{"id":10293,"date":"2026-07-09T12:07:12","date_gmt":"2026-07-09T12:07:12","guid":{"rendered":"https:\/\/materialparts.com\/dt-26-32-768khz\/"},"modified":"2026-07-09T12:07:12","modified_gmt":"2026-07-09T12:07:12","slug":"dt-26-32-768khz","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/dt-26-32-768khz\/","title":{"rendered":"DT-26 32.768KHZ"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The DT-26 32.768KHZ from KDS (Daishinku Corporation) is a 32.768 kHz tuning fork quartz crystal in a cylindrical 2x6mm through-hole package. This is one of the most widely used timekeeping crystals in the electronics industry, providing the standard 32.768 kHz reference frequency for real-time clock (RTC) circuits in watches, clocks, and embedded systems.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0634\u0631\u0643\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629<\/td>\nKDS (Daishinku Corporation)<\/td>\n<\/tr>\n
Frequency<\/td>\n32.768 kHz<\/td>\n<\/tr>\n
Crystal Type<\/td>\nTuning Fork (NT-cut \/ XY-cut)<\/td>\n<\/tr>\n
Frequency Tolerance<\/td>\n\u00b120 ppm at 25\u00b0C<\/td>\n<\/tr>\n
Load Capacitance<\/td>\n12.5 pF<\/td>\n<\/tr>\n
ESR (Series Resistance)<\/td>\n40 kOhm max (50 kOhm per some grades)<\/td>\n<\/tr>\n
Drive Level<\/td>\n1.0 \u00b5W max<\/td>\n<\/tr>\n
Aging (1st year)<\/td>\n< \u00b13 ppm<\/td>\n<\/tr>\n
Turnover Temperature<\/td>\n25 \u00b1 5\u00b0C<\/td>\n<\/tr>\n
Parabolic Coefficient<\/td>\n-0.04 ppm\/\u00b0C\u00b2 max<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +85 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nDT-26 Cylindrical (2.0 x 6.0 mm), 2-pin through-hole<\/td>\n<\/tr>\n
RoHS<\/td>\n\u0645\u062a\u0648\u0627\u0641\u0642<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 32.768 kHz tuning fork quartz crystal<\/li>\n
  • Industry-standard DT-26 cylindrical 2x6mm package<\/li>\n
  • 12.5 pF load capacitance matching most RTC ICs<\/li>\n
  • \u00b120 ppm frequency tolerance at 25\u00b0C<\/li>\n
  • Low ESR 40 kOhm max<\/li>\n
  • 1 \u00b5W max drive level<\/li>\n
  • Parabolic temperature characteristic with turnover at 25\u00b0C<\/li>\n
  • Widely used in watches and timekeeping circuits<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Real-time clock (RTC) modules<\/li>\n
    • Watch and clock circuits<\/li>\n
    • Calendar functions in microcontrollers<\/li>\n
    • Battery-backed time reference<\/li>\n
    • Power metering timekeeping<\/li>\n
    • Automotive body electronics<\/li>\n
    • Industrial timing systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The DT-26 32.768KHZ from KDS (Daishinku Corporation) is a 32.768 kHz tuning fork quartz crystal in a cylindrical 2x6mm through-hole package. This is one of the most widely used timekeeping crystals in the electronics industry, providing the standard 32.768 kHz reference frequency for real-time clock (RTC) circuits in watches, clocks, and embedded systems. […]<\/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":[65],"tags":[1543,1542],"chip_brand":[1541],"class_list":["post-10293","post","type-post","status-publish","format-standard","hentry","category-crystals-oscillators","tag-32-768khz","tag-dt-26","chip_brand-kds"],"acf":{"brief_explanation":"KDS DT-26 32.768kHz tuning fork quartz crystal, 2x6mm cylinder, 12.5pF, \u00b120ppm, ESR 40k\u03a9 max, -40 to +85\u00b0C","date_code":"","package_case":"DT-26 Cylindrical Through-Hole (2.0 x 6.0 mm)","in_stock":3824,"datasheet":"https:\/\/www.kds.info\/product\/category\/quartz-crystal\/","price":"","product_introduction":"The DT-26 32.768KHZ from KDS (Daishinku Corporation) is a 32.768 kHz tuning fork quartz crystal in the industry-standard DT-26 cylindrical 2x6mm through-hole package. The 32.768 kHz frequency is the universal timekeeping reference (2^15 = 32768), allowing simple binary division to generate 1 Hz for real-time clock circuits. KDS is one of the world's largest manufacturers of 32.768 kHz crystals, with the DT-26 being one of their most widely produced products used in watches, RTC modules, and embedded systems worldwide. The \u00b120 ppm frequency tolerance at 25\u00b0C translates to approximately \u00b11.7 seconds per day worst-case, while the typical performance is significantly better at around \u00b10.5 seconds per day.","working_principle":"The DT-26 32.768KHZ operates as a tuning fork quartz crystal using the X-Y flexural vibration mode of a bar-shaped quartz element. Unlike AT-cut crystals that use thickness shear mode for MHz frequencies, tuning fork crystals use a cantilever flexural mode where two tines vibrate in opposite directions, producing the 32.768 kHz frequency. The NT-cut orientation produces a parabolic frequency-temperature curve described by \u0394f = TC \u00d7 (TA - TTP)\u00b2 ppm, where TC is approximately -0.04 ppm\/\u00b0C\u00b2 and TTP (turnover temperature) is 25\u00b0C. The very low drive level of 1 \u00b5W maximum is critical because excessive drive power can fracture the thin tuning fork tines. The high ESR of 40 kOhm is characteristic of tuning fork crystals and requires careful oscillator circuit design with adequate gain margin (> 3x typical).","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Crystal Terminal 1<\/td>Passive<\/td>One terminal of the tuning fork resonator; connects to oscillator input<\/td><\/tr>
      2<\/td>Crystal Terminal 2<\/td>Passive<\/td>Other terminal of the tuning fork resonator; connects to oscillator output<\/td><\/tr><\/table>","application_scenarios":"
      • Real-Time Clock:<\/strong> Provides 32.768 kHz reference for RTC ICs like DS3231, MCP7940N, and PCF8563 with 12.5pF load capacitance matching most RTC designs.<\/li>
      • Watch Circuits:<\/strong> Time reference for analog and digital watches including Casio, Seiko, and other major brands.<\/li>
      • MCU RTC:<\/strong> Drives on-chip RTC oscillator of microcontrollers for calendar and alarm functions in battery-backed modes.<\/li>
      • Power Metering:<\/strong> Time reference for electricity, gas, and water meters requiring long-term time accuracy.<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Frequency<\/th>Notes<\/th><\/tr>
        Epson<\/td>MC-306 32.768K-E<\/td>8x3.8mm<\/td>32.768 kHz<\/td>SMD alternative<\/td><\/tr>
        Seiko<\/td>SP-T2A-F32.768kHz<\/td>2x6mm<\/td>32.768 kHz<\/td>Pin-compatible cylinder<\/td><\/tr>
        NDK<\/td>NX2012SA 32.768kHz<\/td>2.0x1.2mm<\/td>32.768 kHz<\/td>Compact 2012 SMD<\/td><\/tr>
        Murata<\/td>XRCGB32K768K16R8-G<\/td>2.0x1.2mm<\/td>32.768 kHz<\/td>Compact SMD alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/10293","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=10293"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/10293\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=10293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=10293"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=10293"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=10293"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}