C153-SMD Model Crystal package to meet today's demand for pick and place processing. Available on tape and reel in quantities of 3K for SMT placement. 32.768KHz SMD Package 0.126 ±0.004 (3.2 ±0.1) Internal Connection 0.059 ±0.004 (1.5 ±0.1) RECOMMENDED REFLOW SOLDERING PROFILE Ramp-Up 3°C/Sec Max. Critical Temperature Zone Ramp-Down 6°C/Sec. 260°C Solder Pad Layout 217°C 0.036 (0.9 Max) 0.044 (1.1) 0.056 (1.4) 200°C 0.044 (1.1) 0.095 (2.4) 150°C 0.052 (1.3) Do not design any patterns in this area. 0.075 (1.9) Preheat 180 Secs. Max. 90 Secs. Max. 8 Minutes Max. 0.071 (1.8) 260°C for 10 Secs. Max. 0.024 (0.6) Dimensions inches (mm) All dimensions are maximum unless otherwise specified Electrical: Frequency: Mode: Load Cap: Calibration Tolerance: Stability: Operating Temp. range: Storage Temp. range: Resistance: Shunt Cap: NOTE: Reflow Profile with 240°C peak also acceptable. Crystal Specifications 32.768 KHz Tuning Fork 12.5pF (See Table 1) ±20ppm at 25°C -0.035 ±0.006ppm/±C2 (See Chart 1) -40 to 85°C -55 to 125°C 70K Ω Max 1.05pF Typ. Aging: Drive level: Quality Factor: Spurious Response: C0/C1 Ratio: Pullability: Trim Sensitivity: Temp. Coefficient: Type/Angle of Quartz Cut: Insulation Resistance: ±3ppm Max first year 1uW Max 30K Typ. Not Specified Not Specified Not Specified Not Specified Not Specified Not Specified 500 Megaohms Min at 100Vdc Typical Temperature Characteristic 0 Load Cap Part Number PPM Load Cap Options 12.5pF 9.0pF 7.0pF C153-SMD C153-9-SMD C153-7-SMD -50 Table 1 -10 0 25 Temperature °C Chart 1 CRYSTEK CORPORATION 60 TD-060803 Rev. B 12730 Commonwealth Drive • Fort Myers, Florida 33913 Phone: 239-561-3311 • 800-237-3061 Fax: 239-561-1025 • www.crystek.com