PCA6408AHKX

PCA6408AHKX is a low-voltage, 8-bit I²C-bus and SMBus I/O expander with interrupt output, reset, and configuration registers. It is an 8-bit general-purpose I/O expander that provides remote I/O expansion for most microcontroller families via the I²C-bus interface. It provides a simple solution when additional I/Os are needed while keeping interconnections to a minimum, for example, in battery-powered mobile applications for interfacing with sensors, push buttons, keypads, etc. In addition to providing a flexible set of GPIOs, it simplifies the interconnection of a processor running at one voltage level to I/O devices operating at a different (usually higher) voltage level. It has a built-in level-shifting feature that makes these devices extremely flexible in mixed signal environments where communication between incompatible I/O voltages is required. This indicates the VDD level of the I²C-bus to the PCA6408A. The voltage level on Port P of the PCA6408A is determined by the VDD(P).

• 2C-bus to parallel port expander
• Low standby current consumption of 1µA, ESD protection exceeds JESD 22
• Schmitt-trigger action allows slow I/P transition/better switching noise immunity at SCL/SDA I/Ps
• 5V tolerant I/O ports, active LOW reset input (RESET, active low)
• Open-drain active LOW INT output, latch-up performance exceeds 100 mA per JESD 78, Class II
• 400KHz fast-mode I²C-bus, input/output configuration register
• Polarity inversion register, internal power-on reset, noise filter on SCL/SDA inputs
• Power-up with all channels configured as inputs, no glitch on power-up
• Latched outputs with 25 mA drive maximum capability for directly driving LEDs
• XQFN16 package, ambient temperature range from -40 to +85°C