TCA9539RTWR: A Low-Voltage 16-Bit I²C and SMBus I/O Expander

The TCA9539RTWR is a low-voltage 16-bit I²C and SMBus I/O expander from Texas Instruments (TI). This device provides 16 bits of general-purpose parallel input/output (I/O) expansion and supports the two-wire bidirectional I²C bus (or SMBus protocol).

Key Features and Specifications

• I/O Expansion: The TCA9539RTWR offers 16 bits of I/O expansion, allowing for increased flexibility and control in various applications.
• I²C and SMBus Compatibility: The device supports both I²C and SMBus protocols, making it compatible with a wide range of microcontrollers and other devices that use these communication interfaces.
• Low-Voltage Operation: The TCA9539RTWR can operate within a power supply voltage range of 1.65 V to 5.5 V, making it suitable for low-voltage applications.
• Clock Frequency Support: The device supports clock frequencies of up to 400 kHz (I²C fast mode) and is also compatible with the 100 kHz standard mode.
• Interrupt Output: The TCA9539RTWR features an interrupt output pin, which can be used to signal changes in the I/O ports or other conditions to the host microcontroller.
• Reset Pin and Configuration Registers: The device includes a reset pin for initialization and configuration registers that allow for flexible configuration of the I/O ports.
• Push-Pull Output Type: The outputs of the TCA9539RTWR are push-pull type, providing a robust interface for driving loads.
• Package and Dimensions: The TCA9539RTWR is packaged in a compact 24-WQFN (4x4 mm) package, making it suitable for space-constrained applications.
• Operating Temperature Range: The device has an operating temperature range of -40°C to +85°C, ensuring reliable operation in various environmental conditions.

Applications

Due to its low-voltage operation, I²C/SMBus compatibility, and 16-bit I/O expansion capabilities, the TCA9539RTWR is suitable for a wide range of applications, including:

• Industrial and Embedded Systems: The device can be used to expand I/O capabilities in industrial controllers, embedded systems, and other devices that require additional control lines.
• Consumer Electronics: The TCA9539RTWR can be used in consumer electronics devices such as smartphones, tablets, and other portable devices to expand I/O functionality.
• IoT and Smart Devices: The device is ideal for use in IoT devices and smart home appliances, where low power consumption and compact packaging are essential.

In summary, the TCA9539RTWR is a versatile and reliable low-voltage 16-bit I²C and SMBus I/O expander from Texas Instruments. Its compact packaging, low power consumption, and wide range of operating conditions make it suitable for various applications in industrial, embedded, consumer electronics, and IoT fields.