PCAL6408AHKX

I2C/SMBus GPIO Expander 100kHz/400kHz 5.5V 16Pin XQFN T/R

The is an 8-bit I/O Expander that provides remote I/O expansion for most microcontroller families via the I²C-bus interface. The I/O expander provides a simple solution when additional I/Os are needed while keeping interconnections to a minimum. In addition to providing a flexible set of GPIOs, it simplifies interconnection of a processor running at one voltage level to I/O devices operating at a different usually higher voltage level. The PCAL6408A has built-in level shifting feature that makes this device extremely flexible in mixed signal environments where communication between incompatible I/O voltages is required. Its wide VDD range of 1.65 to 5.5V on the dual power rail allows seamless communications with next-generation low voltage microprocessors and microcontrollers on the interface side SDA/SCL and peripherals at a higher voltage on the port side.

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Low standby current consumption

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Schmitt-trigger action allows slow input transition and better switching noise immunity

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Open-drain active LOW interrupt output INT\

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Internal power-ON reset

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Power-up with all channels configured as inputs

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No glitch on power-up

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Latched outputs with 25mA drive maximum capability for directly driving LEDs

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Latch-up performance exceeds 100 mA per JESD 78, class II

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Bank selectable push-pull or open-drain output stages

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Read-only register identifies the source of an interrupt

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Input port register values changes are kept until the input port register is read

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Floating input or pull-up/pull-down resistor enable

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Mask prevents the generation of the interrupt when input changes state

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100kR Pull-up/down resistor