M41T11MH6F Real-Time Clock (RTC) ICs by STMicroelectronics

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


The M41T11 is a low-power serial real-time clock (RTC) with 56 bytes of NVRAM. A built-in 32.768 kHz 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 M41T11 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 5 years with a 50 mA/h, 3 V lithium cell. The M41T11 is supplied in an 8-lead plastic small outline package or 28-lead SNAPHAT® package. The 28-pin, 330 mil SOIC provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT housing containing the battery and crystal. The unique design allows the SNAPHAT battery package to be mounted on top of the SOIC package after the completion of the surface mount process. Insertion of the SNAPHAT housing after reflow prevents potential battery and crystal damage due to the high temperatures required for device surface-mounting. The SNAPHAT housing is keyed to prevent reverse insertion. The SOIC and battery/crystal packages are shipped separately. For the 28-lead SOIC, the battery/crystal package (i.e. SNAPHAT) part number is “M4Txx-BR12SH”.

Where to Buy

Prices starting from US$3.27

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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 0.8 μA (typ. at 3 V)
2.0 to 5.5 V clock operating voltage
Automatic switchover and deselect 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 to 85°C
Packaging includes a 28-lead SOIC and SNAPHAT®top (to be ordered separately; 3.3 V to 5.0 V supply voltage only)
RoHS compliant Lead-free second level interconnect
Lead-free second level interconnect

Resources





Alternative Descriptions

M41T11 Series 2 to 5.5 V Serial I2C Real Time Clock Surface Mount - SOH-28 | Future Electronics
Real Time Clock Serial 64Byte 28-Pin SOH T/R | Avnet America
512Bit Serial Access Timekeeper Sram | Newark Electronics
512BIT SERIAL ACCESS TIMEKEEPER SRAM | element14
Real Time Clock 56B NVRAM Serial SOH28 | RS


Frequently Asked Questions

Where can I find additional details, specifications and documents for a M41T11MH6F?

Additional datasheets, footprints and schematics for M41T11MH6F are listed on our Part Details page. You can also find images and similar parts to M41T11MH6F on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for M41T11MH6F on our Product Comparison page. Access via the 'View Pricing & Stock' button to view M41T11MH6F price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does M41T11MH6F fall under?

The M41T11MH6F 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 M41T11MH6F 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 M41T11MH6F you can contact the distributor directly for product support, shipping queries etc.

Is the M41T11MH6F RoHS compliant?

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

Which authorised distributors for M41T11MH6F have stock available?

Authorised distributors including Future Electronics, Avnet America, Newark Electronics, element14 and Farnell have stock available or on a lead time for M41T11MH6F.

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