PCA9500BS,118

PCA9500BS,118 is an 8bit I/O expander with an on-board 2Kbit EEPROM. The I/O expander's eight quasi-bidirectional data pins can be independently assigned as inputs or outputs to monitor board level status or activate indicator devices such as LEDs. The system host writes to the I/O configuration bits in the same way as for the PCF8574. The data for each input or output is kept in the corresponding Input or Output register. Typical applications include board version tracking and configuration, board health monitoring and status reporting, multi-card systems in telecommunications, networking, and base station infrastructure equipment, field recall and troubleshooting functions for installed boards, general-purpose integrated I/O with memory, drop-in replacement for PCF8574 with integrated 2-kbit EEPROM, three hardware address pins allow up to eight PCA9500s to be located in the same I2C-bus/SMBus.

• Operating power supply voltage range of 2.5V to 3.6V and 5V tolerant inputs/outputs
• Eight general purpose input/output expander/collector
• Drop-in replacement for PCF8574 with integrated 2-kbit EEPROM
• Internal 256 x 8 EEPROM, self timed write cycle and 4 byte page write operation
• I2C-bus and SMBus interface logic, internal power-on reset and noise filter on SCL/SDA inputs
• Three address pins allowing up to eight devices on the I2C-bus/SMBus
• No glitch on power-up, supports hot insertion and low standby current
• Power-up with all channels configured as inputs
• 0Hz to 400kHz clock frequency
• 16 lead HVQFN package, operating temperature range from -40°C to +85°C