SII Semiconductor Corporation S-35390A-J8T1G

Description
The S-35390A is a CMOS 2-wire real-time clock IC that operates with low current consumption over a wide range of operating voltages (1.3 V to 5.5 V). This allows it to be used with various power supplies, from main supply to backup battery. The low current consumption (0.25 μA typ.) and wide range of power supply voltage at timekeeping extend battery life. In systems with a backup battery, the included free registers can be used as a user backup memory function. Users can retrieve information stored in the registers before power-off after the voltage is restored.
The S-35390A has a function to correct advance/delay of the clock data speed caused by the crystal oscillation circuit's frequency deviation. By combining this function with a temperature sensor and correcting according to temperature change, it is possible to create a high-precision clock function that is not affected by ambient temperature.

Features
Low current consumption: 0.25 μA typ. (VDD = 3.0 V, Ta 25°C)
Wide range of operating voltage: 1.3 V to 5.5 V
Built-in clock correction function
Built-in free user register
2-wire (I²C-bus) CPU interface
Built-in alarm interrupter
Built-in flag generator during detection of low power voltage or at power-on
Auto calendar up to the year 2099, automatic leap year calculation function
Built-in constant voltage circuit
Built-in 32.768 kHz crystal oscillator (built-in C, external C₁₂)
Lead-free, Sn 100%, halogen-free

Applications
Mobile game devices
Mobile AV devices
Digital still cameras
Digital video cameras
Electronic power meters
DVD recorders
TVs, VCRs
Mobile phones, PHS