PCAL9722HN - NXP

Description: The PCAL9722 is a 22-bit general purpose I/O expander that provides remote I/O expansion for most microcontroller families via the SPI interface. The ultra low-voltage interface allows for direct connection to a microcontroller operating down to 1.1 V. NXP I/O expanders provide a simple solution when additional I/Os are needed while keeping interconnections to a minimum, for example, in battery-powered mobile applications for interfacing to sensors, push buttons, keypad, etc. I