Key facts
- Brand
- STMicroelectronics
- Model
- M41T56
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-09
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STMicroelectronics M41T56 Serial RTC with NVRAM Datasheet
The M41T56 is a low-power, serial real-time clock (RTC) with 56 bytes of non-volatile RAM (NVRAM). It features a built-in 32,768 Hz oscillator controlled by an external crystal and uses a two-line, bidirectional serial bus for data transfer. The device includes automatic power-fail detection and switching to a battery supply to maintain timekeeping and data retention.
Read onlineSTMicroelectronics M41T56 specifications
| Oscillator frequency | 32,768 Hz |
|---|---|
| NVRAM capacity | 56 bytes |
| Supply voltage | 2.5 V to 5 V |
| Battery supply current | 450 nA |
| Operating temperature | -40 °C to 85 °C |
| Package type | 8-lead SOIC |
Source: STMicroelectronics M41T56 Serial RTC with NVRAM Datasheet
All STMicroelectronics M41T56 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the slave address for the M41T56?
The correct slave address is 0h.
From: STMicroelectronics M41T56 Serial RTC with NVRAM Datasheet
How long is the typical data retention time?
Typical data retention time is in excess of 10 years with a 50 mAh, 3 V lithium cell.
From: STMicroelectronics M41T56 Serial RTC with NVRAM Datasheet
What supply voltage does the M41T56 require?
It operates from a 5 V supply with a tolerance of plus or minus 10 %.
From: STMICROELECTRONICS M41T56 512 bit (64 bit x8) Serial Access TIMEKEEPER SRAM handbook
How long can the M41T56 retain data with a lithium battery?
Data can be retained for more than 10 years when powered by a 50 mAh, 3 V lithium coin cell.
From: STMICROELECTRONICS M41T56 512 bit (64 bit x8) Serial Access TIMEKEEPER SRAM handbook