Overview
The PCA9538PW,118 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 device is part of NXP's family of I2C-bus I/O expanders and is developed to enhance the capabilities of I2C-bus/SMBus applications. It features an 8-bit Configuration register, 8-bit Input Port register, 8-bit Output Port register, and an 8-bit Polarity Inversion register, allowing for flexible input/output configuration and polarity inversion. The PCA9538PW,118 is particularly useful in scenarios where additional I/O is required for components such as ACPI power switches, sensors, push-buttons, LEDs, and fans.
Key Specifications
| Attribute | Value |
|---|---|
| Interface Type | I2C/SMBus |
| Clock Frequency-Max | 400 kHz |
| No of I/O Lines | 8 |
| Supply Voltage-Nom | 2.3 V to 5.5 V (3.0 V to 5.5 V for PCA9538PW/Q900) |
| Supply Current | 104 µA |
| Output Type | Push Pull |
| Output Current | 25 mA |
| Operating Temp Range | -40°C to +125°C |
| Storage Temperature Range | -65°C to +150°C |
| Power Dissipation | 0.2 W |
| Moisture Sensitivity Level | 1 |
| Package Style | TSSOP-16 |
| Mounting Method | Surface Mount |
Key Features
- 8-bit I2C-bus GPIO with interrupt and reset
- Operating power supply voltage range of 2.3 V to 5.5 V (3.0 V to 5.5 V for PCA9538PW/Q900)
- 5 V tolerant I/Os
- Polarity Inversion register for active HIGH or active LOW operation
- Active LOW interrupt output and Active LOW reset input
- Low standby current
- Noise filter on SCL/SDA inputs and no glitch on power-up
- Internal power-on reset and RESET pin for initialization without de-powering the device
- ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
- Latch-up testing done to JEDEC Standard JESD78 which exceeds 100 mA
- Available in three different packages: SO16, TSSOP16, and HVQFN16
Applications
The PCA9538PW,118 is designed for various applications where additional I/O is necessary. These include:
- ACPI power switches
- Sensors
- Push-buttons
- LEDs
- Fans
- Other general-purpose I/O expansion needs in embedded systems
Q & A
- What is the PCA9538PW,118 used for?
The PCA9538PW,118 is used for providing 8 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 PCA9538PW,118?
The operating voltage range is from 2.3 V to 5.5 V (3.0 V to 5.5 V for PCA9538PW/Q900).
- How many I/O lines does the PCA9538PW,118 have?
The device has 8 I/O lines.
- What is the maximum clock frequency of the PCA9538PW,118?
The maximum clock frequency is 400 kHz.
- What type of output does the PCA9538PW,118 have?
The output type is Push Pull.
- What is the operating temperature range of the PCA9538PW,118?
The operating temperature range is from -40°C to +125°C.
- Does the PCA9538PW,118 have ESD protection?
- What packages are available for the PCA9538PW,118?
The device is available in SO16, TSSOP16, and HVQFN16 packages.
- How does the PCA9538PW,118 handle power-on reset?
The device has an internal power-on reset and a RESET pin that initializes the device state machine without de-powering the device.
- Can multiple PCA9538PW,118 devices share the same I2C-bus/SMBus?
