PCA9557 Datasheet | NXP Semiconductors

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 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. 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 polarity inversion register - I2C and SMBus interface logic - Internal power-on reset - Noise filter on SCL/SDA inputs - Active LOW reset input - 3 address pins allowing up to 8 devices on the I2C/SMBus - High impedance open drain on I/O0 - No glitch on power-up - Power-up with all channels configured as inputs - Low standby current - Operating power supply voltage range of 2.3 V to 5.5 V - 5 V tolerant inputs/outputs - 0 to 400 k Hz clock frequency - ESD protection exceeds 2000 V HBM per...