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RKM - 18 ( 20.0 - 255.0 MHz )

Specifications

Miniature Fundamental Mode Crystal Units



Surface mount package TSS-2   Scale 4:1
PARAMETERS VALUES
Frequency range, MHz 20.0 ~ 255.0
Calibration tolerance at 25 °C, D f/fn, ppm ± 20 ~ ± 100
Temperature stability, D f/fn, ppm ± 10 ~ ± 20
Operating temperature range, ° C -10 to +60 °C
Circuit condition: series resonance or load capacitance, CL, pF 8 ~ 30
Equivalent series resistance, R1 see table
Shunt capacitance, Ñ0, pF 1 ~ 2.5
Capacitance coefficient for fundamental mode r = Ñ0/Ñ1, (max) see table
Quality factor, Q see table
Aging, first year, D f/fn, ppm (max) ± 10 ~ ± 30
Drive level, mW, (max) 0,1
Features ESR, Capacitance coefficient and Quality factor
Fundamental mode
Inverted mesa crystal
Miniature package
Wide frequency range

These fundamental mode crystal units are based on inverted mesa blanks having unique surface finish quality provided by an original ion-thinning technology. The crystal units are featured by high Q- factor and remarkably low resistance values. Frequency pulling range of ±0.1% at very low power consumption levels and good unwanted resonance suppression is easily achieved in VCXO.
FREQ MHz
AT-cut		 R (max), Îì r (max) Q (min)
õ 103
20.00 ~ 50.00
Fundamental		 15 350 30
50.00 ~ 100.00
Fundamental		 15 400 20
100.00 ~ 150.00
Fundamental		 15 500 15
150.00 ~ 220.00
Fundamental		 20 600 12
220.00 ~255.00
Fundamental		 25 900 10

Ordering information
NOTE: Some combinations of stability and temperature range may not be available. Please check with us before ordering.