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

THROUGH-HOLE CRYSTALS

Frequency Range:

1.0MHz to 250.0MHz

Calibration Tolerance at 25ºC:

from ±3ppm to ±50ppm

Frequency stability over temp:

from ±3ppm to ±100ppm

Load Capacitance:

8pF to 50pF, or Series

Ageing:

±3ppm max 1st year,

±1ppm max per year after

Drive level:

1mW max

Static capacitance (C0):

7pF max

Holder:

Resistance-weld, hermetic seal

Part Numbers for Holder Variants *

Holder Type

Holder Designation

Standard 2 lead:

HC49

Low height versions:

HC49/T (from 4.0MHz)

Centre Earth Lead:

HC49/3W

Centre Earth Lead (Low):

HC49/T/3W (from 4.0MHz)

‘Plug-in’ for use in socket:

HC-50

·

Very low cost crystal

·

Available with close tolerances

·

Fully customisable specification

·

Comprehensive Euroquartz stockholding

·

Industry-standard package with options

·

Very wide frequency range

HC49 SERIES CRYSTALS

* 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

FEATURES

GENERAL SPECIFICATION

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

Frequency

(MHz)

Crystal Cut/

Oscillation Mode

ESR (max)

(Ohms)

OSCILLATION MODE & ESR

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

AT Fund.

20

24.0 ~ 100

40

80.0 ~ 160

AT 5th OT

70

110 ~ 250

AT 7th OT

120

ü Indicates this stability is available over the stated operating temp. range

PART NUMBER GENERATION

HC49 crystal part numbers are derived as follows:

Example:

16.000MHz HC49/30/50/10/30pF/ATF

Frequency/Holder/Calibration/Temp. Stability/ Temp. Range/Circuit

FREQUENCY STABILITY OVER TEMPERATURE

0° to +50°

ü

ü

ü

ü

ü

ü

ü

-10° to +60°

ü

ü

ü

ü

ü

ü

ü

-20° to +70°

X

ü

ü

ü

ü

ü

ü

-30° to +80°

X

X

X

ü

ü

ü

ü

-40° to +90°

X

X

X

X

ü

ü

ü

-55° to +105°

X

X

X

X

X

ü

ü

Operating

Temp. °C

Temperature Stability (ppm)

±3

±5

±7.5

±10

±15

±20

±30