Microchip 8-Bit I/O Expander I2C PDIP18

The Microchip 8-Bit I/O Expander I2C PDIP18 provides an 8-bit, general-purpose, parallel I/O expansion specifically designed for I2C bus applications. This versatile device consists of multiple 8-bit configuration registers for input, output, and polarity selection, allowing the system master to easily enable the I/Os as either inputs or outputs by writing the I/O configuration bits.

The data for each input or output is conveniently stored in the corresponding Input or Output register. Additionally, the polarity of the Input Port register can be inverted using the Polarity Inversion register, offering enhanced flexibility for various circuit designs. All registers can be read by the system master, ensuring seamless integration and control.

Key Features

• High-speed I2C interface
• 3 hardware address pins for flexible addressing
• Configurable interrupt output pin (active high, active low, or open drain)
• Configurable interrupt source
• Polarity Inversion register to configure the polarity of the input port data
• External reset input
• Low standby current: 1μA max.

Designed for reliability and performance, this I/O expander is suitable for a wide range of demanding environments, including automation process control, automotive systems, and aerospace applications.