THROUGH-HOLE CRYSTALS
HC49 SERIES CRYSTALS
DESCRIPTION
HC49 crystals are a long-established industry-standard part. Basic
specification HC49 crystals provide the lowest cost crystal available but
these crystals can also be manufactured to very close tolerances and low
ESR values. Holder variants are HC49/T (truncated), providing a lower
height version, 3-wire versions where the crystal base and body can be
earthed by a centre earth wire and HC50 which has larger diameter leads
specifically for socket mounting.
OUTLINES & DIMENSIONS
FEATURES
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Very low cost crystal
Available with close tolerances
Fully customisable specification
Comprehensive Euroquartz stockholding
Industry-standard package with options
Very wide frequency range
GENERAL SPECIFICATION
Frequency Range:
Calibration Tolerance at 25ºC:
Frequency stability over temp:
Load Capacitance:
Ageing:
Drive level:
Static capacitance (C0):
Holder:
Part Numbers for Holder Variants *
Holder Type
Standard 2 lead:
Low height versions:
Centre Earth Lead:
Centre Earth Lead (Low):
‘Plug-in’ for use in socket:
Holder Designation
HC49
HC49/T (from 4.0MHz)
HC49/3W
HC49/T/3W (from 4.0MHz)
HC-50
1.0MHz to 250.0MHz
from ±3ppm to ±50ppm
from ±3ppm to ±100ppm
8pF to 50pF, or Series
±3ppm max 1st year,
±1ppm max per year after
1mW max
7pF max
Resistance-weld, hermetic seal
* HC49 crystals are also available for surface-mount applications with
formed leads and fitted with a clip. See ‘49MJ’ in the surface-mount
crystal section on Euroquartz website; www.euroquartz.co.uk
OSCILLATION MODE & ESR
Frequency
(MHz)
1.0 ~ 1.3
2.01 ~ 3.0
3.01 ~ 3.2
3.21 ~ 3.5
3.51 ~ 3.9
3.91 ~ 5.0
5.01 ~ 7.0
7.01 ~ 10.0
10.0 ~ 30.0
30.1 ~ 45
24.0 ~ 100
80.0 ~ 160
110 ~ 250
Crystal Cut/
Oscillation Mode
SL Fund.
AT Fund.
AT Fund.
AT Fund.
AT Fund
AT Fund.
AT Fund.
AT Fund.
AT Fund.
AT Fund.
AT 3
rd
OT
AT 5th OT
AT 7th OT
ESR (max)
(Ohms)
5000
400
200
150
120
100
50
35
25
20
40
70
120
FREQUENCY STABILITY OVER TEMPERATURE
Operating
Temp. °C
0° to +50°
-10° to +60°
-20° to +70°
-30° to +80°
-40° to +90°
-55° to +105°
Temperature Stability (ppm)
±3
ü
ü
X
X
X
X
±5
ü
ü
ü
X
X
X
±7.5
ü
ü
ü
X
X
X
±10
ü
ü
ü
ü
X
X
±15
ü
ü
ü
ü
ü
X
±20
ü
ü
ü
ü
ü
ü
±30
ü
ü
ü
ü
ü
ü
PART NUMBER GENERATION
HC49 crystal part numbers are derived as follows:
ü
Indicates this stability is available over the stated operating temp. range
Example:
16.000MHz HC49/30/50/10/30pF/ATF
Frequency/Holder/Calibration/Temp. Stability/ Temp. Range/Circuit
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 1460 230000 Fax: +44 1460 230001 email: info@euroquartz.co.uk web: www.euroquartz.co.uk
Switching Power Supply Study Group
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