What is the clock frequency range of the PCA9539RPW/Q900J?
The clock frequency range is from 0 Hz to 400 kHz.
- Does the PCA9539RPW/Q900J have ESD protection?
- What is the operating temperature range of the PCA9539RPW/Q900J?
The operating temperature range is from -40°C to +85°C.
- Is the PCA9539RPW/Q900J compliant with automotive standards?
- What type of package is the PCA9539RPW/Q900J available in?
- Does the PCA9539RPW/Q900J have an internal power-on reset?
- Can the polarity of the I/O pins be inverted?
