Datasheet

EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: [phone] Fax: [phone] email: [e-mail] web: www.euroquartz.co.uk
THROUGH-HOLE CRYSTALS
Frequency Range: 3.2MHz to 70MHz
Oscillation Mode
AT-cut Fundamental: 3.2MHz to 30.0MHz
BT-cut Fundamental: 24.0MHz to 48.0MHz
AT-cut Third Overtone: 27.0MHz to 70.0MHz
Calibration Tolerance at 25ºC
AT-cut: ±30ppm (Tolerance to ±10ppm
is also available)
BT-cut: ±30ppm
Frequency stability over temperature
AT-cut: ±30ppm over -10° to +60°C
(Tolerance ±10ppm over -10° to
+60°C is also available)
BT-cut: ±100ppm over-10° to +60°C
Load Capacitance: 8pF to 32pF or Series (Specify)
Ageing: ±3ppm max 1st year,
±1ppm max per year after
Drive level: 500µW max
Static capacitance (C0): 7pF maximum
• Very low cost crystal
• Available with 3.5mm (standard) or 2.5mm height
• AT-cut strip crystal with hermetically sealed metal can
• Comprehensive Euroquartz stockholding
• Ideal crystal for height-limited PCBs
HC49/4H CRYSTALS
FEATURES
GENERAL SPECIFICATION
DESCRIPTION
HC49/4H crystals share the same base dimensions as the industry-
standard HC49 crystal but with a low profile can. The crystal utilizes an
AT-cut strip crystal with a hermetically sealed metal can. HC49/4H
crystals provide a low-cost solution for many applications, particularly
where PCB height is restricted.
OUTLINES & DIMENSIONS
Frequency
(MHz)
Crystal Cut/
Oscillation Mode
ESR (max)
(Ohms)
OSCILLATION MODE & ESR
3.2 ~ 3.4 AT Fund. 300
3.5 ~ 4.0 AT Fund. 150
4.1 ~ 4.9 AT Fund. 120
5.0 ~ 5.9 AT Fund. 100
6.0 ~ 8.9 AT Fund. 80
9.0 ~ 9.9 AT Fund. 60
10.0 ~ 12.9 AT Fund. 50
13.0 ~ 30.0 AT Fund. 40
24.0 ~ 40.0 BT Fund. 40
40.1 ~ 48.0 BT Fund. 30
30.1 ~ 50.0 AT 3rd. 100
50.1 ~ 70.0 AT 3rd. 80
PART NUMBER GENERATION
HC49/4H crystal part numbers are derived as follows:
Example: 24.000MHz HC49/4H/30/50/10/30pF/ATF
Frequency Holder/Calibration/Temp. Stability/ Temp. Range/Circuit
TEMPERATURE STABILITY
Sample curves for AT-cut and BT-cut strip crystals