Manufacturer Part Number
M41ST85WMX6
Manufacturer
stmicroelectronics
Introduction
The M41ST85WMX6 is a clock/calendar real-time clock from STMicroelectronics, integrating features like alarms, leap year adherence, NVSRAM, a square wave output, supervisor, and watchdog timer functionalities.
Product Features and Performance
Clock/Calendar Type
Integrated Alarm Function
Leap Year Compatibility
NVSRAM for data storage
Square Wave Output for periodic interrupts
Supervisor for system integrity checks
Watchdog Timer to prevent system freezes
Product Advantages
Comprehensive timekeeping features integrated into a single chip
NVSRAM enhances data retention under power loss condition
Built-in supervisor and watchdog improve reliability and reduce system errors
Key Technical Parameters
Memory Size: 44B
Time Format: HH:MM:SS:hh (24-hour format)
Date Format: YY-MM-DD-dd
Interface: I2C, 2-Wire Serial
Voltage Supply Range: 2.7V ~ 3.6V
Battery Voltage Supply Range: 2.5V ~ 3.5V
Current Timekeeping (Max): 0.5mA @ 2.7V ~ 3.6V
Operating Temperature: -40°C ~ 85°C
Mounting Type: Surface Mount
Package/Case: 28-SOIC (0.295", 7.50mm Width)
Quality and Safety Features
Operates across a wide range of temperatures from -40°C to 85°C ensuring reliability in diverse environments
Low timekeeping current maximizes battery life
Compatibility
Compatible with systems requiring I2C or 2-wire serial interface for integration
Application Areas
Embedded systems requiring reliable timekeeping and system integrity monitoring
Consumer electronics
Industrial applications
Product Lifecycle
Status: Obsolete
Replacement products or upgrades may be available, consultation with STMicroelectronics recommended
Several Key Reasons to Choose This Product
Incorporates multiple necessary features for comprehensive time management and system control within one component
Reduces additional component needs with built-in NVSRAM, reducing system complexity
High reliability through integrated supervisor and watchdog components
Suitable for varied applications due to flexible voltage requirements and temperature resilience
Ensures long-term availability of data with low power consumption and battery-backed storage capabilities