8-bit I2C-bus and SMBus I/O port with reset - # of Addresses: 8 ; I2C-bus: 400 kHz; Max Sink Current per bit: 25 mA; Max Sink Current, per package: 100 mA; Number of bits: 8 ; Operating temperature: -40~85 Cel; Operating voltage: 2.3~5.5 VDC; Reset input pin: yes ; Source Current per bit: 10 mA; Package: SOT629-1 (HVQFN16); Container: Reel Pack, SMD, 13"
The PCA9557BS can support I2C bus frequencies up to 400 kHz.
The PCA9557BS can be configured for 8-bit or 16-bit port expansion by setting the A0 and A1 address pins. For 8-bit expansion, tie A0 and A1 to GND, and for 16-bit expansion, tie A0 to VCC and A1 to GND.
The PCA9557BS can sink or source up to 25 mA per output.
The PCA9557BS can be reset by pulling the RESET pin low for at least 1 ms.
Yes, the PCA9557BS is 5V tolerant, but it is recommended to use a voltage regulator to ensure a stable 3.3V supply to the device.
PCA9557BS,118 datasheet
by NXP Semiconductors
