EURO
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 sales@euroquartz.co.uk www.euroquartz.co.uk
EURO
QUARTZ
HC49 Crystals
Low-cost, industry-standard crystal unit
Available to close tolerances
Frequency range 1.0MHz to 250MHz
Pakcage options
Frequency Range: 1.0MHz to 250MHz
Oscillation Mode: See table
Calibration Tolerance at 25ºC: from ±3ppm to ±50ppm
Frequency Stability: from ±3ppm to ±50ppm
Shunt Capacitance (C0): 7pF maximum
Load Capacitance (CL): Series or from 8pF to 32pF
( )
Ageing: ±3ppm maximum, 1st year,
±1ppm per year thereafter.
Drive Level: 100mW typical, 500mW maximum
Crystal Holder: Resistance-weld hermetic seal
Supply format: Bulk pack
SPECIFICATION
DESCRIPTION
HC49 crystals are long-established, industry-standard crystals.
Standard HC49 crystals provide a very low cost source of system
clock frequency and due to the dimensions of the crystal blank
employed, vthey are also able to be produced to very close
tolerances where required. Supply in several holder variants is
available
1.0 ~1.3 SL Fund. 5000
2.01 ~ 3.0 AT Fund. 400
3.01 ~ 3.2 AT Fund. 200
3.21 ~ 3.5 AT Fund. 150
3.51 ~ 3.9 AT Fund. 120
3.91 ~ 5.0 AT Fund. 100
5.01 ~ 7.0 AT Fund. 50
7.01 ~ 10.0 AT Fund. 35
10.0 ~ 30.0 AT Fund. 25
30.1 ~ 45.0 AT Fund. 20
24.0 ~ 100 AT 3rd OT 40
80.0 ~ 160 AT 5th OT 70
110 ~ 250 AT 7th OT 120
Frequency
Range MHz
Crystal Cut
Osc. Mode
ESR
Ω Max.
ESR and OSCILLATION MODE
16.000MHz HC49/30/50/-20+70/30pF/30R
Example:
Frequency
Package
HC49, HC49T
HC49/3W, HC49T/3W
HC50
Calibration tolerance
at 25°C (ppm)
Stability over temp. (ppm)
PART NUMBERS
Part numbers for HC49 family crystals are generated as follows:
Max ESR (i.e. 30R = 30Ω max.)
( )
'ATF' or 'BTF' for AT or
BT-cut fundamental,
3OT for 3rd overtone
Circuit Condition
(SR = Series or 8pF ~ 32pF)
Operating temp. range (°C)
General specification for HC49 family crystals