"Watch" quartz resonators in mini cases 2012 and 3215 from SJK

Quartz clock frequency resonators or so–called quartz clock resonators with a frequency of 32.768 kHz (or 32768 Hz) are one of the most popular resonators used in electronics today. The term "clockwork" indicates the fact that the main field of application of resonators of this frequency are clock circuits. The resonant frequency of the clock resonators of 32.768 kHz, divided by a 15-bit binary counter, gives a time interval of 1 second.

Shenzhen Crystal Technology Industrial Co., Ltd. (SJK) produces high-quality quartz resonators with a frequency of 32768 Hz in miniature cases, for surface mounting, measuring 2.0×1.2×0.6 mm 7R series and 3.2×1.5×0.75 mm 7L series.

The series have a sealed ceramic housing with two contact pads. The resonators have a high accuracy of ±20ppm and have an operating temperature range of -40°From up to +85°C. The products comply with international ROHS standards. The packaging is a standard tape for automated installation of resonators on the board.

Quartz resonators of these series have high stability and reliability in operation.

The main application is in small electronics, watches and telecommunication equipment.