CAT9534 Datasheet | onsemi

.. 8-bit I²C and SMBus I/O Port with Interrupt Features - 400k Hz I²C bus patible - 2.3V to 5.5V operation - Low stand-by current - 5V tolerant I/Os - 8 I/O pins that default to inputs at power-up - High drive capability - Individual I/O configuration - Polarity inversion register - Active low interrupt output - Internal power-on reset - No glitch on power-up - Noise filter on SDA/SCL inputs - Cascadable up to 8 devices - Industrial temperature range - Ro HS-pliant 16-lead SOIC and TSSOP, and 16-pad TQFN (4 x 4mm) packages DESCRIPTION The CAT9534 is an 8-bit parallel input/output port expander for I²C and SMBus patible 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 I²C/SMBus-patible 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. The device’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 -40ºC to +85ºC industrial temperature range. For Ordering Information details, see page 15. APPLICATIONS - White goods (dishwashers, washing machines) - Handheld devices (cell phones, PDAs, digital cameras) - Data munications (routers, hubs and servers) BLOCK DIAGRAM A0 A1 A2 SCL SDA (1) I/O0 I/O1 8-BIT INPUT FILTER I2C/SMBUS CONTROL WRITE pulse READ pulse INPUT/ OUTPUT PORTS I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 LP FILTER INT VCC VCC VSS POWER-ON...