Commercialization of Quartz Crystal Unit “Hybrid Crystal Resonator” Jointly Developed with Tokyo Denpa Co., Ltd.

Commercialization of Quartz Crystal Unit “Hybrid Crystal Resonator” Jointly Developed with Tokyo Denpa Co., Ltd.


Murata Manufacturing Co., Ltd.

President/ Statutory Representative Director: Tsuneo Murata


Murata Manufacturing Co., Ltd. has commercialized and commenced mass production of “Hybrid Crystal Resonator,” quartz crystal unit, jointly developed with Tokyo Denpa Co., Ltd. (hereinafter “Tokyo Denpa”) .


In 1977, Murata developed “CERALOCK®,” now widely used in various equipment for the purpose of resonating CPU clock signals*1.

Resonator devices*2 include ceramic resonators and quartz crystal units. Ceramic resonators are small and inexpensive, while quartz crystal units are expensive and high-precision. In most cases, consumer products tend to incorporate ceramic resonators.

However, as SATA*3 and USB accelerated the transfer speed for the PC interface, resonators used for HDDs began to require higher precision.

We have combined Tokyo Denpa’s high quality quartz crystal element technology and our excellent production technology to jointly develop quartz crystal units “Hybrid Crystal Resonators” as a timing device responding to the market demands.

In addition to our ceramic resonator’s stronghold in automotive and consumer applications, we can now aim at expanding our share in the HDD market where relatively high precision is required.


  • Tokyo Denpa provides quartz crystal elements, and Murata handles production and sales of quartz crystal units, “Hybrid Crystal Resonator”.


  • More inexpensive compared with quartz crystal units
    Based on Murata’s excellent production technology, achieving small size and high performance.
  • Higher-precision compared with ceramic resonators
    High precision was achieved due to high grade quartz crystal elements provided by Tokyo Denpa. While the initial frequency precision for ceramic resonators ranges between a few hundred to a few thousand ppm, that of a Hybrid Crystal Resonator is approximately 100 ppm.
  • Complies to RoHS directive, being lead-free (phase 3)
  • Accommodates lead-free solder mounting


*1 Clock signal Signal source that regulates operations of various LSIs
*2 Resonator device One of the timing devices. Ceramic resonators utilize ceramic piezoelectric properties, while quartz crystal units utilize quartz piezoelectric properties.
*3 SATA One of the extended specifications for IDE (ATA) standards used in the connection between computers and storage devices such as HDDs

Part Number

XRCGA series


Used for storage devices such as HDDs and ODDs. USB2.0 High Speed specification compliant

Electric characteristic

Nominal frequency 24 to 48 MHz
Initial frequency deviation ±100 ppm
Temperature characteristics ±50 ppm
Operational temperature range -30 to 85゚C

Characteristics Diagram

Temperature characteristics of XRCGA30M000*

External Size


in April 2009

Sample Price

20 Yen/per unit


2 patents pending

Murata in Brief

Murata Manufacturing Co., Ltd. is a worldwide leader in the design, manufacture and sale of ceramic-based passive electronic components & solutions, communication modules and power supply modules. Murata is committed to the development of advanced electronic materials and leading edge, multi-functional, high-density modules. The company has employees and manufacturing facilities throughout the world. For more information, visit Murata's website at