PCA9501 Datasheet (NXP) - 8-bit I2C and SMBus I/O port

PCA9501, 8-bit I2C and SMBus I/O port

The PCA9501 is an 8-bit I/O expander with an on-board 2-kbit EEPROM.

The I/O expandable 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 master writes to the I/O conﬁguration bi

PCA9501 Features

* I 8 general purpose input/output expander/collector I Replacement for PCF8574 with integrated 2-kbit EEPROM I Internal 256 × 8 EEPROM I Self timed write cycle (5 ms typical) I 16 byte page write operation I I2C-bus and SMBus interface logic I Internal power-on reset I Noise ﬁlter on SCL/SDA inputs I