NXP Semiconductors

I²C-bus interface operating supply voltage: 2.5 V to 6 V Clock operating supply voltage 1.0 V to 6.0 V at 0 ℃ to +70 ℃ 240 × 8-bit low-voltage RAM Data retention voltage: 1.0 V to 6.0 V Operating current (at fSCL = 0 Hz): max 50 μA Clock function with four year calendar Universal timer with alarm and overflow indication 24 hour or 12 hour format 32.768 kHz or 50 Hz time base Serial input and output bus (I²C-bus) Automatic word address incrementing Programmable alarm, timer, and interrupt function Slave addresses: A1h or A3h for reading, A0h or A2h for writing