EURO
QUARTZ
18.4 x 9.3 x 19.7mm Leaded Crystal
Low frequencies with minimal ESR
Clost tolerances available
Customizable specification
Industry-standard package
DESCRIPTION
HC51 crystals are long-established standard crystals in the industry.
Basic HC51 crystals supply low frequencies with low ESR at low cost.
HC48 crystals are a package variant with larger diameter leads for
socket mounting.
HC51 and HC48 Crystals
100.0kHz to 70.0MHz
OUTLINE & DIMENSIONS
SPECIFICATION
Frequency Range:
Calibration Tolerance:
Frequency Stability over Temp:
Load Capacitance:
Drive Level:
Static Capacitance (C0):
Ageing:
RoHS Status:
Holder Types
100.0kHz to 70.0MHz
(See table for crystal cut and ESR)
From ±10ppm to ±100ppm
From ±10ppm to ±100ppm
(See
table)
From 8pF to 50pF or Series
1mW maximum
9pF maximum
±3ppm maximum in first year
±1ppm thereafter
RoHS Compliant*
HC51:
Two lead standard
HC48:
1.27mm leads for socket use
* If required, non-RoHS Compliant parts may be specified. Check with
Euroquartz technical sales.
ESR & OSCILLATION MODE
Frequency
Range
100.0kHz ~ 890kHz
890kHz ~ 1.8432MHz
1.8432 ~2.5MHz
2.5 ~ 3.5MHz
3.5 ~ 7.0MHz
7.0 ~ 12.0MHz
12.0 ~ 24.0MHz
9.0 ~ 30.0MHz
15.0 ~ 70.0MHz
Crystal Cut
Oscillation Mode
SL-Fundamental
AT-Fundamental
AT-Fundamental
AT-Fundamental
AT-Fundamental
AT-Fundamental
AT-Fundamental
AT-3rd Overtone
AT-5th Overtone
ESR
Ω Max.
3000
800
350
200
100
40
20
20
20
PART NUMBER FORMAT
Example:
1.8432MHz HC51/50/50/-10+60/30pF
Nominal Frequency
Package HC51 or HC48
Calibration tolerance at 25°C (±ppm)
Temp. stability over temp. range (±ppm)
Operating Temp. Range (- and +°C)
Load Capacitance (CL) in pF or SR = Series
STABILITY OVER TEMPERATURE RANGE (AT-CUT CRYSTALS)
Temp.
Range °C
0~+50
-10~+60
-20~+70
-30~+80
-40~+85
-55~+125
Stability ppm
±7.5 ±10 ±15 ±20 ±30 ±50 ±100
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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
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