Crystals in QRT-38
General application
Computer clocks, Video and Audio equipments
Features
The 38C is a cylinder-shaped compact most suitable for high-density mounting.
*The 38CHT is a heat-resistant crystal unit.
Most suitable for pagers and card products like PCMCIA application
Typical specifications
| Type | QRT-38 |
|---|---|
| Nominal frequency | 32.000 – 100.000 kHz |
| Frequency tolerance | ± 50 ppm, ± 100 ppm |
| Temperature coefficient | -0.04 ppm/°C max2 |
| Series resistance | see table 2 |
| Motional capacitance | 3.0 fF max. |
| Shunt capacitance | 1.5 pF max. |
| Insulation resistance | 500 MΩ min. |
| Aging | ± 5 ppm/year max. |
| Load capacitance | > 6 pF |
| Operating temperature range | -10 … +60 °C |
| Storage temperature range | -20 … +70 °C |
| Recommended drive level | 0.1 µW |
| Maximum drive level | 1.0 µW max. |
Differences from standard values and other parameters can be consulted.
Examples of standard frequencies and load capacity
(table 1)
| Type | Frequency | CL |
|---|---|---|
| QRT-38 | 26.6667 kHz | 10.0 pF, 11.0 pF |
| 32.5600 kHz | 7.0 pF | |
| 36.8640 kHz | 13.5 pF | |
| 38.4000 kHz | 10.0 pF | |
| 44.7340 kHz | 10.0 pF | |
| 48.0000 kHz | 15.0 pF | |
| 75.0000 kHz | 6.5 pF, 9.0 pF, 20.0 pF | |
| 77.5030 kHz | 10.0 pF, 20.0 pF | |
| 76.8000 kHz | 6.0 pF, 10.0 pF, 11.0 pF | |
| 96.0000 kHz | 6.0 pF, 8.4 pF, 11.0 pF |
Equivalent series resistance (ESRmax)
(table 2)
| Frequency [kHz] | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 33 | 40 | 60 | 70 | 100 | ||||||||
| ESRmax | 55 kΩ | 30 kΩ | 25 kΩ | 22 kΩ | ||||||||
The courses of frequency changes depending on
 |
 |
Pouzdra QRT-38
Vnější rozměry [mm]
