Crystals in HC-51/U and HC-48/U cases

Typical application
Telecommunications, radiocommunications

Features
Cases HC-51 and HC-48 series are highly reliable,
hermetic sealing by resistence-weld sealing

Assembly, taping
Cases HC-51 and HC-48 series are through hole types

Typical specifications

Type	HC-51/U, HC-48/U
Overtone	1.
Frequency range	1 - 5 MHz
Freq. adjustment tolerance at 25 °C	±5, ±7, ±10, ±15, ±20, ±50 x 10-6
Frequency stability	see table 1
Equivalent series resistance	see table 2
Aging	±1, ±2, ±3 ppm/year
Storage temperature range	-40 ... +90 °C
Load capacitance	series resonance, CL= 5 ... 50 pF
Drive level	10 - 1000 µW

Differences from standard values and other parameters can be consulted.


Frequency stability in temperature ranges (table 1)

Temperature range [°C]

Frequency stability [ppm]

± 2

± 3

± 4

± 5

± 7

± 10

± 15

± 20

± 25

± 30

± 40

± 50

+15 ... +35

+10 ... +40

+5 ... +45

0 ... +50

-5 ... +55

-10 ... +60

-15 ... +65

-20 ... +70

-25 ... +75

-30 ... +80

-40 ... +90

-55 ... +105

Equivalent series resistance (ESR_max) (table 2)

Overtone	Frequency [MHz]
	1.0		1.5		2.0		3.0		4.0		5.0
1.		800 Ω		500 Ω		300 Ω		150 Ω		80 Ω