Overview
The PCA9539BS,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.
The PCA9539BS,118 is particularly useful in scenarios where more I/O ports are required, offering a simple and efficient solution through its I2C-bus and SMBus compatibility.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | HVQFN24 |
| Number of I/O Pins | 16 |
| 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 |
| 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 |
| Reset Type | Power-on reset and external reset pin |
| Interrupt Output | Open-drain, active LOW |
| Temperature Range | -40°C to +85°C |
Key Features
- 16-bit I2C-bus and SMBus low power I/O port with interrupt and reset
- Operating power supply voltage range of 2.3 V to 5.5 V
- 5 V tolerant I/Os
- Polarity inversion register for active HIGH or active LOW operation
- Open-drain 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 inputs
- Available in SO24, TSSOP24, and HVQFN24 packages
Applications
- ACPI power switches
- Sensors
- Push buttons
- LEDs
- Fans
- Other applications requiring additional I/O expansion
Q & A
- What is the PCA9539BS,118 used for?
The PCA9539BS,118 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 PCA9539BS,118?
The operating power supply voltage range is from 2.3 V to 5.5 V, with specific models like PCA9539PW/Q900 and PCA9539RPW/Q900 operating from 3.0 V to 5.5 V.
- What types of packages are available for the PCA9539BS,118?
The device is available in SO24, TSSOP24, and HVQFN24 packages.
- What is the purpose of the polarity inversion register?
The polarity inversion register allows for the polarity of the read register to be inverted, enabling active HIGH or active LOW operation.
- How does the 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 a power-on reset?
During a power-on reset, the device's registers are set to their default values, and the device state machine is initialized.
- What is the clock frequency range of the PCA9539BS,118?
The clock frequency range is from 0 Hz to 400 kHz.
- Does the PCA9539BS,118 have ESD protection?
Yes, it exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101.
- What is the temperature range for the PCA9539BS,118?
The temperature range is from -40°C to +85°C.
- How does the reset pin function?
The reset pin causes the device to reset to its default state without de-powering the device, holding the registers and I2C-bus state machine in their default state until the reset input is once again HIGH.
- What are some common applications of the PCA9539BS,118?
Common applications include ACPI power switches, sensors, push buttons, LEDs, and fans.
