EURO
QUARTZ
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
HC49-4H and HC49-4HL Crystals
Low-cost, industry-standard crystal unit
AT-Cut strip crystal with hermetically sealed can
Frequency range 1.0MHz to 70MHz
Package height options available
Frequency Range: 3.2MHz to 70.0MHz
Oscillation Mode
AT-Cut Fundamental: 3.2MHz to 30.0MHz
BT-Cut Fundamental: 24.0MHz to 48.0MHz
AT-Cut 3rd Overtone: 27.0MHz to 70.0MHz
Calibration Tolerance at 25ºC
AT-Cut: ±30ppm (tolerance to ±10ppm
is available.)
BT-Cut: ±30ppm
Frequency Stability
AT-Cut: ±30ppm over -10° to +60°C
(Stability to ±10ppm is available)
BT-Cut: ±100ppm pver -10 to +60°C
Load Capacitance (CL): Series or from 8pF to 32pF
Ageing at 25°C: ±3ppm maximum, 1st year,
±1ppm per year thereafter.
Drive Level: 100mWatts typ., 500mWatts max.
Storage Temperature Range: -50° to +105°C
Crystal Holder: Resistance-weld hermetic seal
RoHS Status: Compliant
Supply format: Bulk pack (Radial tape and reel
is available)
SPECIFICATION
DESCRIPTION
HC49-4H crystals share the same base outline as the industry-
standard HC49 crystal. The crystal uses at AT-cut strip crystal with an
hermetically sealed can. HC49-4H crystals provide a low cost source
of system clock frequency.
PART NUMBER GENERATION
Part numbers for HC49-4H crystals are generated as follows:
8.000MHz HC49-4H/30/50/-20+70/30pF/30R
Example:
Frequency / holder /calibration tolerance /stability over op. temp.
/op. temp. range / circuit condition /ESR or operating mode
3.2 ~ 3.4 AT-Fund 300
3.5 ~ 6.0 AT-Fund 120
6.1 ~ 10.0 AT-Fund 60
10.1 ~ 30.0 AT-Fund 40
24.0 ~ 48.0 BT-Fund 40
27.0 ~ 30.0 AT-3rd OT 150
30.1 ~ 50.0 AT-3rd OT 100
50.1 ~ 70.0 AT-3rd OT 80
Frequency
Range MHz
Crystal Cut
Osc. Mode
ESR
Ohms Max.
ESR and OSCILLATION MODE
