SM156

Low Cost Inverted Mesa Crystals Blanks Inverted Mesa Crystals Blanks 50 - 700 MHz for 5 x7 mm SMD & UM-1/HC45 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). RM126 SM156 Device Dimensions mm This series offers an much lower pricing than CM220 series. mm Tolerances X 1.829 +0.000 XECO's proprietary process yields a mesa which is clean and free of defects, enabling high performance operation for -0.025 Z 3.200 +0.000 -0.025 oscillators and filters. 1.524 +0.025 -0.025 MX Benefits: Features 1.524 +0.025 -0.025 MZ ma 0.533 Lower cost implementation than with round +0.001 -0.001 blanks XECO high quality low spurs crystals mb 0.762 +0.003 -0.003 Low spurs for filter (with small electrodes and Aluminum Electrodes plated to opposite corners mc +0.001 -0.001 plating) Electrodes in various sizes possible for frequencies and Fit wide range of mounts md C1/C0 ratios +0.001 -0.001 High yield potential Tune Low and Tune High options 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 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 Inches mils (0.001") X 72.00 Z 126.00 MX 60.00 60.00 MZ ma 21.00 mb 30.00 mc md m: tx 6.00 t: 33.00 m: NA arcS NA Tolerances +0.00 -1.00 +0.00 -1.00 +1.00 -1.00 +1.00 -1.00 +0.05 -0.05 +0.10 -0.10 +0.05 -0.05 +0.05 -0.05 +0.08 -0.08 +0.5 -0.5 +0.5 -0.5 NA NA For more information, sales and technical support: The Roditi International Corporation Ltd London, England Phone +44 20 7439 4390 Fax +44 20 7434 0896 Email: sales@roditi.com RM126 Low Cost Inverted Mesa Crystals Blanks 50 - 700 MHz for 5 x7 mm SMD & UM-1/HC45 SM156 Inverted Mesa Crystals Blanks 30 - 250MHz 0.220 round clip mount designs Device Dimensions Device Dimensions mm X Z X MX Z MZ MX ma MZ mb ma mc mb md mc m: md tx m: t: tx m: t: arcS m: arcS mm mm Tolerances 1.829 +0.000 -0.025 mm Tolerances 3.200 +0.000 -0.025 3.962 +0.000 -0.025 1.524 +0.025 -0.025 3.962 +0.000 -0.025 1.524 +0.025 -0.025 2.540 +0.025 -0.025 0.533 +0.001 -0.001 2.540 +0.025 -0.025 0.762 +0.003 -0.003 0.744 +0.001 -0.001 +0.001 -0.001 1.052 +0.003 -0.003 +0.001 -0.001 0.372 +0.001 -0.001 +0.002 -0.002 0.372 +0.001 -0.001 0.152 +0.013 -0.013 1.780 +0.002 -0.002 0.838 +0.013 -0.013 0.711 +0.013 -0.013 NA NA 0.711 +0.013 -0.013 NA NA NA NA NA NA Inches mils (0.001") Inches Tolerances X (0.001") 72.00 +Tolerances 0.00 -1.00 mils Z 126.00 +0.00 -1.00 X 156.00 +0.00 -1.00 MX 60.00 +1.00 -1.00 Z 156.00 +0.00 -1.00 60.00 +1.00 -1.00 MZ MX 100.00 +1.00 -1.00 ma 21.00 +0.05 -0.05 +1.00 -1.00 MZ 100.00 mb 30.00 +0.10 -0.10 ma 29.29 +0.05 -0.05 mc +0.05 -0.05 mb 41.42 +0.10 -0.10 md +0.05 -0.05 mc 14.65 +0.05 -0.05 m: +0.08 -0.08 md 14.65 +0.05 -0.05 tx 6.00 +0.5 -0.08 m: 70.07 +0.08 -0.5 t: 33.00 +0.5 -0.5 tx 28.00 +0.5 -0.5 m: NA NA t: 28.00 +0.5 -0.5 arcS NA NA m: NA NA arcS NA NA For more information, sales and technical support: The Roditi International Corporation Ltd London, England Phone +44 20 7439 4390 Fax +44 20 7434 0896 Email: sales@roditi.com