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The M41T60 Serial Access TIMEKEEPER® is a low power Serial RTC with a built-in 32.768kHz oscillator (external crystal controlled). Eight registers 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 bi-directional bus. The built-in address register is incremented automatically after each WRITE or READ data byte.
The eight clock address locations contain the century, year, month, date, day, hour, minute, and second; in 24-hour BCD format. Corrections for 28-, 29- (leap year), 30-, and 31-day months are made automatically.
The M41T60 is supplied in 16-lead QFN package.
M41T60 Maximum Ratings
Symbol
Parameter
Conditions(1)
Value(2)
Unit
TSTG
Storage Temperature (VCC Off, Oscillator Off)
55 to 125
VCC
Supply Voltage
0.3 to 4.6
V
TSLD(3)
Lead Solder Temperature for 10 Seconds
240
VIO
Input or Output Voltages
0.2 to Vcc+0.3
V
IO
Output Current
20
mA
PD
Power Dissipation
1
W
VESD(HBM)
Electro-static discharge voltage (Human Body Model)
TA = 25°C
>1000
V
VESD(RCDM)
Electro-static discharge voltage (Robotic Charged Device Model)
TA = 25°C
>1000
V
Note: 1. Test conforms to JEDEC standard. 2. Data based on characterization results, not tested in production. 3. Reflow at peak temperature of 260°C (total thermal budget not to exceed 245°C for greater than 30 seconds).
M41T60 Features
` 350nA TIMEKEEPING CURRENT @ 3V ` TIMEKEEPING DOWN TO 1.0V ` 1.3V TO 3.6V I2C BUS OPERATING VOLTAGE ` COUNTERS FOR SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEARS, AND CENTURY ` SERIAL INTERFACE SUPPORTS I2C BUS (400kHz) ` SOFTWARE CLOCK CALIBRATION ` LOW OPERATING CURRENT OF 35A ` OSCILLATOR STOP DETECTION ` AUTOMATIC LEAP YEAR COMPENSATION ` SOFTWARE PROGRAMMABLE OUTPUT (OUT) ` OPERATING TEMPERATURE OF 40 TO 85°C ` LEAD-FREE 16-PIN QFN PACKAGE ` TOTAL SURFACE AREA OF IC AND 32KHz CRYSTAL IS 21.5mm2