石英晶振----音叉石英晶體諧振器
特点:
小尺寸表面封装类型最适合高密度线路板
嵌人具有热抵抗的柱状晶体带来高的稳定特性
适合于小型移动通讯装备
规格标准
Frequency Range       頻率範圍	32.768KHz			Load Capacitance       負載電容	12.5pf	Need to specify		Absolute Maximum Drive Level 最大激勵電平	1.0μW Max			Frequency Tolerance      調整頻差	±20ppm	at 25 Need to specify		Series Resistance       諧振電阻	65K? Max			Turnover Temperature     拐點溫度	25±5			Temperature Coefficient  二次溫度係數	2
[-0.035±0.01]ppm/			Operating Temperature Range 工作溫度範圍	–40~+85	at 25℃		Storage Temperature Range 保存溫度範圍	–55~+125			Shunt Capacitance      靜態電容	0.8pF Typical			Aging[first year]      第一年老化率	±3ppm Max	25 ±3℃		Insulation Resistance      絕緣阻抗	500Mohm Min.			
Do not connect #2 and #3 to extermal device and GND.
The part of the cylinder inside resin mold may besometimes exposed,however,it does not affect the characteristics of crystal unit.
Please make sure that there is no pattern under EC-140on the circuitboard.
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石英晶振.doc