EURO QUARTZ CX7SM CRYSTAL Ultra-Miniature SMD Crystal 14MHz to 250MHz 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 OUTLINE & DIMENSIONS 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. SPECIFICATION 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 Standard Calibration Tolerance : Load Capacitance: Drive Level: Frequency Stability2 -10° to +70°C: -40° to +85°C: -55° to +125°C: Ageing First Year: Shock, Survival4: Vibration, Survival: Operating Temperature Range: 1 Storage Temperature Range: Maximum Process Temperature: 1. 2. 3. Dim. H Glass Lid Ceramic Lid SM1 SM2 SM3 1.14 1.17 1.22 1.27 1.30 1.35 CRYSTAL EQUIVALENT CIRCUIT ±100ppm to ±1000ppm 10pF (or as specified) 200µW maximum ±50ppm to ±10ppm ±100ppm to ±35ppm ±100ppm to ±50ppm ±5ppm maximum 5000g peak, 0.3ms, ½ sine 20g rms, 10~2000Hz random -10°C to +70°C (Commercial) -40°C to +85°C (Industrial) -55°C to +125°C (Military) -55° to +125°C +260°C for 20 seconds Other tolerances available, as low as ±5ppm. Does not include calibration tolerance. (Frequency stability characteristics follow that of the AT-Cut thickness-shear mode.) Higher shock version available. R1 Motional Resistance C1 Motional Capacitance L1 Motional Inductance 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). TERMINATIONS - PLATING Designation Termination SM1 SM2 SM3 Gold Plated Nickel, Solder Plated Nickel, Solder Plated and Solder Dipped HOW TO ORDER CX7SM AT CRYSTALS CX7 - S 'S' if special, custom design. Otherwise leave blank - C Blank = glass lid C = ceramic lid - SM1 - Terminations SM1 = Gold plated SM2 = Solder plated SM3 = Solder dipped 49.0M, Frequency M = MHz 50 / Calibration Tolerance @25°C (in ppm)* 50 / - / Frequency Stability over Temp. Range (in ppm)* I Temp. Range C = -10° ~ +70°C I = -40° ~ +85°C M = -55° ~ +125°C S = Customer specified *Alternative 'total' tolerance (in ppm) EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk