STMicroelectronics designs the world's smallest clock with an embedded crystal

Small is beautiful: STMicroelectronics, a semiconductor producing company, certainly follows this dictum. In a fascinating turn of events, they have managed to contrive the world's smallest real time clock (RTC) with an embedded crystal. Dubbed as the M41T62, and measuring at only 3.2 x 1.5 mm, this ultra-petite device can actually exhibit time along with ubiquitous clock functions such as calendars and alarms.

Smallest Real-Time Clock

The main body of the clock is made from lead-free ceramic package. Designed to be activated by lithium-ion batteries, the minuscule size of the device also corresponds to the very low power consumed by its intricate system. Testing figures say, this RTC draws around an insignificant 350nA at a range of 1.3V to 4.4V. Because of the advanced integrated technology used in this case, the drawn power is sufficient for the whole to clock to work without the requirement of any external crystal.

The integrated technology also has other related advantages that perk up the overall efficiency of this RTC system. With the simplistic mechanism, the system emanates a substantial (and stable) frequency signal (at 32 kHz), which is comparable to processors like Bluetooth modules. Moreover, intelligent performance enhancing features such as the oscillator failure detection (OFD) helps the system to detect internal power faults.

The functionality of the M41T62 is not limited to its 'time displaying' scope. According to the company, the technology can also be used to improve upon the mechanisms of other gadgets, such as SLR digital cameras, GPS receivers, portable multimedia players, card readers and even portable medical monitors.

Via: ST