SM156
Inverted Mesa Crystals Blanks
30 - 250MHz 0.220 round clip mount designs
The SM156 series of electrode plated Square inverted Mesa blanks are designed to mount in standard 0.220" mounts (two or
four point mounts).
This series offers an much lower pricing than CM220 series.
XECO's proprietary process yields a mesa which is clean and free of defects, enabling high performance operation for
oscillators and filters.
Features
XECO high quality low spurs crystals
Electrodes plated to opposite corners
Electrodes in various sizes possible for frequencies and
C1/C0 ratios
Tune Low and Tune High options
High Q, chemically etched, free of etch channels
Benefits:
Lower cost implementation than with round blanks
Low spurs for filter (with small electrodes and Aluminum
plating)
Fit wide range of mounts
High yield potential
Applications
Standard 0.220 round mount applications
High performance VCXO, XO, OCXO, filters, and specials
requiring hybrid design
Telecom, communications, networking, military
Operation Mode
Frequency Range
Frequency Range 3Rd:
Frequency Tolerance
Material and Q
Surface Finish
Angle
Angle Tolerance
Dimensions (mm)
Dimensions (inches)
Electrode Size
Electrode Style
Electrode Material
Electrode Freq. Tol.:
Contact Material:
Ship Pack Method
Specification Note
Fundamental or Overtone
30 to 250 MHz
90 to 750 MHz
+/- 0.010 F^2 (489KHz at 156.25)
Low Etch Channel Pure Z Quartz with a
Q minimum of 1.8 Million
Polished
Std AT cut 35D8' to 35D29' [EFG 3D6' t
+/- 2' or +/- 1'
3.962 x 3.962 x 0.080 mm
0.156 x 0.156" (0.220 across diagonal) x
Contact Sales
Plated to opposite corners and opposing sides
Chrome Gold or Aluminum
Same as Electrode or Chrome-Gold with Aluminum
Vacuum sealed wafflepack
Custom or special requirements are available
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