About crystal devices sockets

About crystal devices

Semiconductors are called as “Rice for industries.” Crystal devices are called “Salt for industries.”
Although salt is not a main ingredient, it plays important role for complete flavor of foods. For instance, MCU (Microcontroller Unit) is used for various appliances such as rice cookers, TV’s, air conditioners, but it does not operate by itself. MCU requires timing clock generated by crystal devices. Most cutting edge MCU also requires a crystal device for operation. This is the reason why crystal devices are called as “Salt for industries.” Crystal devices are a unique electronic component utilizing a natural mineral.

  • Precise Standard Timing Signals
  • Stable Frequencies
Smartphones, mobile devices, watches and clocks, digital home appliances, automotive applications

Principle of Crystal Device Operation

Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress.
French physicists Jacques and Pierre Curie discovered piezoelectricity in 1880. Crystal oscillators and resonators utilizes this effect.

Types of Crystal Devices


Resonators Tuning-Fork Crystal Resonators
AT-Cut Crystal Resonators
Oscillators SPXO (Simple Packaged Crystal Oscillators)
VCXO (Voltage Controlled Crystal Oscillators)
TCXO (Temperature Compensated Crystal Oscillator)
OCXO (Oven Controlled Crystal Oscillators)
Filters Crystal Filters
SAW filters (Surface Acoustic Wave Filters)

About Test Sockets

Test sockets are used to connect electronic devices and test equipment to perform electrical inspection of applications such as smartphones, PC’s, appliances, automotive applications.

Crystal Device Sockets

Test sockets for testing crystal devices

  • オープントップ型(CXCシリーズ)

    Open Top Type (CXC Series)

    Open top sockets utilize innovative insertion method that are best fit for automated mass-production equipment and manual testing.

  • クラムシェル型(CXPシリーズ)

    Clam Shell Type (CXP Series)

    Clam shell type sockets consist of plastic molding and Spring Probes. This design is proper for hand insertion test such as qualification tests.

  • バタフライ型(CXXシリーズ)

    Butterfly Type (CXX Series)

    Butterfly type sockets are specifically designed for automated mass-production test systems.

Correlation between crystal device applications and test sockets

Test items and how they are tested vary with different types of devices.

High Precision Applications

General Applications

Crystal Device Applications Test Requirements Socket Required?
OCXO OCXO Base stations
Precision test equipment
Aging (a week) Yes
TCXO TCXO Automotive
Base stations
Temperature compensation
(6hours of ROM programming)
VCXO VCXO Industrial equipment Voltage/temperature test
(A few minutes)
Yes (for qualification)
SPXO SPXO Automotive
Industrial equipment
Commercial applications
Operating temperature test
(A few minutes)
(Depending on applications)

Strengths of MiS Technologies