Key facts
- Brand
- STMicroelectronics
- Model
- M41T00
- Category
- Other Electronics
- Documents
- 5
- Languages
- EN
- Last added
- 2012-08-09
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STMicroelectronics M41T00S Serial Access Real-Time Clock Manual
The M41T00S is a low‑power serial access real‑time clock (RTC) with an integrated 32.768 kHz crystal‑controlled oscillator. It offers BCD‑coded calendar registers, automatic leap‑year handling, ultra‑low battery backup, and an I²C two‑wire serial interface for easy integration.
This manual includes a features summary, detailed pin‑out and package information, bus protocol description, read/write operation sequences, clock calibration, power‑fail detection, maximum ratings, and mechanical data. It also provides revision history and reference to related application notes.
STMicroelectronics M41T00 specifications
| Power-fail deselect threshold | 2.6 V (typ) |
|---|---|
| Operating temperature | 0 to 70 °C |
| Battery backup duration | 10 years |
| Oscillator frequency | 32.768 kHz |
All STMicroelectronics M41T00 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How long does the backup battery last?
The internal lithium coin cell can sustain timekeeping operation for 10 years in the absence of system power.
Does the device support leap years?
Yes, corrections for the number of days in a month, including leap year, are made automatically up to the year 2100.
What is the typical data retention time?
Typical data retention times will be in excess of 5 years with a 50 mAh 3 V lithium cell.
From: STMicroelectronics M41T00AUD Serial RTC with Audio Datasheet
Does the device support automatic backup switchover?
Yes, it has an automatic backup switchover circuit that detects power failures and switches to the backup input.
From: STMicroelectronics M41T00AUD Serial RTC with Audio Datasheet
Does the M41T00S support leap years?
Yes, the device automatically makes corrections for 28, 29, 30, and 31 day months, with leap year validity until the year 2100.
From: STMicroelectronics M41T00S Serial Real-Time Clock Datasheet
What is the operating voltage range for this clock?
The device operates with a clock supply voltage between 2.0 V and 5.5 V.
From: STMicroelectronics M41T00S Serial Real-Time Clock Datasheet