Overview
The PCA9538PW,112 is a 16-pin CMOS device manufactured by NXP USA Inc., designed to provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion. This I/O expander is tailored for I2C-bus and SMBus applications, offering features such as interrupt and reset capabilities. It is part of NXP's family of I2C-bus I/O expanders, which are ideal for expanding the I/O capabilities of microcontrollers in various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Power-Supply Voltage Range | 2.3 V to 5.5 V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | TSSOP16 | |
| Interface | I2C, SMBus | |
| Clock Frequency | 0 Hz to 400 kHz | Hz |
| Interrupt Output | Active LOW | |
| Reset Input | Active LOW | |
| Output Current (Source/Sink) | 10 mA / 25 mA | mA |
| ESD Protection | Exceeds 2000 V HBM, 1000 V CDM | V |
| Latch-Up Testing | Exceeds 100 mA per JESD78 | mA |
Key Features
- 8-bit I2C-bus GPIO with interrupt and reset
- 5 V tolerant I/Os
- Polarity Inversion register (active HIGH or active LOW operation)
- Low standby current consumption (max 1 μA)
- No glitch on power-up
- Noise filter on SCL/SDA inputs
- Internal power-on reset and active LOW reset input
- Latched outputs with high-current drive capability for directly driving LEDs
- Two hardware address pins allowing up to four devices on the same I2C/SMBus
Applications
The PCA9538PW,112 is suitable for a variety of applications where additional I/O is required, such as:
- ACPI power switches
- Sensors and monitoring systems
- Push-buttons and user interfaces
- LED indicators and lighting systems
- Fans and motor control systems
Q & A
- What is the operating voltage range of the PCA9538PW,112?
The operating voltage range is from 2.3 V to 5.5 V.
- What is the maximum clock frequency supported by the PCA9538PW,112?
The maximum clock frequency is 400 kHz.
- Does the PCA9538PW,112 have ESD protection?
- How many devices can share the same I2C/SMBus using the PCA9538PW,112?
- What is the purpose of the Polarity Inversion register in the PCA9538PW,112?
- Does the PCA9538PW,112 have an internal power-on reset?
- What is the standby current consumption of the PCA9538PW,112?
- Can the PCA9538PW,112 drive LEDs directly?
- What is the package type of the PCA9538PW,112?
- Is the PCA9538PW,112 5 V tolerant?
