Status: | Active |
---|---|
Series: | M41ST85W |
RoHS: | Compliant |
Automatic battery switchover and WRITE protect for: Internal serial RTC and External low power SRAM (LPSRAM) |
Internal serial RTC and |
External low power SRAM (LPSRAM) |
400 kHz I2C serial interface |
3.0/3.3 V operating voltage VCC= 2.7 to 3.6 V |
VCC= 2.7 to 3.6 V |
Ultralow battery supply current of 500 nA (max) |
RoHS compliant Lead-free second level interconnect |
Lead-free second level interconnect |
Serial RTC features 400 kHz I2C 44 bytes of general purpose NVRAM Counters for:Seconds, minutes, hours, day, date, month, and yearCenturyTenths/hundredths of secondsClock calibration register allows compensation for crystal variations over temperature Programmable alarm with repeat modesFunctions in battery back-up mode Power-down timestamp (HT bit) 2.5 to 5.5 V oscillator operating voltage |
400 kHz I2C |
44 bytes of general purpose NVRAM |
Counters for:Seconds, minutes, hours, day, date, month, and yearCenturyTenths/hundredths of secondsClock calibration register allows compensation for crystal variations over temperature |
Seconds, minutes, hours, day, date, month, and year |
Century |
Tenths/hundredths of seconds |
Clock calibration register allows compensation for crystal variations over temperature |
Programmable alarm with repeat modesFunctions in battery back-up mode |
Functions in battery back-up mode |
Power-down timestamp (HT bit) |
2.5 to 5.5 V oscillator operating voltage |
Microprocessor supervisor features Programmable watchdog62.5 ms to 128 s time-out period Early power-fail warning circuit (PFI/PFO) with 1.25 V precision reference Power-on reset/low voltage detectOpen drain reset outputReset voltage, VPFD= 2.60 V (nom)Two reset input pinsWatchdog can be steered to reset output |
Programmable watchdog62.5 ms to 128 s time-out period |
62.5 ms to 128 s time-out period |
Early power-fail warning circuit (PFI/PFO) with 1.25 V precision reference |
Power-on reset/low voltage detectOpen drain reset outputReset voltage, VPFD= 2.60 V (nom)Two reset input pinsWatchdog can be steered to reset output |
Open drain reset output |
Reset voltage, VPFD= 2.60 V (nom) |
Two reset input pins |
Watchdog can be steered to reset output |
NVRAM supervisor features Non-volatizes external LPSRAMAutomatically switches to back-up battery and deselects (write-protects) external LPSRAM via chip-enable gatePower-fail deselect (write protect) voltage, VPFD= 2.60 V (nom)Switchover, VSO= 2.50 V (nom) Battery monitor (battery low flag) |
Non-volatizes external LPSRAMAutomatically switches to back-up battery and deselects (write-protects) external LPSRAM via chip-enable gatePower-fail deselect (write protect) voltage, VPFD= 2.60 V (nom)Switchover, VSO= 2.50 V (nom) |
Automatically switches to back-up battery and deselects (write-protects) external LPSRAM via chip-enable gate |
Power-fail deselect (write protect) voltage, VPFD= 2.60 V (nom) |
Switchover, VSO= 2.50 V (nom) |
Battery monitor (battery low flag) |
Other features Programmable squarewave generator (1 Hz to 32 KHz) –40°C to +85°C operation Package options:28-lead SNAPHAT®IC (SOH28) SNAPHAT battery/crystal top to be ordered separately28-lead embedded crystal SOIC (SOX28) |
Programmable squarewave generator (1 Hz to 32 KHz) |
–40°C to +85°C operation |
Package options:28-lead SNAPHAT®IC (SOH28) SNAPHAT battery/crystal top to be ordered separately28-lead embedded crystal SOIC (SOX28) |
28-lead SNAPHAT®IC (SOH28) SNAPHAT battery/crystal top to be ordered separately |
28-lead embedded crystal SOIC (SOX28) |
Product Specifications |
---|
DS2151 3.0/3.3 V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor |
Brochures |
---|
Serial real-time clock ICs |
M41ST Series 3.3 V I2C Serial RTC NVRAM / Microprocessor Superviser - SOH-28 | Future Electronics |
Soh28/I°/512Bit Battery/Rtc + Supervisor | Newark Electronics |
SOH28/I°/512BIT BATTERY/RTC + SUPERVISOR | element14 |
Real Time Clock Serial 64Byte 28-Pin SOH T/R | Avnet America |
Where can I find additional details, specifications and documents for a M41ST85WMH6F?
Additional datasheets, footprints and schematics for M41ST85WMH6F are listed on our Part Details page. You can also find images and similar parts to M41ST85WMH6F on this page.
What pricing and inventory information can I view?
Distributor pricing and stock information is available for M41ST85WMH6F on our Product Comparison page. Access via the 'View Pricing & Stock' button to view M41ST85WMH6F price breaks, MOQs, lead times, inventory and SKUs from distributors.
What category does M41ST85WMH6F fall under?
The M41ST85WMH6F 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 M41ST85WMH6F 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 M41ST85WMH6F you can contact the distributor directly for product support, shipping queries etc.
Is the M41ST85WMH6F RoHS compliant?
Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.
Which authorised distributors for M41ST85WMH6F have stock available?
Authorised distributors including Future Electronics, Newark Electronics, element14, Farnell and Avnet America have stock available or on a lead time for M41ST85WMH6F.
How do I check stock and lead times for all distributors?
Stock availability and lead times will be displayed for M41ST85WMH6F often in real-time on the comparison pages.
What if I can't find stock of M41ST85WMH6F?
You can fill out our help required form which you can use to request a quote for M41ST85WMH6F from some of our verified obsolescence suppliers. Alternatively, contact us via our web chat in the bottom left of your screen and one of our team will try to help.