Manufacturer Part Number
PCA9538PW
Manufacturer
Texas Instruments
Introduction
The PCA9538PW is an 8-bit I/O expander with an I2C and SMBus compatible interface, suitable for expanding input/output operations in microcontroller-based systems.
Product Features and Performance
8-bit I/O expander
I2C and SMBus compatible interface
Interrupt output feature
Power-on reset (POR)
Output type: Push-pull
Clock frequency: Up to 400 kHz
Product Advantages
Enhances I/O capability with minimal pin usage
Flexible interfacing with I2C and SMBus
Real-time response thanks to interrupt output
Key Technical Parameters
Number of I/O: 8
Current Output Source/Sink: 10mA, 25mA
Voltage Supply: 2.3V to 5.5V
Operating Temperature: -40°C to 85°C
Clock Frequency: 400 kHz
Quality and Safety Features
Incorporates power-on reset to safeguard during power fluctuations
Designed for robust operation in a temperature range of -40°C to 85°C
Compatibility
Compatible with devices that support I2C and SMBus interfaces
Application Areas
Microcontroller systems
Industrial automation
Robotics
Data acquisition systems
Product Lifecycle
Product Status: Obsolete
Consumers should look for replacements or consider newer upgrades
Several Key Reasons to Choose This Product
Simplifies design and reduces complexity by expanding I/O via only two bus lines
Supports common interface standards (I2C, SMBus) ensuring broad compatibility
Built-in features like POR and interrupt output add reliability and usability in system design
Operates across a wide voltage range (2.3V to 5.5V) accommodating various power supplies
Suitable for rugged applications given the extensive operating temperature range