M41T56M6F Real-Time Clock (RTC) ICs by STMicroelectronics

Serial real-time clock (RTC) with 56 bytes NVRAM


The M41T56 is a low-power, serial real-time clock (RTC) with 56 bytes of NVRAM. A built-in 32,768 Hz oscillator (external crystal controlled) and the first 8 bytes of the RAM 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, bidirectional bus. The built-in address register is incremented automatically after each WRITE or READ data byte. The M41T56 clock has a built-in power sense circuit which detects power failures and automatically switches to the battery supply during power failures. The energy needed to sustain the RAM and clock operations can be supplied from a small lithium coin cell. Typical data retention time is in excess of 10 years with a 50 mAh, 3 V lithium cell. The M41T56 is supplied in an 8-lead plastic SOIC package.

Where to Buy

Prices starting from US$1.31

Distributor Stock
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RS
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4,910
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Future Electronics
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Newark Electronics
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element14
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Farnell
from US$1.97
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Avnet Silica
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Avnet America
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EBV Elektronik
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Features

Counters for seconds, minutes, hours, day, date, month, years, and century
32 KHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation
Serial interface supports I2C bus (100 kHz protocol)
Ultra-low battery supply current of 450 nA (typ at 3 V)
5 V ±10% supply voltage
Timekeeping down to 2.5 V
Automatic power-fail detect and switch circuitry
56 bytes of general purpose RAM
Software clock calibration to compensate crystal deviation due to temperature
Automatic leap year compensation
Operating temperature of –40 °C to 85 °C
Available in an 8-lead, 150-mil, plastic SOIC (SO8)
RoHS compliant Lead-free second level interconnect
Lead-free second level interconnect

Resources





Alternative Descriptions

M41T56 Series 5.5 V I2C / 2-Wire /Serial Surface Mount Real Time Clock - SOIC-8 | Future Electronics
Real Time Clock/Calendar, Binary, Soic-8 | Newark Electronics
REAL TIME CLOCK/CALENDAR, BINARY, SOIC-8 | element14
Real Time Clock 56B NVRAM Serial SOIC8 | RS
Real Time Clock Serial 64Byte 8-Pin SO N T/R | Avnet Silica


Frequently Asked Questions

Where can I find additional details, specifications and documents for a M41T56M6F?

Additional datasheets, footprints and schematics for M41T56M6F are listed on our Part Details page. You can also find images and similar parts to M41T56M6F on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for M41T56M6F on our Product Comparison page. Access via the 'View Pricing & Stock' button to view M41T56M6F price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does M41T56M6F fall under?

The M41T56M6F is listed under Clocks and Timers > Real-Time Clock (RTC) ICs > RTC - Serial Interface.

Can I view similar or alternative parts?

You can view similar parts to M41T56M6F when available in the RTC - Serial Interface range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the M41T56M6F you can contact the distributor directly for product support, shipping queries etc.

Is the M41T56M6F RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.

Which authorised distributors for M41T56M6F have stock available?

Authorised distributors including Future Electronics, Newark Electronics, element14, Farnell and RS have stock available or on a lead time for M41T56M6F.

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