Product Details:
Payment & Shipping Terms:
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| Other Name: | Crystal Oscillator | Nominal Frequency: | 20MHz |
|---|---|---|---|
| Holder Type: | HC-49U/S | Frequency Stability(25℃): | ±20ppm |
| Frequency Stability Vs. Temp.: | ±30ppm | Load Capacitance: | 20pF±0.2pF |
| Highlight: | electret condenser microphone,pir motion sensor |
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20MHz Quartz Crystal Unit in low‐profile package HC‐49U/S SMD
Electrical characteristics:
| Item | Specification | |
| 1 | Nominal frequency | 20MHz |
| 2 | Holder type | HC-49U/S |
| 3 | Oscillator mode | AT |
| 4 | Frequency stability(25℃) | ±20ppm |
| 5 | Operating temperature range | -20℃~+80℃ |
| 6 | Frequency stability vs.temp. | ±30ppm |
| 7 | Load capacitance | 20pF±0.2pF |
| 8 | Equivalent series resistance | 40Ω max. |
| 9 | Shunt capacitance | 7.0pF max. |
| 10 | Drive level | 50μW in standard |
| 11 | Insulation resistance | 500MΩ at DC100V |
| 12 | Aging rate a year | ±3ppm |
| 13 | Test impedance meter | S&A250B |
| 14 | Marking | 3.579545 |
| 15 | Storage temperature range | -55℃~+125℃ |
| 16 | Storage humidity range | 0~95%RH |
Physical and Environment Characteristics:
| Item | Condition of test | Performance requirements |
| Mechanical Shock | Resonator shall be measured after 3 times random dropping from the height of 60cm onto hard wooden broad of thickness more than 30mm | No visible damage, and measured Values shall meet Table 1 |
| Vibration | Subject resonator to following vibration: Frequency::10～55Hz Amplitude:1.5mm Duration:3 mutually perpendicular planes in each 2 hours Direction:X Y and Z axis |
No visible damage, and measured Values shall meet Table 1 |
|
Terminal Strength Terminal Pulling Terminal Bending |
Force of 5N is applied to each lead in axial direction for 30±5 sec. When force of 5N is applied to each lead in axial direction, the lead shall folded up 90o from the axial direction and folded back to the axial direction. The speed of folding shall be each 3 seconds. |
No visible damage, and measured Values shall meet Table 1 |
| Solder ability | Lead terminals are immersed up to 2mm from Resonator’s body in soldering bath of 235±5℃ for 2±0.5 sec. | More than 95％ of the terminal surface of the resonator shall be covered with fresh solder |
| Resistance to Soldering Heat | Lead terminals are immersed up to 2mm from Resonator’s body in soldering bath of 260±10℃ for 10±0.5 seconds and then resonator shall be measured after being placed in natural conditions for 2 hours. | No visible damage, and measured Values shall meet Table 1 |
| Temperature Cycling | Subject the resonator to -20℃ for 30 min, followed by a high temperature of +80℃ for 30 min. Cycling shall be repeated 5 times. resonator shall be measured after being placed in natural conditions for 2 hours. |
No visible damage, and measured Values shall meet Table 1 |
| Heat Resistance | Subject the resonator to +85℃±5℃ for 96 hours, resonator shall be measured after being placed in natural conditions for 2 hours. | No visible damage, and measured Values shall meet Table 1 |
| Cold Resistance | Subject the resonator to -40℃±5℃ for 96 hours, resonator shall be measured after being placed in natural conditions for 2 hours. | No visible damage, and measured Values shall meet Table 1 |
| Humidity | Subject the resonator at +40℃±5℃ and 90％～95％ R.H. for 96 hours, resonator shall be measured after being placed in natural conditions for 2 hours. |
No visible damage, and measured Values shall meet Table 1 |
Dimension:(mm)
Contact Person: Mr. Roy Zhang
Tel: 86 574 55878090
Fax: 86-574-55878097
