EURO
QUARTZ
FEATURES
Radiation tolerance up to 100kRad total dose
High shock and vibration resistance
Ultra-high reliability
Custom designs available
Military and space screening available
Low ageing
Critical processes performed in Class 10 cleanroom
SWCX1 SWEPT QUARTZ CRYSTALS
8MHz to 250MHz
Page 1 of 2
Radiation-Resistant Miniature Crystals
DESCRIPTION
SWCX1 swept quartz crystals are designed for applications requiring
resistance to ionizing radiation. SWCX1 crystals are produced from
cultured quartz that is electrically 'swept' at high temperature to
remove interstital impurities within the crystalline structure. This
process produces crystal resonators that are superior to those utilizing
non-swept quartz on that they maintain their frequency and other
electrical characteristics under exposure to radiation levels of
100kRad (1kGy) and greater.
Further, as such applications requiring radiation resistance typically
also require various degrees of of high-reliability components, we
offer these resonators in three distinct screening options to meet
mission critial programme requirements from engineering to flight.
ELECTRICAL SPECIFICATION
Specifications are typical unless otherwise noted.
Package Style:
Frequency Range:
Motional Resistance (R1) @ 25°C
at 32MHz:
at 155.2MHz:
Motional Capacitance (C1) @ 25°C
at 32MHz:
at 155.2MHz:
Shunt Capacitance (C0) @25°C:
Quality Factor (Q) @ 25°C:
Load Capacitance (CL)
<50MHz:
>50MHz:
Drive Level
<50MHz:
>50MHz:
SWCX1 (SM)
SWCX1 (03)
8.0MHz to 250.0MHz
25Ω
15Ω
6.2fF
1.0fF
2.3pF
30k
20pF
10pF
500µW maximum
200µW maximum
APPLICATIONS
·
·
·
·
·
Military and aerospace
Satellite
Space exploration systems
Deep space probes
Telemetry
PACKAGING OPTIONS
SWCX1 crystals are avaialble in SMD or leaded formats.
Supplied: Tray packed (option for SM crystals)
16mm tape on 178mm or 330mm reels (only for SM crystals)
Per EIA 481 (see tape and reel data sheet 10109)
GENERAL SPECIFICATION
Specifications are typical unless otherwise noted.
Calibration Tolerance @ 25°C:
Temperature Stability:
Ageing First Year:
Shock Survival*:
Vibration Survival:
±100ppm
or tighter, as required
Refer to CX1 AT datasheet
±2ppm maximum.
3,000g peak 0.3ms, ½ sine
20g, 10~2,000Hz
swept sine
PACKAGE DIMENSIONS
Dim.
A
B
C (max.)
D
E
F
SWCX1
Surface-mount
(mm)
8.00
3.56
1.78
1.14
1.52
-
SWCX1
Leaded (03)
(mm)
8.00
3.56
1.78
7.87
1.02
3.81
TERMINATIONS - PLATING
Designation
Termination
OUTLINES
SM1
SM2
SM3 / 03
Gold Plated
Solder Plated
Solder Dipped
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk
EURO
QUARTZ
SWCX1 SWEPT QUARTZ CRYSTALS
8MHz to 250MHz
Page 2 of 2
Radiation-Resistant Miniature Crystals
STANDARD TESTS AND SCREENING OPTIONS
Code
S
X
X
X
X
X
X
X
X
X
X
M
X
X
E
X
Made with swept quartz
Internal visual (pre-seal)
PIND testing
Radiographic inspection
Unwanted modes
Low temperature storage
Frequency and resistance over
operating temperature range
Company internal standard
MIL-STD-883 Method 2020 Cond. A
MIL-STD-202 Method 209
MIL-PRF-3098
MIL-PRF-3098
MIL-PRF-3098
Spurious mode ratio 2:1 or greater
Resistance must meet specification at this
low temperature.
Measure every 2.5 degree C or tighter
over operating temperature range;
frequency and resistance must meet
specification.
Frequency and resistance must meet
specification after ageing; maximum
allowed change in series frequency 5ppm
Performed in both width and thickness
directions
Item
Method
Comments
X
X
X
Accelerated ageing
105 degree C for a minimum of 160 hours
X
X
X
X
X
X
X
X
X
Seal test (fine leak)
Seal test (gross leak)
External visual (post seal)
MIL-STD-883 Method 1014 Cond. A1
MIL-STD-883 Method 1014 Cond. C
Company internal standard
Notes:
S: for space-based applications.
M: for military appl.ications (MIL-PRF-3098)
E: For engineering prototypes and applications not
requiring additional screening.
HOW TO ORDER SWCX1 SWEPT CRYSTALS
SWCX1 - S
Swept
Quartz
Crystal
-
S
- C
-
SM1 - 20.0M , 100
Leaded
03
Surface Mount
SM1
SM2
SM3
Frequency
M = MHz
Calibration
Tolerance
@25°C
(in ppm)*
/ 100 / –
Frequency
Stability over
temperature
(in ppm)*
/
I
Screening per
option code:
S = Space
M = Military
E = Engineering
'S' for
'C' =
special or Ceramic
custom
Lid
design
Temp. Range
C = -10° ~ +70°C
I = -40° ~ +85°C
M = -55° ~ +125°C
S = Customer specified
Or:
-
/
-
/ 200 /
Total
frequency
tolerance
(ppm)
I
Temp. Range
C = -10° ~ +70°C
I = -40° ~ +85°C
M = -55° ~ +125°C
S = Customer specified
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk
