Manufacturer Part Number
M41ST85WMH6E
Manufacturer
STMicroelectronics
Introduction
The M41ST85WMH6E is a multifunctional integrated real-time clock and NVRAM supervisor.
Product Features and Performance
Alarm function
Support for Leap Year
44B of NVSRAM
Square Wave Output
Supervisor circuitry
Watchdog Timer for system reset
Support for 24-hour time format HH:MM:SS:hh
Date format YY-MM-DD-dd
I2C 2-Wire Serial interface for communication
Product Advantages
Battery-backed non-volatile storage
Low timekeeping current of maximum 0.5mA
Built-in alarms and timers for complex scheduling
Key Technical Parameters
Memory Size: 44 bytes
Time Format: HH:MM:SS:hh (24 hr)
Date Format: YY-MM-DD-dd
Interface: I2C, 2-Wire Serial
Voltage - Supply: 2.7V to 3.6V
Voltage - Supply, Battery: 2.5V to 3.5V
Current - Timekeeping (Max): 0.5mA @ 2.7V to 3.6V
Operating Temperature: -40°C to 85°C
Quality and Safety Features
Robust operation in extended temperature range
Compatibility
Surface Mount compatible
28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets
Supplier Device Package: 28-SOH
Application Areas
Suitable for a wide range of applications requiring timekeeping and data storage
Product Lifecycle
Product Status: Obsolete
End of life with limited replacement options
Several Key Reasons to Choose This Product
Highly integrated RTC with backup NVSRAM
Low power consumption for battery preservation
Incorporated watchdog timer to prevent system failures
Comprehensive feature set including alarms and leap year correction
Durable and reliable for harsh temperature environments
Multiple interface options for greater design flexibility
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