Diodes Incorporated PT7C43390LE

Description
The PT7C43390 is a CMOS IC-bus real-time clock IC that operates with very low current consumption and a wide range of operation voltage (1.35V to 5.5V). It can be used for various power supplies, from main supply to backup battery. The included free registers can be used as a function for user's backup memory, allowing users to retrieve information stored before power-off after voltage is restored. The IC has a function to correct advance/delay of the clock data speed caused by the oscillation circuit's frequency deviation. By combining this function with a temperature sensor, it is possible to create a high-precise clock function that is not affected by ambient temperature.

Features
Low current consumption: 0.3μA typ. (ViD-30V, T₁ =25°C)
Wide operating voltage range: 1.35 to 5.5 V
Minimum time keeping operation voltage: 1.25V
Built-in clock adjustment function
Built-in free user register
2-wire (FC-bus) CPU interface
Built-in alarm interrupter
Built-in flag generator at power down or power on
Auto calendar up to the year 2099, automatic leap year calculation function
Built-in constant voltage circuit
Built-in 32 kHz crystal oscillator circuit
Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. "Green" Device

Applications
Mobile game device, mobile phone
Industrial control
Electronic power meter
DVD recorder
Car navigation
IP Camera, DVR, NVR