M41T01M6F 实时时钟芯片

M41T01M6F

实时时钟 Low-Pwr serial RTC W/ battry switchover

Low-power serial real-time clock (RTC)   with built-in battery switchover circuit

Description M41T01M6F

The M41T01M6F M41T01 is a low-power serial real-time clock (RTC). The built-in 32.768 kHz oscillator circuit works with an external crystal and does not need any load capacitors.

The M41T01 clock has a built-in power sense circuit which detects power failures and automatically switches to the battery supply during power failures. Eight bytes of the RAM are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format. Addresses and data are transferred serially via a two-line bidirectional bus. The built-in address register is incremented automatically after each WRITE or READ data byte. The energy needed to sustain the RAM and clock operations can be supplied from a small lithium coin cell.

Features M41T01M6F

 2.0 to 5.5 V clock operating voltage

 Counters for seconds, minutes, hours, day,

date, month, years, and century

 Software clock calibration

 Automatic switchover and deselect circuitry

 Ultra-low battery supply current of 800 nA

 Low operating current of 300 μA

 Battery and capacitor backup

 Battery backup not recommended for 3.0 V

applications (capacitor backup only)

 Operating temperature of –40 to 85 °C

 Automatic leap year compensation