PCA9557 Datasheet (NXP) - 8-bit I2C and SMBus I/0 port with reset

PCA9557, 8-bit I2C and SMBus I/0 port with reset

The PCA9557 is a silicon CMOS circuit which provides parallel input/output expansion for SMBus and I2C applications.

The PCA9557 consists of an 8-bit input port register, 8-bit output port register, and an I2C/SMBus interface.

It has low current consumption and a high impedance open drain output pin

INTEGRATED CIRCUITS PCA9557 8-bit I2C and SMBus I/0 port with reset Product data File under Integrated Circuits ICL03 2001 Dec 12 Philips Semiconductors Philips Semiconductors Product data 8-bit I2C and SMBus I/0 port with reset PCA9557 The system master can also invert the PCA9557 inputs by writing to the active HIGH polarity inversion register.

Finally, the system master can reset the PCA9557 in the event of a timeout by asserting a LOW in the reset input.

The power-on reset p

PCA9557 Features

* PCA9556 PIN CONFIGURATION SCL 1 SDA 2 16 VDD 15 RESET 14 I/O7 13 I/O6 12 I/O5 11 I/O4 10 I/O3 9 I/O2

* Lower voltage, higher performance migration path for the

* 8 general purpose input/output expander/collector

* Input/output configuration register

* Active HIGH po