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M41T62 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. M41T62
Description  Serial Access Real-Time Clock with Alarms
Download  40 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T62 Datasheet(HTML) 1 Page - STMicroelectronics

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August 2006
Rev 11
1/41
1
M41T62, M41T63
M41T64, M41T65
Serial Access Real-Time Clock with Alarms
Feature summary
Counters for tenths/hundredths of seconds,
seconds, minutes, hours, day, date, month,
year, and century
32 KHz crystal oscillator integrating load
capacitance and high crystal series resistance
operation
Oscillator stop detection monitors clock
operation
Serial interface supports I2C bus (400kHz)
350nA timekeeping current @ 3V
Low operating current of 35
µA (@400kHz)
Timekeeping down to 1.0V
1.3V to 4.4V I2C bus operating voltage
32KHz square wave on power-up to drive a
microcontroller in low power mode
(M41T62/63/64)
Programmable (1Hz to 32KHz) square wave
(M41T63/64)
Programmable alarm with interrupt function
(M41T62/65)
Accurate programmable watchdog
(from 62.5ms to 31 min)
Software clock calibration to compensate
deviation of crystal due to temperature
Automatic leap year compensation
Operating temperature of –40 to 85°C
Lead-free 16-pin QFN package
Lithium ion rechargeable operation
Table 1
QFN16 (Q) 3mm x 3mm
1
XI
2
XO
3
4
AI11107
ST QFN16
SMT
CRYSTAL
VSOJ20 (47.6mm2)
Guard Ring
(21.5mm2)
GND Plane
32KHz crystal + QFN 16 vs. VSOJ20
Table 1.
Device options
Basic RTC
Alarms
OSC fail
detect
Watchdog
timer
Calibration
SQW
output
IRQ
output
WDO
output
F32K
output
M41T62
✔✔
M41T63
✔✔
M41T64
✔✔
M41T65
✔✔
www.st.com


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