 |  | HC-49/US, HC-49/USMD CRYSTAL UNITS |  |
| Features: | Small size, Light weight
High dependability by means of resistance weld hermetic seal.
Tape and reel available
Height 2.5mm available |
| Type | HC-49/US, HC-49/USMD | | Frequency range | Fundamental
| 3.5~90.0MHz | | Vibration mode | AT cut, Fundamental, O3 | | Frequency tolerance(at 25oC) | - /+20PPM~ | | Equivalent series resistance | See table No.1 | | Stability(-10~+60oC) | - /+20PPM~ | | Shunt capacitance | 5.0 max. | | Load capacitance | Series resonance, 16pF, 20pF, 30pF | | Insulation resistance | 500 M ohms //DC 100V | | Shock | Natural drop from 75cm height onto a hard wooden
board, three times dF/F=±5ppm max. | | Vibration | The crystal units shall be capable of with standing each one hour in 3 directions 10-55Hz amplitude 1.5mm Fs=±3.0ppm max.
ESR:- /+2.0 ohms or 15% whichever is larger | | Leak | 5*10^-8 atm.cc/sec max. | | Aging | - / +5ppm / year |
Equivalent series resistance(ESR) Table No. 1 | Frequency | Mode | ESR | | 3.5~3.9MHz | Fundamental | 150 ohms max. | | 4.0~4.9 MHz | Fundamental | 130 ohms max. | | 5.0~5.9 MHz | Fundamental | 120 ohms max. | | 6.0~7.9 MHz | Fundamental | 100 ohms max. | | 8.0~8.9 MHz | Fundamental | 80 ohms max. | | 10.0~14.9 MHz | Fundamental | 60 ohms max. | | 15.0~48.0 MHz | Fundamental | 40 ohms max. | | 36.0~90.0 MHz | O3 | 70 ohms max. |
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