Crystals in HC-49/U and HC-50/U cases

Features
Cases HC 49-50 series are highly reliable,
hermetically sealed by seam welding.

Assembly, taping
Cases HC 49-50 series are designed for through hole mount, but it can by designed for SMD too.

Crystals in SMD modification can by delivered in tapes wound on reels, suitable for automatic assembly.

Typical specifications

Type	HC-49/U, HC-50/U
Overtone	1.	3.	5.	7.	9.
Frequency range	1.6-40MHz	16-120MHz	30-190MHz	90-190MHz	120-190MHz
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)
for first overtone

Overtone	Frequency [MHz]
	1.6		2.0		2.4		3.0		4.5		6		8		15		22
1.		500 Ω		300 Ω		250 Ω		120 Ω		80 Ω		30 Ω		20 Ω		15 Ω

for higher overtones

Overtone	Frequency [MHz]
	16		30		90		120		160		190
3.		40 Ω		35 Ω
5.				50 Ω				65 Ω
7.						100 Ω				120 Ω
9.								130 Ω