May 25th, 2021
Nihon Dempa Kogyo Co., Ltd.
Representative Director and President
Hiromi Katoh
Developed the industry-leading(*1) Low g-Sensitivity (*2) crystal unit
Nihon Dempa Kogyo Co., Ltd. has developed a low-acceleration sensitivity (Low g-Sensitivity)
crystal unit that is robust to external vibrations, and has started sample shipments.
Despite its compact size of 3.2×2.5×0.72mm, the vibration resistance against external
vibration are approximately 10 times higher than that of conventional crystal unit.
In recent years, in base stations for 5G communication systems, there has been a growing demandfor DU/RU (*3) and other devices to be smaller in accordance with the diversification of installation
environments. When such a small device is installed in various environments, the impact of theinternal crystal resonator due to vibration caused by wind, rain, cooling fan has become a problem. Inaddition, progress in information and communication technologies such as 4K/8K videocommunications, automotive communications equipment, and IoT is remarkable. To support
these high-reliability communications, a high-stability, high-quality crystal unit with a minimal
environmental degradation is required.
To meet these needs, we have developed a new crystal unit with superior vibration resistance using
photolithography technology and stress analysis simulation.
This product achieves the industry's highest level of acceleration sensitivity Typ. 0.1ppb/g,
which is a very low sensitivity, and achieves approximately 10 times better performancecompared to conventional crystal unit of the same size. By using this product, we hope to contributeto the improvement of high-stability, high-quality equipment performance in a wide range ofenvironments in which customers operate.
This product is planned for further frequency expansion, miniaturization, and a lineup that accommodates
automotive standard (AEC-Q200). We will continue to contribute to the realization of a safe, secure, andcomfortable society through the crystal device business.
[Product appearance][Sample timing]
Start of sample shipment in April 2021
[Specifications/Characteristics]
Model
Dimensions (mm)NX3225SP
3.2×2.5×0.72

ELECTRICAL CHARACTERISTICS
Nominal Frequency (MHz)Overtone Order
Frequency Tolerance (+25±3℃)
Frequency Temperature Characteristics (-40～+85℃)

20～52
Fundamental±20 × 10-6
±20 × 10-6

Operating Temperature Range (℃)
Storage Temperature Range (℃)
Equivalent Series Resistance (Ω)
Level of Drive (μW)
Load Capacity (pF)
Acceleration Sensitivity (ppb/g)-40～+85-55～+125
Max. 50
1008Max. 0.2 (Typ. 0.1)

Other・Surface mount compatible product. (Compatible with reflow soldering)・It is a lead-free product, and it also supports the reflow profile of lead-free soldering.
[Comparison with the conventional product (*4)](*1) : Based on our investigation in April 2021.
(*2) : Low acceleration/sensitivity (Low g-Sensitivity)
Refers to low acceleration sensitivity, which is expressed in terms of the change infrequency per gravitational acceleration 1G.
The smaller the value, the less the impact due to vibration.
(*3) : DU (Distributed Unit (5G base station/digital unit))
RU (Radio Unit (5G base station/radio satellite station))(*4) : Common crystal unit
[Contact]
NIHON DEMPA KOGYO CO., LTD.
e-mail ：newsrelease@ndk.com