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PCA9557 Datasheet 8-bit I2c And Smbus I/0 Port With Reset

Manufacturer: NXP Semiconductors

Overview: 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 puts the registers in their default state and initializes the I2C/SMBus state machine. The RESET pin causes the same reset/initialization to occur without depowering the part.

General Description

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, I/O0.

Key Features

  • PCA9556 PIN.

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PCA9557 Distributor