May 8th, 2019
Nihon Dempa Kogyo Co., Ltd.
Representative Director and President
Hiromi Katoh
Development of high-reliability crystal oscillator for space electronics
Nihon Dempa Kogyo Co., Ltd. has developed a highly reliable crystal oscillator (XO) thatwithstands severe vibrations and shocks during launch and is highly resistant to radiation in spaceenvironment as space-use electronics mounted on satellites and rockets, and has begun taking orders.
Since we obtained NASDA (*1) certification for quartz crystal units for space development in 1978,
we have contributed to the development of the space industry as the only certified manufacturer ofquartz crystal units in Japan. In the expansion of the space business from development to utilization of
the recent years with anticipated increasing number of new entrants,domestically-manufactured crystal
oscillators had been expected by the conventional use. In order to meet their needs, we have developed
this high-reliability crystal oscillators for aerospace applications using our accumulated know-how inthe design and manufacture of high-quality, high-reliability quartz crystal units and circuit design
technologies for highly reliable products for industrial applications.
The reliability of this product has been improved by adopting a double hermetic seal structure of thepackage, and high-reliability parts (*2) are used to ensure the reliability requirement for spaceelectronics. We carry out thorough process control and 100% inspection for electrical characteristics inmanufacturing, and conduct Quality Conformance Inspection (QCI) (JAXA standard (*1,3)) for quality
inspections. As a result, this crystal oscillator has become JAXA-qualified part by conforming toJAXA-QTS-2020 (Integrated Circuits, Hybrid, High Reliability, Space Use,General Specification for).
We will continue to contribute to the development of the space business with high-reliability
products, with a view to expand into overseas markets.
(*1)

NASDA is an abbreviation for the National Space Development Agency of Japan, and is now Japan
Aerospace Exploration Agency(JAXA) as a result of the merger of the three institutions in 2003.

(*2)

JAXA qualified parts, MIL-qualified parts or equivalent screened parts(*3)

Compliance with MIL-STD-883 (Test Method Standard for Microcircuits, approved for use by all
Departments and Agencies of the Department of Defense)[Appearance of the product][Sales starts from]
Orders began in April 2019.
[Specifications/ characteristics]
Specification Number

JAXA-QTS-2020/3001

Part Number

JAXA2020/3001-3CBCR*******(*4)

External dimensions

15.8 x 15.8 x 3.5mm(*4)*** Output frequency

Recommended operating conditions
Supply Voltage Range (VCC)+3.3 V +/- 5 %Storage Temperature Range (TSTG,

Tc = -45 deg C to +150 deg C

Non-operating Temperature Range)
Operating Temperature Range

Tc = -45 deg C to +125 deg C(TOPR)
Output Current+/- 4 mA or less

Load Capacitance (CL)

15 pF or lessElectrical Characteristics
Nominal Frequency (fo)41MHz to 100MHz

Current Consumption (Icc)

Max. 40 mA

Output waveform

AC-MOS Logic Level

Frequency-Temperature Stability

Max. +/- 50 x 10-6

Frequency-Voltage Tolerance

Max. +/- 1.0 x 10-6/+3.3 +/- 5%

Long-term Frequency Stability

Max. +/- 3.0 x 10-6/year (Year 1)
Max. +/- 1.5 x 10-6/year (from the second yearonward)

Environmental Performance
Vibration Resistance

MIL-STD-883 process 2007 condition A

Shock Resistance

MIL-STD-883 process 2002 condition B

Temperature Cycling

MIL-STD-883 process 1010 condition C

Thermal ShockMIL-STD-883 process 1011 condition B

Radiation-Resistant (Total Dose)MIL-STD-883 Methods 1019 1,000 Gy (100 krads)

For more information on the product, please contact:[Contact Info]
e-Mail : ndkpr-m@ndk.com