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. An additional 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, alarm interrupts (M41T62/65), 32 KHz output (M41T62/64), programmable square wave output (M41T62/64), and 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.
|DS3840: Low-power serial real-time clocks (RTCs) with alarm||22.0||955 KB|
|AN3060: Applications guide for serial real-time clocks (RTCs)||3.0||878 KB|
|AN1011: Battery technology used in NVRAM and real-time clock (RTC) products from ST||4.0||248 KB|
|AN934: How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products||4.1||123 KB|
|AN1216: Implementing a periodic alarm with TIMEKEEPER® and serial real-time clocks (RTCs)||2.0||192 KB|
|AN4641: Integrating TIMEKEEPER® and real-time clock supervisor functions||1.0||479 KB|
|AN923: Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs||4.0||142 KB|
|AN1572: Power-down time-stamp function in serial real-time clocks (RTCs)||2.0||171 KB|
|AN1336: Power-fail comparator for NVRAM supervisory devices||2.0||127 KB|
|Serial real-time clock ICs||1.0||827 KB|
|Smart watches and fitness bands benefit from the ultra-small date/time chip from STMicroelectronics||1.0||160 KB|
|STEVAL-FET001V1||ST||M41T62LC6F adapter board for a standard DIL 24 socket|
|Part Number||Package||Packing Type||Operating Temperature (°C) (min)||Operating Temperature (°C) (max)||Marketing Status||Unit Price (US$) *||Quantity||NVRAM size (B)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|M41T62LC6F||LCC8 3.2x1.5 mm||Tape And Reel||-40||85||Active : Product is in volume production||2.3||1000||-||EAR99||-||MORE INFO||Buy Direct Add to cart||DISTRIBUTOR AVAILABILITY|
|M41T62Q6F||VFQFPN 16 3x3x0.9||Tape And Reel||-40||85||Active : Product is in volume production||0.8||1000||-||EAR99||MALAYSIA||MORE INFO||Get Sample Add to cart||DISTRIBUTOR AVAILABILITY|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
|M41T62LC6F||Active||LCC8 3.2x1.5 mm||Industrial||Ecopack2|
|M41T62Q6F||Active||VFQFPN 16 3x3x0.9||Industrial||Ecopack2|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.