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STMicroelectronics unveils world’s smallest real-time clock with embedded crystal
As miniaturization continues to be a key goal for designers of high-tech gadgets, STMicroelectronics has announced the world’s smallest combined crystal and real-time clock (RTC) IC for time, calendar and alarm functions. ST has combined the world’s smallest real-time clock die and a matched oscillator crystal in the same package size as the smallest crystal-only devices on the market today, to deliver the world’s smallest integrated RTC/crystal, measuring only 3.2 x 1.5mm and offering ultra-low power consumption.
The M41T62 is ideally suited to the needs of battery-powered designs. By operating at low voltages from 1.3V to 4.4V, it can be driven directly from a Li-ion battery and draws only 350nA. Many integrated microcontrollers have an on-chip RTC, but these often provide limited features and an external crystal is always required. Unlike designing with microcontrollers, or discrete solutions, this integrated solution takes care of the required and sometimes troublesome matching of the crystal and the RTC.
The M41T62 also simplifies product design. It produces a stable 32kHz signal on start-up, which ensures reliable starting from many of today’s processors and subsystems such as Bluetooth modules. Additional features enhancing design and system performance include oscillator failure detection (OFD), which helps the system detect power faults. Actions such as power-down time stamping, low-battery detection or the switch-over to a back-up battery can be done without any additional external components. The device is also UL certified and has a built-in reverse current diode.
The M41T62 improves the performance of systems whose functions rely on data logging, time stamping, interval monitoring or synchronization. These can be found in SLR digital cameras, GPS receivers, portable multimedia players, card readers, portable medical monitors such as glucose meters.
Major features of the M41T62
• 3.2 x 1.5mm lead-free ceramic package
• RTC and crystal within industry’s smallest crystal-only outline
• Ultra-low power consumption of 350nA @ 3 V
• Low operating voltage: 1.3V – 4.4V
• Provides stable 32kHz on power-up
• Oscillator failure detection ensuring safe operation
• Timekeeping down to 1.0V
• Programmable alarm and watchdog
Click here to download the datasheet.
For more information, or details on the full range of STMicroelectronics products available from Anglia, please email info@anglia.com
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This news article was originally published in October 2011.
