CAT9534

The CAT9534 is an 8-bit parallel input/output port expander for IC and SMBus compatible applications. These I/O expanders provide a simple solution in applications where additional I/Os are needed: sensors, power switches, LEDs, pushbuttons, and fans.

The CAT9534 consists of an input port register, an output port register, a configuration register, a polarity inversion register and an IC/SMBus-compatible serial interface.

Any of the eight I/Os can be configured as an input or output by writing to the configuration register. The system master can invert the CAT9534 input data by writing to the active-high polarity inversion register.

The CAT9534 features an active low interrupt output which indicates to the system master that an input state has changed.

 

CAT9534's extended addressing capability allows up to 8 devices to share the same bus.

CAT9534 is offered in 16 pin SOIC, TSSOP and TQFN packages and operates over the full -40C to +85C industrial temperature range.