![](http://datasheet.mmic.net.cn/100000/CX7-SM1-49-0M-100-100---I_datasheet_3069790/CX7-SM1-49-0M-100-100---I_1.png)
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
DESCRIPTION
CX7SM crystals are leadless devices designed for surface mounting.
The ultra-miniature crystals are hermetically sealed in a rugged,
ceramic package. The crystals have a very low profile and small area.
OUTLINE & DIMENSIONS
FEATURES
Designed for infrared, vapour phase or epoxy mounting
Low profile, (<1.2mm) hermetically sealed ceramic package
Excellent ageing characteristics
High shock and vibration resistance
Full military testing available
Available with glass or ceramic lid
Custom designs available
CX7SM CRYSTAL
Ultra-Miniature SMD Crystal
14MHz to 250MHz
SM1
1.14
1.27
SM2
1.17
1.30
SM3
1.22
1.35
Glass
Lid
Ceramic
Lid
Dim. H
HOW TO ORDER CX7SM AT CRYSTALS
CX7 -
S
-
C
-
SM1
-
49.0M,
50
/
50
/ - /
I
'S' if special,
custom design.
Otherwise leave
blank
Blank = glass lid
C = ceramic lid
Terminations
SM1 = Gold plated
SM2 = Solder plated
SM3 = Solder dipped
Frequency
M = MHz
Calibration
Tolerance
@25°C
(in ppm)*
Temp. Range
C = -10° ~ +70°C
I = -40° ~ +85°C
M = -55° ~ +125°C
S = Customer specified
Frequency
Stability over
Temp. Range
(in ppm)*
*Alternative 'total' tolerance (in ppm)
CRYSTAL EQUIVALENT CIRCUIT
R1 Motional Resistance
L1 Motional Inductance
C1 Motional Capacitance
C0 Shunt Capacitance
PACKAGING OPTIONS
CX7SM crystals are available either tray packed (<250pcs) or tape
and reel (>250 pieces).
16mm tape, 178mm or 330mm reels (EIA 418).
Specifications stated are typical at 25°C unless otherwise indicated.
Specifications may change without notice.
49.0MHz
Motional Resistance R1:
14kΩ
Motional Capacitance C1:
2.4fF
Quality Factor Q:
100,000
Shunt Capacitance:
0.8pF
SPECIFICATION
1.
Other tolerances available, as low as ±5ppm.
2.
Does not include calibration tolerance. (Frequency stability
characteristics follow that of the AT-Cut thickness-shear mode.)
3.
Higher shock version available.
Standard Calibration Tolerance1:
±100ppm to ±1000ppm
Load Capacitance:
10pF (or as specified)
Drive Level:
200W maximum
Frequency Stability2
-10° to +70°C:
±50ppm to ±10ppm
-40° to +85°C:
±100ppm to ±35ppm
-55° to +125°C:
±100ppm to ±50ppm
Ageing First Year:
±5ppm maximum
Shock, Survival4:
5000g peak, 0.3ms, sine
Vibration, Survival:
20g rms, 10~2000Hz random
Operating Temperature Range:
-10°C to +70°C (Commercial)
-40°C to +85°C (Industrial)
-55°C to +125°C (Military)
Storage Temperature Range:
-55° to +125°C
Maximum Process Temperature:
+260°C for 20 seconds
TERMINATIONS - PLATING
SM1
Gold Plated
SM2
Nickel, Solder Plated
SM3
Nickel, Solder Plated and Solder Dipped
Designation
Termination