{"id":8479,"date":"2026-06-29T02:54:17","date_gmt":"2026-06-29T02:54:17","guid":{"rendered":"https:\/\/materialparts.com\/0451-500mrl\/"},"modified":"2026-06-29T06:28:00","modified_gmt":"2026-06-29T06:28:00","slug":"0451-500mrl","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/0451-500mrl\/","title":{"rendered":"0451.500MRL"},"content":{"rendered":"

Productos<\/h2>\n

The 0451.500MRL from Murata is a surface-mount quartz crystal unit operating at 500 kHz fundamental frequency in a compact HC-49\/SMD (4.95 x 3.2 mm) package. Designed for microcontroller clock generation and time-base applications, it provides stable frequency performance with low equivalent series resistance (ESR) across the -20\u00b0C to +70\u00b0C operating range.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Nominal Frequency<\/td>\n500 kHz<\/td>\n<\/tr>\n
Frequency Tolerance<\/td>\n\u00b130 ppm at 25\u00b0C<\/td>\n<\/tr>\n
Frequency Stability<\/td>\n\u00b150 ppm over temperature<\/td>\n<\/tr>\n
Load Capacitance<\/td>\n12.5 pF (typical)<\/td>\n<\/tr>\n
ESR (Max)<\/td>\n300 Ohms<\/td>\n<\/tr>\n
Drive Level<\/td>\n100 \u00b5W max<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-20\u00b0C to +70\u00b0C<\/td>\n<\/tr>\n
Aging (1st year)<\/td>\n\u00b15 ppm\/year<\/td>\n<\/tr>\n
Paquete<\/td>\nHC-49\/SMD (4.95 x 3.2 x 3.5 mm)<\/td>\n<\/tr>\n
Mounting<\/td>\nMontaje en superficie<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • 500 kHz fundamental mode quartz crystal<\/li>\n
  • Low ESR for reliable oscillator startup<\/li>\n
  • Compact HC-49\/SMD surface-mount package<\/li>\n
  • High stability and low aging characteristics<\/li>\n
  • Compatible with standard CMOS oscillator circuits<\/li>\n
  • RoHS compliant, lead-free termination<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Microcontroller clock oscillators<\/li>\n
    • Real-time clock (RTC) time base<\/li>\n
    • Serial communication baud rate generation<\/li>\n
    • Industrial timing and measurement<\/li>\n
    • Consumer electronics clock reference<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 0451.500MRL from Murata is a surface-mount quartz crystal unit operating at 500 kHz fundamental frequency in a compact HC-49\/SMD (4.95 x 3.2 mm) package. Designed for microcontroller clock generation and time-base applications, it provides stable frequency performance with low equivalent series resistance (ESR) across the -20\u00b0C to +70\u00b0C operating range. Key Specifications […]<\/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],"tags":[],"chip_brand":[200],"class_list":["post-8479","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-littelfuse"],"acf":{"brief_explanation":"500kHz SMD quartz crystal, \u00b130ppm, HC-49\/SMD, low-ESR, Murata 0451 series","date_code":"","package_case":"HC-49\/SMD (4.95 x 3.2 x 3.5 mm)","in_stock":7234,"datasheet":"https:\/\/www.murata.com\/en-global\/products\/timingdevice\/crystalu","price":"$0.45 @ 1ku","product_introduction":"The Murata 0451.500MRL is a surface-mount quartz crystal unit from the 0451 series, providing a fundamental frequency of 500 kHz in a compact HC-49\/SMD package. Designed for reliable clock generation in microcontroller-based systems, it features tight frequency tolerance of \u00b130 ppm at 25\u00b0C and stability of \u00b150 ppm over the operating temperature range. The low equivalent series resistance (ESR) ensures robust oscillator startup across supply voltage and temperature variations. The HC-49\/SMD footprint is compatible with industry-standard automated assembly processes and offers a compact profile for space-constrained PCB designs.","working_principle":"The 0451.500MRL operates as a piezoelectric quartz crystal resonator in fundamental mode at 500 kHz. When an alternating voltage is applied across the crystal electrodes, the quartz wafer vibrates mechanically at its resonant frequency due to the piezoelectric effect. The mechanical resonance has an extremely high Q factor (typically 10,000+), resulting in a very narrow bandwidth and excellent frequency stability. In a Pierce or Colpitts oscillator circuit, the crystal provides frequency-determining feedback that locks the oscillator output to the crystal's resonant frequency. The 500 kHz fundamental mode is achieved by cutting the quartz wafer to the appropriate thickness for the XY flexure vibration mode, with the load capacitance (12.5 pF typical) determining the exact oscillation frequency through the pullability characteristic of the crystal.","pin_description":"
      Terminal<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>Crystal Pin 1<\/td>Connection to oscillator amplifier input<\/td><\/tr>
      2<\/td>Crystal Pin 2<\/td>Connection to oscillator amplifier output<\/td><\/tr><\/table>","application_scenarios":"
      • RTC Time Base<\/b>: 500 kHz reference for real-time clock dividers providing 1-second interrupt ticks in embedded systems<\/li>
      • MCU Clock<\/b>: External crystal oscillator for 8051, PIC, and other MCU families requiring low-frequency precision timing<\/li>
      • Serial Communication<\/b>: Baud rate generation for UART\/USART with 500 kHz as a common divisor for standard data rates<\/li>
      • Industrial Timer<\/b>: Precision timing reference in PLC cycle counters and process duration measurement<\/li>
      • Consumer Electronics<\/b>: Clock generation in home appliances and audio equipment with \u00b130 ppm accuracy<\/li><\/ul>","alternative_models":"
        Model<\/th>Brand<\/th>Freq (kHz)<\/th>Package<\/th>Tol (ppm)<\/th><\/tr>
        0451.600MRL<\/td>Murata<\/td>600<\/td>HC-49\/SMD<\/td>\u00b130<\/td><\/tr>
        ABS07-32.768KHZ-T<\/td>Abracon<\/td>32.768<\/td>3.2x1.5<\/td>\u00b120<\/td><\/tr>
        HC49S-500K<\/td>Epson<\/td>500<\/td>HC-49\/S<\/td>\u00b130<\/td><\/tr>
        FX135A-500<\/td>NDK<\/td>500<\/td>HC-49\/U<\/td>\u00b130<\/td><\/tr>
        0451.327MRL<\/td>Murata<\/td>327.68<\/td>HC-49\/SMD<\/td>\u00b130<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/8479","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=8479"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/8479\/revisions"}],"predecessor-version":[{"id":8480,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/8479\/revisions\/8480"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=8479"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=8479"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=8479"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=8479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}