PCAL6408AEX1Z

PCAL6408AEX1Z is an 8-bit general purpose I/O expander that provides remote I/O expansion for many 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 to sensors, push buttons, keypad, 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. The PCAL6408A has a built-in level shifting feature that makes this device extremely flexible in mixed signal environments where communication between incompatible I/O voltages is required.

• I2C-bus to parallel port expander
• Operating power supply voltage range of 1.65V to 5.5V
• 5V tolerant I/O ports
• Active LOW reset input (active-low RESET)
• Open-drain active LOW interrupt output (active-low INT)
• 400kHz fast-mode I2C-bus, 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 25mA drive maximum capability for directly driving LEDs
• Latch-up performance exceeds 100mA per JESD 78, Class II
• X2QFN16 package, -40°C to +85°C temperature range