EURO QUARTZ
CX-2 CRYSTAL
Low Profile Miniature Crystal
9.6MHz to 160MHz
FEATURES
Low profile, hermetically sealed ceramic package
Excellent ageing characteristics
High shock resistance
Full military testing available
Available with glass or ceramic lid
Custom designs available
OUTLINE & DIMENSIONS
DESCRIPTION
CX-2 AT crystals are designed in a rugged, ceramic package. Due to
its robust design this crystal has gained wide acceptance in the
industry.
SPECIFICATION
Specifications stated are typical at 25°C unless otherwise indicated.
Specifications may change without notice.
Fundamental Frequency:
Motional Resistance R (Ω):
Motional Capacitance C1 (fF):
10.0MHz
60
2.8
32.0MHz
20
7.8
155.52MHz
50
0.5
95
1.4
36
2.4
41
3.2
QualityFactor Q (k):
Shunt Capacitance C0 (pF):
Calibration Tolerance1:
Load Capacitance:
Drive Level:
Temperature Stability2
Commercial -10 ~ +60°C:
Industrial -40 to +85°C:
Military -55 to +125°C:
Ageing, first year:
Shock, survival3:
Vibration, survival:
Operating Temperature Range
Commercial:
Industrial:
Military:
Storage Temperature Range:
Maximum Process Temperature:
A = ±0.01% (±100ppm)
B = ±0.1%
C = ±1%
20pF (Unless specified by
customer)
500µW maximum
from ±10ppm
from ±20ppm
from ±30ppm
5ppm maximum
3,000g, 0.2ms, ½ sine
20g, 10~2000Hz random
-10° to +70°C
-40° to +85°C
-55 to +125°C
-55° to +125°C
See package handling notes
PACKAGE HANDLING
Note: The characteristics of the frequency temperature stability follow
that of AT-Cut Thickness Shear mode.
1.
Tighter tolerances available.
2.
Does not include calibration tolerance.
3.
Higher shock version available
The CX crystal is hermetically sealed in a ceramic package. Normal
handling and soldering precautions for small, low thermal mass parts
are adequate when installing or testing CX crystals. CX crystals may
be wave soldered with proper precaution taken to avoid desoldering
the leads. A slow machine rate or too high a pre-heat temperature or
solder bath temperature may damage the crystals. Lead to package
solder interface temperature should not exceed 175°C, glass lid
to package seal rim temperature should not exceed 210°C. If
the seal rim reaches temperatures above the maximum specified, the
package may lose its hermeticity. Loss of hermeticity results in a
frequency decrease and motional resistance increase.
HOW TO ORDER CX-2 LEADED CRYSTALS
CX-2 - S
-
'S' if special,
custom design.
Otherwise leave
blank
OT
OT = 3rd
Overtone
Mode.
Blank =
Fundamental
Mode
-
C
-
Blank = glass lid
C = ceramic lid
03 - 32MHz,
Side Leads
Frequency
K = kHz
M = MHz
A
/ 25 /
Calibration Frequency
Stability
Tolerance
over temp.
@25°C
(in ppm)
A
B
C
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
