The CS31-32.768K-12.5 from Transko Electronics is a 32.768 kHz tuning-fork crystal resonator in a compact 3.2 x 1.5 mm metal SMD package. With a frequency tolerance of +-20 ppm and a load capacitance of 12.5 pF, it is designed for real-time clock (RTC) and timekeeping applications requiring high accuracy and low power consumption.<\/p>\n
| Frequency<\/td>\n | 32.768 kHz<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||
| Frequency Tolerance<\/td>\n | +-20 ppm at 25 degC<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||
| Load Capacitance<\/td>\n | 12.5 pF<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||
| ESR<\/td>\n | 80 kOhm (max)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||
| Drive Level<\/td>\n | 0.1 uW \/ 1.0 uW (max)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||
| \u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n | -40 to 85 degC<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||
| Aging (1st year)<\/td>\n | +-3 ppm (max)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||
| \u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n | 2-SMD (3.2 x 1.5 x 0.8 mm)<\/td>\n<\/tr>\n<\/table>\n\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\nProduct Overview The CS31-32.768K-12.5 from Transko Electronics is a 32.768 kHz tuning-fork crystal resonator in a compact 3.2 x 1.5 mm metal SMD package. With a frequency tolerance of +-20 ppm and a load capacitance of 12.5 pF, it is designed for real-time clock (RTC) and timekeeping applications requiring high accuracy and low power consumption. […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,55],"tags":[2082],"chip_brand":[2081],"class_list":["post-10742","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-transistors","tag-cs31-32-768k-12-5","chip_brand-transko"],"acf":{"brief_explanation":"32.768kHz tuning-fork crystal, +-20ppm, 12.5pF CL, 80kOhm ESR, 3215 SMD","date_code":"","package_case":"2-SMD (3.2 x 1.5 x 0.8 mm)","in_stock":10416,"datasheet":"https:\/\/www.transko.com\/product_detail.php?idx=31","price":"$0.18 @ 1ku","product_introduction":"The CS31-32.768K-12.5 from Transko Electronics is a 32.768 kHz quartz crystal resonator using a tuning-fork element in a compact 3215 surface-mount metal package. The 32.768 kHz frequency is the standard timebase for real-time clock applications, as 2^15 = 32768, allowing simple binary division to produce 1 Hz. The metal housing provides superior mechanical impact resistance compared to ceramic packages. With a frequency tolerance of +-20 ppm and load capacitance of 12.5 pF, the CS31 series is optimized for low-power oscillator circuits in timekeeping applications.","working_principle":"The CS31-32.768K-12.5 uses a quartz tuning-fork element that vibrates at its natural resonant frequency of 32.768 kHz. The tuning-fork geometry provides a low-frequency oscillation mode with minimal power consumption, making it ideal for battery-backed RTC circuits. The piezoelectric properties of quartz convert mechanical vibration into electrical signals and vice versa. When connected in a Pierce oscillator circuit with an inverting amplifier and load capacitors, the crystal provides frequency-determining feedback with very high Q factor, resulting in a stable and accurate oscillation frequency. The 12.5 pF load capacitance specification defines the external capacitance required for the crystal to oscillate at its nominal frequency.","pin_description":"
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