SM156 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – Inverted Mesa Crystals Blanks 30 - 250MHz 0.220 round clip mount designs

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The SM156 series of electrode plated Square inverted Mesa blanks are designed to mount in standard 0.220" mounts (two or
four point mounts).
Device Dimensions
This series offers an much lower pricing than CM220 series.
mm
mm
Tolerances
XECO's proprietary process yields a mesa which is clean and free of defects, enabling high perfXorman1c.8e2o9perat+io0n.00fo0r -0.025
oscillators and filters.
Z 3.200 +0.000 -0.025
Features
Benefits:
MX 1.524 +0.025 -0.025
MZ 1.524 +0.025 -0.025
XECO high quality low spurs crystals
Lower cost implementation tmhan wi0t.h53ro3und +b0la.0n0k1s -0.001
Electrodes plated to opposite corners
Low spurs for filter (with smmabll elec0t.7ro6d2es an+d0.A00l3um-0in.0u0m3
Electrodes in various sizes possible for frequencies and
plating)
mc
+0.001 -0.001
C1/C0 ratios
Fit wide range of mounts md
+0.001 -0.001
Tune Low and Tune High options
High yield potential
m:
+0.002 -0.002
High Q, chemically etched, free of etch channels
tx 0.152 +0.013 -0.013
t: 0.838 +0.013 -0.013
m: NA
NA
arcS NA
NA
Applications
Standard 0.220 round mount applications
High performance VCXO, XO, OCXO, filters, and specials
requiring hybrid design
Telecom, communications, networking, military
Operation Mode
Fundamental or Overtone
Frequency Range
30 to 250 MHz
Frequency Range 3Rd: 90 to 750 MHz
Frequency Tolerance +/- 0.010 F^2 (489KHz at 156.25)
Material and Q
Low Etch Channel Pure Z Quartz with a
Q minimum of 1.8 Million
Surface Finish
Polished
Angle
Std AT cut 35D8' to 35D29' [EFG 3D6' t
Angle Tolerance
+/- 2' or +/- 1'
Dimensions (mm)
3.962 x 3.962 x 0.080 mm
Dimensions (inches) 0.156 x 0.156" (0.220 across diagonal) x
Electrode Size
Contact Sales
Electrode Style
Plated to opposite corners and opposing sides
Electrode Material Chrome Gold or Aluminum
Electrode Freq. Tol.:
Contact Material:
Same as Electrode or Chrome-Gold with Aluminum
Ship Pack Method Vacuum sealed wafflepack
Specification Note
Custom or special requirements are available
Inches
mils (0.001")
Tolerances
X 72.00 +0.00 -1.00
Z 126.00 +0.00 -1.00
MX 60.00 +1.00 -1.00
MZ 60.00 +1.00 -1.00
ma 21.00 +0.05 -0.05
mb 30.00 +0.10 -0.10
mc
+0.05 -0.05
md
+0.05 -0.05
m:
+0.08 -0.08
tx 6.00
+0.5 -0.5
t: 33.00
+0.5 -0.5
m: NA
NA
arcS NA
NA
For more information, sales and technical support:
The Roditi International Corporation Ltd
London, England
Phone [phone]
Fax [phone]
Email: [e-mail]