DAISHINKU CORPORATION : manufacturing and selling crystal devices including crystal oscillator as leading product

2520 size	This indicates the outside dimensions of the product. 2520 size indicates a product sized 2.5 by 2.0 in mm, and 3225 size indicates a product sized 3.2 by 2.5 in mm.
Attenuation Bandwidth	Frequency interval at which relative attenuation is guaranteed to be equal to or less than a given value, A2.
Combined Capacitance	Capacitance of the connection between elements for 4 pole filter.
Guaranteed Attenuation	Relative attenuation guaranteed in a specific range within the stop band.
Insertion Loss	Difference in attenuation when filter is inserted and not inserted. Can be either of the following: Minimum loss: Minimum value of insertion loss Insertion loss at f0: Insertion loss at nominal frequency
Metal-jacket (SMD) type	Crystal filters attached with an additional metal clip to make it available for surface-mounting.
Monolithic Crystal Filters	A device that has a frequency screening function. From a wide frequency range, it passes a specific frequency and attenuates unnecessary ones. It plays the role of extracting desired frequency in radio communications equipment such as cellular and cordless phones. With the high Q factor of the crystal, these filters feature low loss, steep attenuation characteristics and high stability as well as good temperature drifting characteristics.
Nominal Frequency	Nominal value of center frequency.
Operating Temperature Range	Temperature range over which the quartz device can be operated within allowable deviation range.
Pass Bandwidth	Frequency interval at which relative attenuation is guaranteed to be equal to or less than a given value, A1.
Ripple	The maximum difference between the maximum attenuation and the minimum loss within the pass band.
SMD type	Abbreviation of Surface Mounted Device. It is a generic term used to identify packages which can be mounted to the PCBs.
Spurious	Relative attenuation produced as a result of spurious frequencies in a specific range within the stop band.
Storage Temperature Range	Temperature range, which a quartz device should be stored at without any deterioration or damage.
Terminal Impedance	Signal-source impedance or loading impedance as viewed from the filter side. Expressed as parallel capacitance including resistance and floating capacitance.
Tolerance in Group Delay Time	Difference between the maximum value and minimum value of the group delay time within the pass band.

2520 size

This indicates the outside dimensions of the product. 2520 size indicates a product sized 2.5 by 2.0 in mm, and 3225 size indicates a product sized 3.2 by 2.5 in mm.

Attenuation Bandwidth

Frequency interval at which relative attenuation is guaranteed to be equal to or less than a given value, A2.

Combined Capacitance

Capacitance of the connection between elements for 4 pole filter.

Guaranteed Attenuation

Relative attenuation guaranteed in a specific range within the stop band.

Insertion Loss

Difference in attenuation when filter is inserted and not inserted. Can be either of the following:
Minimum loss: Minimum value of insertion loss
Insertion loss at f0: Insertion loss at nominal frequency

Metal-jacket (SMD) type

Crystal filters attached with an additional metal clip to make it available for surface-mounting.

Monolithic Crystal Filters

A device that has a frequency screening function. From a wide frequency range, it passes a specific frequency and attenuates unnecessary ones. It plays the role of extracting desired frequency in radio communications equipment such as cellular and cordless phones. With the high Q factor of the crystal, these filters feature low loss, steep attenuation characteristics and high stability as well as good temperature drifting characteristics.

Nominal Frequency

Nominal value of center frequency.

Operating Temperature Range

Temperature range over which the quartz device can be operated within allowable deviation range.

Pass Bandwidth

Frequency interval at which relative attenuation is guaranteed to be equal to or less than a given value, A1.

Ripple

The maximum difference between the maximum attenuation and the minimum loss within the pass band.

SMD type

Abbreviation of Surface Mounted Device. It is a generic term used to identify packages which can be mounted to the PCBs.

Spurious

Relative attenuation produced as a result of spurious frequencies in a specific range within the stop band.

Storage Temperature Range

Temperature range, which a quartz device should be stored at without any deterioration or damage.

Terminal Impedance

Signal-source impedance or loading impedance as viewed from the filter side. Expressed as parallel capacitance including resistance and floating capacitance.

Tolerance in Group Delay Time

Difference between the maximum value and minimum value of the group delay time within the pass band.