EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE

Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001

info@euroquartz.co.uk

www.euroquartz.co.uk

CRYSTAL EQUIVALENT CIRCUIT

R1 Motional Resistance

L1 Motional Inductance

C1 Motional Capacitance

C0 Shunt Capacitance

CONVENTIONAL SERIES OSCILLATOR CIRCUIT

FIGURE 1

CX1H Typical Motional Resistance R1

FIGURE 2

CX1H Typical Motional Capacitance C1

FIGURE 3

CX1H Typical Quality Factor (Q)

FIGURE 4

CX1H Typical Turning Point Temperature (To)

Note: Frequency f at temperature T is related to frequency F0 at

turning point temperature To by:

f-fo

fo

Turning Point Temperature

CX1H CRYSTAL

Miniature Crystal for Series Oscillators

10kHz to 600kHz

PACKAGE HANDLING

The CX crystal is hermetically sealed in a ceramic package. Normal

handling and soldering precautions for small, low thermal mass parts

are adequate when installing or testing CX crystals. CX crystals may

be wave soldered with proper precaution taken to avoid desoldering

the leads. A slow machine rate or too high a pre-heat temperature or

solder bath temperature may damage the crystals. Lead to package

solder interface temperature should not exceed 175°C, glass lid

to package seal rim temperature should not exceed 210°C. If

the seal rim reaches temperatures above the maximum specified, the

package may lose its hermeticity. Loss of hermeticity results in a

frequency decrease and motional resistance increase.