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

SWCX1 SWEPT QUARTZ CRYSTALS

Radiation-Resistant Miniature Crystals

8MHz to 250MHz

SWCX1 swept quartz crystals are designed for applications requiring

resistance to ionizing radiation. SWCX1 crystals are produced from

cultured quartz that is electrically 'swept' at high temperature to

remove interstital impurities within the crystalline structure. This

process produces crystal resonators that are superior to those utilizing

non-swept quartz on that they maintain their frequency and other

electrical characteristics under exposure to radiation levels of

100kRad (1kGy) and greater.

Further, as such applications requiring radiation resistance typically

also require various degrees of of high-reliability components, we

offer these resonators in three distinct screening options to meet

mission critial programme requirements from engineering to flight.

Radiation tolerance up to 100kRad total dose

High shock and vibration resistance

Ultra-high reliability

Custom designs available

Military and space screening available

Low ageing

Critical processes performed in Class 10 cleanroom

PACKAGING OPTIONS

SWCX1 crystals are avaialble in SMD or leaded formats.

Supplied: Tray packed (option for SM crystals)

16mm tape on 178mm or 330mm reels (only for SM crystals)

Per EIA 481 (see tape and reel data sheet 10109)

OUTLINES

FEATURES

A

8.00

8.00

B

3.56

3.56

C (max.)

1.78

1.78

D

1.14

7.87

E

1.52

1.02

F

-

3.81

SWCX1

Surface-mount

(mm)

SWCX1

Leaded (03)

(mm)

Dim.

DESCRIPTION

·

Military and aerospace

·

Satellite

·

Space exploration systems

·

Deep space probes

·

Telemetry

APPLICATIONS

PACKAGE DIMENSIONS

TERMINATIONS - PLATING

SM1

Gold Plated

SM2

Solder Plated

SM3 / 03

Solder Dipped

Designation

Termination

Page 1 of 2

ELECTRICAL SPECIFICATION

Specifications are typical unless otherwise noted.

Package Style:

SWCX1 (SM)

SWCX1 (03)

Frequency Range:

8.0MHz to 250.0MHz

Motional Resistance (R1) @ 25°C

at 32MHz:

25Ω

at 155.2MHz:

15Ω

Motional Capacitance (C1) @ 25°C

at 32MHz:

6.2fF

at 155.2MHz:

1.0fF

Shunt Capacitance (C0) @25°C:

2.3pF

Quality Factor (Q) @ 25°C:

30k

Load Capacitance (CL)

<50MHz:

20pF

>50MHz:

10pF

Drive Level

<50MHz:

500µW maximum

>50MHz:

200µW maximum

GENERAL SPECIFICATION

Specifications are typical unless otherwise noted.

Calibration Tolerance @ 25°C:

±100ppm

or tighter, as required

Temperature Stability:

Refer to CX1 AT datasheet

Ageing First Year:

±2ppm maximum.

Shock Survival*:

3,000g peak 0.3ms, ½ sine

Vibration Survival:

20g, 10~2,000Hz

swept sine