{"id":10256,"date":"2026-07-09T09:05:07","date_gmt":"2026-07-09T09:05:07","guid":{"rendered":"https:\/\/ic-vendor.com\/q-0-032768-smq32sl-12-5-30-t1-lf\/"},"modified":"2026-07-09T09:05:07","modified_gmt":"2026-07-09T09:05:07","slug":"q-0-032768-smq32sl-12-5-30-t1-lf","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/q-0-032768-smq32sl-12-5-30-t1-lf\/","title":{"rendered":"Q 0.032768-SMQ32SL-12.5-30-T1-LF"},"content":{"rendered":"

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

The Q 0.032768-SMQ32SL-12.5-30-T1-LF is a Jauch Quartz product designed for electronic applications. It features compact design with reliable performance characteristics suitable for various industrial and consumer applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7c7b\u578b<\/td>\nSMD Tuning Fork Quartz Crystal<\/td>\n<\/tr>\n
Series<\/td>\nSMQ32SL<\/td>\n<\/tr>\n
Frequency<\/td>\n32.768 kHz<\/td>\n<\/tr>\n
Frequency Tolerance at 25C<\/td>\n+\/- 30 ppm<\/td>\n<\/tr>\n
Frequency Stability vs Temperature<\/td>\n+\/- 80 ppm (-40C to +85C, T1)<\/td>\n<\/tr>\n
Load Capacitance CL<\/td>\n12.5 pF standard<\/td>\n<\/tr>\n
Temperature Constant (TC)<\/td>\n-0.04 ppm\/C2 max \/ -0.034 ppm\/C2 typ<\/td>\n<\/tr>\n
ESR (Series Resistance)<\/td>\n50 kOhm max (35 kOhm on request)<\/td>\n<\/tr>\n
Shunt Capacitance C0<\/td>\n1.3 pF typical<\/td>\n<\/tr>\n
Drive Level Max<\/td>\n1 uW<\/td>\n<\/tr>\n
Aging (1st year)<\/td>\n< +\/- 3 ppm<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C to +85C (T1)<\/td>\n<\/tr>\n
\u5b58\u50a8\u6e29\u5ea6<\/td>\n-40C to +90C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n8.0 x 3.8 x 2.4 mm, 4-Pad SMD<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTape and Reel<\/td>\n<\/tr>\n
RoHS<\/td>\nCompliant (LF suffix)<\/td>\n<\/tr>\n
\u90e8\u4ef6\u72b6\u6001<\/td>\nEOL (stock unless sold)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n

32.768 kHz tuning fork quartz crystal; SMQ32SL 8.0×3.8mm SMD package; 12.5pF standard load capacitance; \u00b130ppm frequency tolerance at 25C; \u00b180ppm frequency stability over -40C to +85C; Parabolic temperature characteristic with turning point at 25C; ESR 50kOhm max; Drive level 1uW max; Aging less than \u00b13ppm first year; 4-pad SMD footprint; RoHS compliant lead-free (LF); EOL – stock unless sold<\/p>\n

\u5e94\u7528<\/h2>\n

Real-time clock (RTC) modules; Watch and timekeeping circuits; Calendar functions in microcontrollers; Battery-backed time reference; Power metering timekeeping; Industrial timing and scheduling; Automotive body electronics; Consumer appliance timers<\/p>","protected":false},"excerpt":{"rendered":"

Product Overview The Q 0.032768-SMQ32SL-12.5-30-T1-LF is a Jauch Quartz product designed for electronic applications. It features compact design with reliable performance characteristics suitable for various industrial and consumer applications. Key Specifications Type SMD Tuning Fork Quartz Crystal Series SMQ32SL Frequency 32.768 kHz Frequency Tolerance at 25C +\/- 30 ppm Frequency Stability vs Temperature +\/- 80 […]<\/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":[65,60],"tags":[1502],"chip_brand":[1500],"class_list":["post-10256","post","type-post","status-publish","format-standard","hentry","category-crystals-oscillators","category-passive-components","tag-q-0-032768-smq32sl-12-5-30-t1-lf","chip_brand-jauch-2"],"acf":{"brief_explanation":"32.768 kHz tuning fork quartz crystal, 12.5pF, \u00b130ppm tolerance, \u00b180ppm stability, -40 to +85C, 8x3.8mm SMD","date_code":"","package_case":"8.0 x 3.8 x 2.4 mm (4-Pad SMD)","in_stock":2207,"datasheet":"https:\/\/www.jauch.com\/downloadfile\/smq32sl\/smq32sl.pdf","price":"$2.50 @ 1ku","product_introduction":"The Q 0.032768-SMQ32SL-12.5-30-T1-LF from Jauch Quartz is a 32.768 kHz tuning fork quartz crystal in the SMQ32SL 8.0 x 3.8mm surface-mount package, optimized for real-time clock (RTC) and timekeeping applications. The 32.768 kHz frequency is the industry-standard reference for timekeeping, as 2^15 = 32768, allowing simple binary division to generate 1 Hz for real-time clock circuits. The tuning fork crystal design uses an X-Y flexural mode bar resonator that provides a parabolic frequency-temperature characteristic with a turnover point at approximately 25C, described by the equation delta_f = TC x (TA - TTP)^2, where TC = -0.04 ppm\/C2 max. This results in maximum frequency deviation of \u00b180ppm over the -40C to +85C range, which translates to approximately \u00b17 seconds per day worst-case. The 12.5pF load capacitance is the most common standard for RTC ICs, and the \u00b130ppm tolerance at 25C ensures accurate initial timekeeping. Note: The SMQ32SL series is listed as EOL (End of Life); for new designs, consider the Jauch JTX410 or JTX310 as replacements.","working_principle":"The Q 0.032768-SMQ32SL-12.5-30-T1-LF 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 (like a tuning fork), producing the 32.768 kHz frequency. The NT-cut or XY-cut orientation produces a parabolic frequency-temperature curve described by delta_f = TC x (TA - TTP)^2 ppm, where TC is approximately -0.04 ppm\/C2 and TTP (turnover temperature) is 25C. At the turnover point, the frequency-temperature slope is zero, providing maximum stability near room temperature. The maximum deviation occurs at the temperature extremes: at -40C, the deviation is approximately -0.04 x (-40 - 25)^2 = -169 ppm, while the specification guarantees \u00b180ppm over the -40C to +85C range by selecting blanks with tighter TC values. The very low drive level of 1uW maximum (compared to 100uW for AT-cut crystals) is critical because excessive drive power can fracture the thin tuning fork tines. The high ESR of 50kOhm is characteristic of tuning fork crystals and requires careful oscillator circuit design with adequate gain margin.","pin_description":"
Pad<\/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 amplifier input<\/td><\/tr>
2<\/td>Ground \/ Case<\/td>Ground<\/td>Connected to metal case; should be connected to PCB ground plane<\/td><\/tr>
3<\/td>Ground \/ Case<\/td>Ground<\/td>Connected to metal case; should be connected to PCB ground plane<\/td><\/tr>
4<\/td>Crystal Terminal 2<\/td>Passive<\/td>Other terminal of the tuning fork resonator; connects to oscillator amplifier output<\/td><\/tr><\/table>","application_scenarios":"
  • Real-Time Clock (RTC):<\/strong> Provides the 32.768 kHz reference for dedicated RTC ICs like the DS3231 or MCP7940N, with 12.5pF load capacitance matching most RTC oscillator designs.<\/li>
  • MCU Internal RTC:<\/strong> Drives the on-chip RTC oscillator of microcontrollers with 32.768 kHz input 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 with the \u00b180ppm stability ensuring billing precision.<\/li>
  • Industrial Scheduling:<\/strong> Time base for PLCs and industrial controllers implementing scheduled operations and data logging timestamps.<\/li><\/ul>","alternative_models":"
    Manufacturer<\/th>Part Number<\/th>Package<\/th>Frequency<\/th>Notes<\/th><\/tr>
    Jauch<\/td>JTX410 32.768kHz<\/td>4.1x1.5mm<\/td>32.768 kHz<\/td>Smaller modern replacement<\/td><\/tr>
    Jauch<\/td>JTX310 32.768kHz<\/td>3.2x1.5mm<\/td>32.768 kHz<\/td>Compact replacement, active<\/td><\/tr>
    Epson<\/td>MC-306 32.768K-E<\/td>8x3.8mm<\/td>32.768 kHz<\/td>Pin-compatible direct replacement<\/td><\/tr>
    Seiko<\/td>SP-T2A-F32.768kHz<\/td>8x3.8mm<\/td>32.768 kHz<\/td>Industry-compatible form factor<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10256","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=10256"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10256\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10256"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}