{"id":10605,"date":"2026-07-20T06:38:59","date_gmt":"2026-07-20T06:38:59","guid":{"rendered":"https:\/\/ic-vendor.com\/tsetkljatf-20mhz\/"},"modified":"2026-07-20T06:38:59","modified_gmt":"2026-07-20T06:38:59","slug":"tsetkljatf-20mhz","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/tsetkljatf-20mhz\/","title":{"rendered":"TSETKLJATF-20MHZ"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The TSETKLJATF-20MHZ from Taitien is a 20 MHz TCXO (Temperature Compensated Crystal Oscillator) with CMOS output, operating from 3.3V supply. It features ultra-high frequency stability of \u00b14.6ppm over -40\u00b0C to +85\u00b0C, making it ideal for precision timing applications such as GPS, synchronous Ethernet, and IEEE 1588.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7c7b\u578b<\/td>\nTCXO (Temperature Compensated Crystal Oscillator)<\/td>\n<\/tr>\n
Frequency<\/td>\n20 MHz<\/td>\n<\/tr>\n
\u8f93\u51fa<\/td>\nCMOS<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n3.3V (2.8V to 3.47V range)<\/td>\n<\/tr>\n
Frequency Stability<\/td>\n\u00b14.6ppm over -40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
Frequency Tolerance<\/td>\n\u00b11.5ppm at 25\u00b0C<\/td>\n<\/tr>\n
Frequency Aging<\/td>\n\u00b11ppm\/year (maximum)<\/td>\n<\/tr>\n
Max Supply Current<\/td>\n7.5 mA (typical)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n10-SMD (7.0 x 5.0 x 2.0 mm)<\/td>\n<\/tr>\n
Load Capacitance<\/td>\n15 pF<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Ultra-high stability: \u00b14.6ppm over -40\u00b0C to +85\u00b0C<\/li>\n
  • 20 MHz CMOS output for precision timing<\/li>\n
  • Low aging rate: \u00b11ppm per year maximum<\/li>\n
  • Frequency tolerance: \u00b11.5ppm at 25\u00b0C<\/li>\n
  • 3.3V supply voltage operation<\/li>\n
  • Enable\/Disable function for power management<\/li>\n
  • 10-SMD package: 7.0 x 5.0 x 2.0mm<\/li>\n
  • RoHS compliant<\/li>\n
  • Suitable for IEEE 1588 and GPS applications<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • GPS\/GNSS receiver timing references<\/li>\n
    • IEEE 1588 Precision Time Protocol<\/li>\n
    • Synchronous Ethernet (SyncE)<\/li>\n
    • Microwave communication systems<\/li>\n
    • Industrial precision timing<\/li>\n
    • Telecom base station synchronization<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TSETKLJATF-20MHZ from Taitien is a 20 MHz TCXO (Temperature Compensated Crystal Oscillator) with CMOS output, operating from 3.3V supply. It features ultra-high frequency stability of \u00b14.6ppm over -40\u00b0C to +85\u00b0C, making it ideal for precision timing applications such as GPS, synchronous Ethernet, and IEEE 1588. Key Specifications Type TCXO (Temperature Compensated Crystal […]<\/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":[13,38],"tags":[1946],"chip_brand":[1943],"class_list":["post-10605","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-static-random-access-memory-sram","tag-tsetkljatf-20mhz","chip_brand-taitien"],"acf":{"brief_explanation":"20MHz TCXO, CMOS, 3.3V, \u00b14.6ppm stability, \u00b11ppm\/year aging, 10-SMD 7x5mm","date_code":"","package_case":"10-SMD (7.0 x 5.0 x 2.0 mm)","in_stock":980,"datasheet":"https:\/\/www.taitien.com\/wp-content\/uploads\/2020\/05\/TS-Series.pdf","price":"$4.85 @ 1ku","product_introduction":"The TSETKLJATF-20MHZ from Taitien is a 20 MHz Temperature Compensated Crystal Oscillator (TCXO) providing CMOS output from a 3.3V supply. The device achieves ultra-high frequency stability of \u00b14.6ppm over the full -40\u00b0C to +85\u00b0C industrial temperature range, making it suitable for precision timing applications where standard crystal oscillators (\u00b150-100ppm) are inadequate. The TCXO uses an analog compensation circuit that generates a temperature-dependent correction voltage applied to a varactor diode in the crystal oscillator circuit, pulling the frequency to compensate for the crystal's temperature-frequency characteristic. The K in the part number denotes the \u00b14.6ppm stability grade, L denotes the temperature range (-40\u00b0C to +85\u00b0C), J denotes CMOS output, and A indicates the supply voltage class. The device offers \u00b11ppm\/year maximum aging and \u00b11.5ppm frequency tolerance at 25\u00b0C.","working_principle":"The TSETKLJATF-20MHZ operates through four key subsystems:\n\n1. Crystal Oscillator: An AT-cut quartz crystal provides the 20 MHz frequency reference. The crystal is cut at a specific angle to optimize its temperature-frequency characteristic, but even with optimal cutting, the crystal exhibits a cubic temperature dependence that limits uncompensated stability to \u00b130-50ppm.\n\n2. Temperature Sensing: A thermistor network or integrated temperature sensor measures the ambient temperature with high accuracy. The temperature sensor output is calibrated against the crystal's individual temperature-frequency characteristic during production.\n\n3. Compensation Circuit: An analog compensation circuit generates a correction voltage based on the measured temperature. This voltage is applied to a varactor diode (voltage-controlled capacitor) in the crystal oscillator's load capacitance network. The varactor capacitance change pulls the oscillator frequency to compensate for the crystal's temperature-induced frequency deviation. The compensation polynomial (typically 3rd order) is programmed during calibration.\n\n4. CMOS Output: The compensated oscillator signal is buffered through a CMOS output driver providing rail-to-rail swing at 3.3V. The output driver is isolated from the oscillator to prevent load-pulling effects that could degrade frequency stability.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VC<\/td>Input<\/td>Voltage control input for fine frequency tuning (optional)<\/td><\/tr>
      2<\/td>NC<\/td>-<\/td>Not connected<\/td><\/tr>
      3<\/td>NC<\/td>-<\/td>Not connected<\/td><\/tr>
      4<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      5<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      6<\/td>NC<\/td>-<\/td>Not connected<\/td><\/tr>
      7<\/td>OUTPUT<\/td>Output<\/td>CMOS clock output (20 MHz)<\/td><\/tr>
      8<\/td>NC<\/td>-<\/td>Not connected<\/td><\/tr>
      9<\/td>VDD<\/td>Power<\/td>Supply voltage (3.3V)<\/td><\/tr>
      10<\/td>NC \/ ENABLE<\/td>Input<\/td>Enable\/Disable (active high)<\/td><\/tr><\/table>","application_scenarios":"
      • GPS\/GNSS: \u00b14.6ppm stability ensures satellite signal acquisition and tracking with minimal Doppler search window; 20 MHz is a common GPS reference frequency for downconversion<\/li>
      • IEEE 1588 PTP: \u00b11ppm\/year aging and \u00b14.6ppm temperature stability enable sub-microsecond time synchronization over extended periods without external calibration<\/li>
      • Synchronous Ethernet: \u00b14.6ppm stability meets ITU-T G.8262 EEC (Ethernet Equipment Clock) requirements for SyncE frequency distribution in telecom networks<\/li>
      • Microwave comm: Low phase noise TCXO reference enables stable up\/down conversion in microwave radio links operating at GHz frequencies<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Taitien<\/td>TSETTLJATF-20.00MHz<\/td>10-SMD 7x5<\/td>Same freq, different stability grade<\/td><\/tr>
        Taitien<\/td>TLEAMLJATF-20.000000<\/td>10-SMD 5x3.2<\/td>VCTCXO, \u00b1100ppb, compact<\/td><\/tr>
        Epson<\/td>TG-5035CE-20.000000M<\/td>SMD<\/td>20MHz TCXO, \u00b12.0ppm<\/td><\/tr>
        Rakon<\/td>PTA20-2.5-3.3-4.0-50<\/td>SMD<\/td>20MHz TCXO, \u00b14.0ppm<\/td><\/tr>
        NXP<\/td>8N3DV85EC-0200EDT<\/td>SMD<\/td>20MHz VCTCXO, \u00b10.5ppm<\/td><\/tr>
        SiTime<\/td>SIT3808AI-33-20.000000T<\/td>SMD<\/td>20MHz TCXO, MEMS, \u00b10.5ppm<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10605","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=10605"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10605\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10605"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10605"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10605"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10605"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}