PCAL6524HEAZ

PCAL6524HEAZ is an ultra low-voltage translating 24-bit Fm+ I2C-bus/SMBus I/O expander with Agile I/O features, interrupt output and reset. The PCAL6524 is a 24-bit general purpose I/O expander that provides remote I/O expansion for most microcontroller families via the Fast-mode Plus (Fm+) I2C-bus interface. The ultra low-voltage interface allows for direct connection to a microcontroller operating down to 0.8V. 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. In addition to providing a flexible set of GPIOs, it simplifies interconnection of a processor running at one voltage level down to 0.8V to I/O devices operating at a different voltage level 1.65V to 5.5V.

• I2C-bus to parallel port expander and 1MHz fast-mode plus I2C-bus
• 5.5V tolerant I/O ports and 3.6V tolerant I2C-bus pins
• Internal power-on reset, noise filter on SCL/SDA inputs
• Output port configuration: bank selectable or pin selectable push-pull or open-drain output stages
• Interrupt status: read-only register identifies the source of an interrupt
• INTR edge specification on a bit-by-bit basis, INTR individual clear W/O disturbing other events
• Read all interrupt events without clear, switch debounce hardware
• General call software reset and I2C software Device ID function
• 32 pin HUQFN package
• Ambient temperature range from -40 to 85°C

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