Real Time Clocks (RTCs) ensure accurate time measurement in laptops, smartphones, metering and numerous other electronic devices. At the heart of each RTC there is usually a tuning fork quartz crystal with a frequency of exactly 32.768 kHz.
Jauch Quartz developed the new oscillators JO22 32.768 kHz and JO32 32.768 kHz especially for these applications. In contrast to tuning fork-based oscillators, these new Jauch components use an AT-cut quartz blank and thus feature a significantly superior frequency stability.
In a temperature range between -20°C and 70°C a frequency stability of ± 25 ppm is achieved. In the extended temperature range between -40°C and 85°C ± 30 ppm is possible and even at extreme heat of up to 125°C the oscillators reliably generate the desired frequency to ± 100 ppm.
Just like the JO22 and JO32 oscillators for the MHz range that were introduced last year, the new Jauch components for 32.768 kHz operate with a variable supply voltage between 1.8 V and 3.3 V. Within this range, variations in the operating voltage have no negative effect on frequency stability.
The JO22 32.768 kHz and the JO32 32.768 kHz have an LVCMOS-compatible output signal which is suitable for operating standard logic circuits. Thanks to their ultra-compact miniature SMD packages of only 2.5 mm x 2.0 mm x 0.8 mm and 3.2 mm x 2.5 mm x 1.0 mm, respectively, the oscillators are ideally suited for the development of particularly small PCBs and circuits within various applications.
The oscillators are 100 percent lead-free and RoHS and REACH compliant. Both components comply to conflict minerals regulations.