SM Tuning Fork Crystal Tuning Fork Quartz Crystal The tuning fork crystal provides the circuit designer with the ultimate in size, performance, and economic trade-offs. This highly reliable, stable, and accurate device is available in two micro -miniature sizes for time base applications operating from a 32.768KHz reference frequency. • • • • • WX26B Very small, compact SM packaging Rugged, resistant to shock and vibration Low cost Ideal for time of watches and clocks Complies with Directive 2002/95/EC (RoHS Compliant) Specifications: Frequency Range: WX26B 30.000 ~ 120.000 KHz 32.768 KHz Operating Temperature: Standard 0°C ~ +50°C -A -10°C ~ +60°C -B -20°C ~ +70°C -C -40°C ~ +85°C -L Storage Temperature: -30°C ~ +80°C Frequency Tolerance: ± 50 ppm (at 25°C) ± 30 ppm -30 ± 20 ppm -20 -50 Temperature Coefficient: -0.04 ppm/°C Circuit Condition: 8 pF ~ 32 pF or series 12.5 pF (Standard) -None Turnover Temperature: 25 ± 5 °C Series Resistance: Maximum resistance corresponds All dimensions are in mm Recommended Reflow Temperature Profile Temperature(degC) 300 to frequency. Please see R table. Reflow set temperature peak temperature 250 Drive Level: 1.0 μW max 235degC Less Than 5sec 225±5degC 10±1sec 200degC Preheat set temperature 1~3.5degC/sec Series Capacitance: Cool down speed 200 4.0 fF max Less than 35sec 1~4degC/sec 160degC 150 150±10degC 140degC Reflow high temperature period 70~100sec 100 Parallel Capacitance: 2.0 pF max 1~3degC/sec Reflow temperature rise speed Preheat time 50 Preheat temperature rise speed Aging: ± 3 ppm max per year Optional Features: Tape & Reel -Standard Ordering Information Note: 1. Other frequencies, tolerances, stabilities, and operating temperature ranges available. Consult VTC Support for specific requirements. 2. Not all combinations of the above tolerances, stabilities, and temperature ranges are available. Consult VTC Support if your requirement is not standard. 3. All specifications subject to change without notice. Phone: +86 (10) 5820-3910 © 2006 by Vanlong Technology Co., Ltd. Fax: +86 (10) 5820-3915 Product name + Temperature Range + CL + Frequency Tolerance + Other Specification Code + Frequency. i.e. WX26BC50-32.768KHz Email: [email protected] Web: http://www.vanlong.com W X26B