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RKM - 12 ( 40.0 - 255.0 MHz )

Specifications

Miniature Fundamental Mode Crystal Units



Metal-glass package UM-1 Scale 2:1
PARAMETERS VALUES
Frequency range, MHz 40.0 ~ 255.0
Calibration tolerance at 25 °C, D f/fn, ppm ± 10 ~ ± 50
Temperature stability, D f/fn, ppm ± 10 ~ ± 25
Operating temperature range, ° C -10 to +60 °C ~
-40 to +85 °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) ± 5 ~ ±20
Drive level, mW, (max) 100
Features ESR, Capacitance coefficient and Quality factor
Fundamental mode
Inverted mesa crystal
Miniature package
Wide frequency range
Center ground lead available

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
40.00 ~100.00
Fundamental		 15 400 30
100.00 ~ 150.00
Fundamental		 15 500 20
150.00 ~ 220.00
Fundamental		 15 600 12
220.00 ~255.00
Fundamental		 20 900 10

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