PCA9501 - NXP

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 bits in the same way as for the PCF8574. The data for each inp.

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 Active LOW interrupt output I 6 address pins allowing up to 64 devices on the I2C-bus/SMBus I No glitch on power-up I Supports hot insertion I Power-up with all channels configured as inputs NXP Semiconductors PCA9501 8-bit I2C-bus and SMBus I/O port with interrupt, 2-kbit EEPROM I Low standby cu.