Features and benefits

• Voltage range addresses common supply rails

– VDD supply voltage from 1.7 V to 3.6 V

– VBAT battery supply voltage from 1.55 V to 3.6 V

• Two independent I2C interfaces with up to 400 kHz speed

– Primary I2C bus with Read/write capability on RTC and SRAM registers

– Secondary I2C bus with read/write capability on RTC and SRAM registers enabled by primary I2C

– Both I2C interface supports clock timeout of 35 ms max

• Crystal compatibility & accuracy

– Quartz oscillator circuit with integrated load capacitors (no external capacitors required)

– Configurable: CL = 6 pF, CL = 7 pF, or CL = 12.5 pF

– Time accuracy adjustment via programmable offset register

• RTC feature set

– Aligns with MC146818B register definition for server applications

– Active low ALRT (interrupt) output

– Automatic timestamp and random code generation

– Supports binary/BCD mode, 24-hr/12-hr mode and daylight savings mode

– Battery-backed 128 byte SRAM

– SRAM clear by RTC_CLR pin

– Dedicated I2C addresses for RTC and SRAM

• Package

– HVSON12; 3 mm x 3 mm x 0.85 mm body, 0.5 mm pitch

– Ambient operating temperature from -40 °C to +85 °C

Applications

• Server and computer precision timekeeping

• Network-powered and industrial electronics

• Products with long automated unattended operation time

• White goods

• Servers with a bootable CPU

• Systems with dual I2C architecture