M41T00CAP 串行访问实时时钟积分备用电池
The M41T00CAP is a low-power serial RTC with integral battery and crystal in ST’s 24-pin CAPHAT? package. It includes a crystal controlled, 32.768 kHz oscillator and has a built-in power sense circuit which detects power failures and automatically switches to the backup battery when a power failure occurs.
Eight registers (see Table 2 on page 14) comprise the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data are transferred serially via an industry standard, two line, 400 kHz, bidirectional I2C interface. The built-in address register is incremented automatically after each WRITE or READ data byte. The internal lithium coin cell contains ample energy to sustain timekeeping operation for 10 years in the absence of system power. The eight clock address locations contain the century, year, month, date, day, hour, minute, and second in 24-hour BCD format. Corrections for the number of days in a month, including leap year, are made automatically (leap year valid up to year 2100).
M41T00CAP 产品特性:
- Real-time clock with backup battery integrated into package
- Uses M41T00S enhanced RTC with precision switchover reference
- 400 kHz I2C serial interface
- Automatic switchover and deselect circuitry
with fixed reference voltage
– VCC = 2.7 to 5.5 V operating voltage range
– 2.6 V (typ) power-fail deselect (switchover) threshold - Counters for seconds, minutes, hours, day, date, month, year and century
- Software clock calibration
- Low operating current of 300 μA
- Oscillator stop detection
- Battery backup
- Operating temperature of 0 to 70°C
- Self-contained battery and crystal in CAPHAT? DIP package
- RoHS compliant
– Lead-free second level interconnect
M41T00CAP 技术支持与电子电路设计开发资源下载
- M41T00CAP 数据手册DataSheet下载.PDF
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