PCA9553TK-T 4-bit I2C-bus LED driver with programmable blink rates - # of Addresses: 1 ; I2C-bus: 400 kHz; Max Sink Current per bit: 25 mA; Max Sink Current, per package: 100 mA; Number of bits: 4 ; Operating temperature: -40~85 Cel; Operating voltage: 2.3~5.5 VDC; PWMs: 2 (40 Hz to 6.4 sec)