DESCRIPTION

· The PCA9534 is an 8-bit I/O expander designed for 2.3-V to 5.5-V VCC operation, facilitating general-purpose remote I/O expansion for most microcontroller families via the I2C interface.

· It includes one 8-bit Configuration, Input Port, Output Port, and Polarity Inversion register, with I/Os configured as inputs at power on.

· The system master can configure I/Os as inputs or outputs, with data for each input or output stored in the corresponding register.

· The device features an open-drain interrupt output activated when any input state differs from its corresponding input port register state, indicating a change to the system master.

FEATURES

· Low standby current consumption of 1 μA Max.

· I2C to Parallel port expander with open-drain active-low interrupt output.

· Operating power-supply voltage range of 2.3 V to 5.5 V with 5-V Tolerant I/O ports.

· 400-kHz Fast I2C bus and three hardware address pins allowing up to eight devices on the I2C/SMBus.

· Input/output configuration register, polarity inversion register, and internal power-on reset.

· Latched outputs with high-current drive maximum capability for directly driving LEDs.

· ESD Protection exceeds JESD 22 standards.

APPLICATIONS

· Remote I/O expansion for microcontroller families.

· Direct LED driving with high-current drive capability.

· Systems requiring low power consumption and robust ESD protection.