St to launch high stability real time clock chip for smart meter

The Italian-French semiconductor (ST) offers a real-time clock wafer with low power consumption, high precision temperature compensation, new product lock-in applications that require stability and precise pulse functions, including electronic watches, medical devices and industrial systems.

Under the normal operation of temperature compensation function, the typical power consumption is only the 0.8µa,m41tc8025 single chip real-time clock in the market at the same time the lowest power consumption, help reduce the working cost of the meter, prolong the service life of battery-powered equipment. The temperature compensation function ensures that the timing error is less than 2.5 minutes per year (±5 ppm) within the specified operating temperature range of 40°c to +85°c. In the application of the meter, the high-precision clock ensures the precision of the time stamp (stamping), which enables the electric meters to convert the electricity price accurately in different seasons and climates.

M41TC8025 shows another advantage in the product testing of key customers: excellent corrosion resistance. The customer is a professional manufacturer of outdoor watches, products are mainly used in harsh working environment, such as coastal areas. Their corrosion-resistant test results show that the new single crystal of the Italian-French semiconductor is much more corrosion-resistant than its peers in real time, and the plateau is a high-quality packaging design and material for the Italian-French semiconductor.

m41tc8025 can accurately calculate seconds, minutes, time messages and calendar messages for weeks, days, months, and years, to help developers simplify system design, and to integrate a number of practical functions such as alarm clock, fixed cycle timer, time update interrupt, and programmable frequency output. The product integrates a 32768Hz quartz crystal oscillator with temperature compensation function to provide accurate time base (timing reference) for components. In addition, the integrated crystal oscillator can reduce the number of external components and further simplify the system hardware design.

Main features of m41tc8025:

· Typical operating current for 0.8μa when 3.0V power supply

· Ensure accuracy within the specified operating temperature range: Within 40 to 85°c range, maximum error ±5.0ppm (approx. 2.5 minutes per year): Maximum error ±3.8ppm (less than 2 minutes per year) in 0 to 50°c range

· Built-in high stability 32KHz temperature compensated quartz crystal oscillator

· Time calendar reminders (disruptive)

· Fixed Cycle timer Interrupt function

· Time Update interrupt Feature

· Programmable frequency output (1hz,1024hz and 32768H)

· 400kHz I²c Interface

The Italian-French semiconductor has started to provide m41tc8025 samples to key customers, packaged with SO-14 stickers, and was produced in November 2012.