Krystaly, Hradec Králové, a.s.
 
Crystals in QRT-38 image

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
  •  temperature
  • load capacitance


 
 
 

QRT-38 cases

Outline dimensions [mm]

 
 
 

KRYSTALY 

Hradec Králové, a.s. 
Okružní 1144 
500 03 Hradec Králové 3 
Česká republika