M41T62LC6F(2019) 查看數據表（PDF） - STMicroelectronics
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M41T62LC6F Datasheet PDF : 42 Pages
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M41T62, M41T64, M41T65
Description
1
Description
The M41T6x is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator. Eight registers are
used for the clock/calendar function and are configured in binary-coded decimal (BCD) format. Further eight
registers provide status/control of alarm, 32 kHz output, calibration, and watchdog functions. Addresses and data
are transferred serially via a two-line, bidirectional I²C interface. The built-in address register is incremented
automatically after each WRITE or READ data byte.
Functions available to the user include a time-of-day clock/calendar, an alarm interrupt (M41T62/M41T65), a 32
kHz output (M41T62/M41T64), a programmable square wave output (M41T62/M41T64), and a watchdog output
(M41T65). The eight clock address locations contain the century, year, month, date, day, hour, minute, second
and tenths/hundredths of a second in 24-hour BCD format. Corrections for 28-, 29- (leap year), 30- and 31-day
months are made automatically.
The M41T6x is supplied in two very small packages: a tiny, 3 x 3 mm 16-pin QFN which requires a user-supplied
32 kHz crystal, and an ultra-small 1.5 x 3.2 mm LCC with embedded crystal - no external crystal is required.
Device
Basic RTC Alarms
M41T62
✓
✓
M41T64
✓
✓
M41T65
✓
✓
Table 1. Device summary
OSC fail
detect
✓
✓
✓
Watchdog timer
✓
✓
✓
Calibration
✓
✓
✓
SQW
output
✓
✓
IRQ output WDO output
✓
✓
✓
F32K
output
✓
Figure 1. M41T62 logic diagram
VCC
XI(3)
XO(3)
SCL
SDA
M41T62
IRQ/OUT(1)
SQW(2)
VSS
1. Open drain.
2. Defaults to 32 kHz on power-up.
3. Not bonded on LCC package.
DS3840 - Rev 24
page 2/42
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