ON Semiconductor CAT9555HV6I: High-Voltage I/O Expander

The CAT9555HV6I is a robust, high-voltage 16-bit I/O expander from ON Semiconductor designed to provide additional I/O capabilities to microcontrollers via the two-line bidirectional I²C bus. The device is particularly suitable for operation over a wide voltage range, making it an ideal choice for interfacing with high voltage signals in various industrial and commercial applications.

This I/O expander integrates 16 I/O ports that can be individually configured as an input or output. It allows easy serial expansion of I/O through an I²C interface, which is essential for applications with limited GPIOs. The CAT9555HV6I is designed to effectively handle 5.5V to 36V at the P-channel I/O ports, which is significantly higher than standard I/O expanders, providing greater flexibility in interfacing with various high-voltage components.

Each I/O port can be accessed and configured via the I²C interface with the ability to operate at clock frequencies of up to 400 kHz. The device also features an interrupt output which can be triggered by input change events, thus offering an efficient way for the host controller to detect input changes without the need to continuously poll the I/O expander.

The CAT9555HV6I comes in a compact TSSOP-24 package, saving valuable board space while providing ample I/O expansion. It is designed with built-in ESD protection circuits to ensure robustness and reliability in harsh environments. The operating temperature range of -40°C to +85°C makes it suitable for industrial temperature applications.

Key features of the CAT9555HV6I include:

• 16 individually configurable I/O ports
• Wide operating voltage range (5.5V to 36V)
• I²C interface with up to 400 kHz clock frequency
• Interrupt output for input change detection
• ESD protection
• Operating temperature range: -40°C to +85°C
• Compact TSSOP-24 package

With its high-voltage capability and ease of integration, the CAT9555HV6I from ON Semiconductor is an excellent choice for expanding I/O capabilities in a wide range of applications, including industrial control, automation, and any system requiring additional high-voltage tolerant I/O ports.