The SWS3127D48-32.768K is a 32.768kHz tuning fork crystal from Suntsu Electronics in a compact 3.2 x 1.5mm ceramic SMD package. It provides the standard 32.768kHz frequency used for real-time clock (RTC) timekeeping. The 7pF load capacitance and 70kOhm ESR are optimized for low-power oscillator circuits.<\/p>\n
| Frequency<\/td>\n | 32.768 kHz<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||
| Frequency Tolerance<\/td>\n | +-20 ppm<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||
| Load Capacitance<\/td>\n | 7 pF<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||
| ESR<\/td>\n | 70 kOhms (max)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||
| Operating Mode<\/td>\n | Fundamental (Tuning Fork)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||
| Paquete<\/td>\n | 2-SMD (3.2 x 1.5 x 0.80 mm)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||
| Temperatura de funcionamiento<\/td>\n | -40C to +85C<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||
| MSL<\/td>\n | 1 (Unlimited)<\/td>\n<\/tr>\n<\/table>\nCaracter\u00edsticas<\/h2>\nAplicaciones<\/h2>\nProduct Overview The SWS3127D48-32.768K is a 32.768kHz tuning fork crystal from Suntsu Electronics in a compact 3.2 x 1.5mm ceramic SMD package. It provides the standard 32.768kHz frequency used for real-time clock (RTC) timekeeping. The 7pF load capacitance and 70kOhm ESR are optimized for low-power oscillator circuits. Key Specifications Frequency 32.768 kHz Frequency Tolerance +-20 […]<\/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":[13,20],"tags":[937],"chip_brand":[936],"class_list":["post-9661","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-sws3127d48-32-768k","chip_brand-suntsu"],"acf":{"brief_explanation":"32.768kHz tuning fork crystal, 7pF CL, +-20ppm, 70kOhm ESR, 3.2x1.5mm SMD","date_code":"","package_case":"2-SMD (3.2 x 1.5 x 0.80 mm)","in_stock":12350,"datasheet":"https:\/\/www.alldatasheet.com\/datasheet-pdf\/pdf\/1295278\/SUNTSU\/SWS3127D48.html","price":"$0.46 @ 100pc","product_introduction":"The Suntsu Electronics SWS3127D48-32.768K is a 32.768kHz tuning fork (watch) crystal in a miniature 3.2 x 1.5mm ceramic SMD package. The 32.768kHz frequency is the universal standard for real-time clock (RTC) timekeeping, as dividing by 2^15 yields exactly 1Hz for seconds counting. The 7pF load capacitance makes this crystal well-suited for modern low-power MCU on-chip oscillator circuits. The 70kOhm maximum ESR is within the drive capability of most integrated Pierce oscillators found in ARM Cortex-M and other popular MCU families. The 3.2 x 1.5mm footprint is significantly smaller than older 3.2 x 2.5mm crystal packages, saving valuable PCB area.","working_principle":"The SWS3127D48-32.768K uses a synthetic quartz crystal element cut in the tuning fork (XY-flexure) orientation, which vibrates at its natural resonance frequency of 32,768Hz. The tuning fork geometry provides excellent frequency stability over temperature (parabolic temperature coefficient with turnover near 25C) while maintaining a compact physical size. When connected across the amplifier pins of a Pierce oscillator circuit (typically integrated in an MCU), the crystal establishes a feedback loop that oscillates at precisely 32,768Hz. The external load capacitors (total of 7pF including PCB stray capacitance) shift the oscillation frequency to the specified value.","pin_description":"
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