Tel: 0044 (0)118 979 1238
Fax: 0044 (0)118 979 1283
E-mail: info@actcrystals.com
Parameter Symbol Specification Condition
Nominal Frequency fo 32.768KHz
Frequency Tolerance Δf/fo ±5, ±10, ±20, ±30ppm @25°C
Frequency v Temp Characteristics Δf/fo See drawing -10 ~ +60°C
Turnover Temperature Tm 25°C ±5°C
Freq. Temp. coefficient
β
-0.034 ±0.006ppm/°C²
Temp Operating Range Topr -40 ~ +85°C
Temp Storage Range Tstg -55 ~ +125°C
Equivalent Series Resistance ESR 50K
Ω
max @25°C
Shunt Capacitance Co 1.35pF Typical
Load Capacitance CL Please specif
y
Motional Capacitance C1 0.003pF T
y
pical
Capacitance Ratio
γ
450 Typical
Drive Level DL 1
μ
W max
Insulation Resistance IR 500M
Ω
min @ DC 100V ±15V
Aging (first year) Fa ±3ppm max 25°C ±3°C
Specification
The ACT200 is an ultra miniature surface mount Watch Crystal with a low power consumption making it ideal for
portable applications. Its small footprint renders it suitable for high density circuit boards or applications where
space is limited. The tape and reel packaging means that it is ideal for automatic placement machines (loose product
is also available).
The heart of the device is a heat resistant cylinder type crystal which provides for high stability characteristics
sufficient to allow reflow soldering.
ACT200
Please note that all parameters can not necessarily be specified in the same device
6 &12.5pF( Other options available )
Customer to specify: Frequency Tolerance, Load Capacitance, Operating Temperature Range & Storage Temperature Range
In line with our ongoing policy of product evolvement and improvement, the above specification may be subject to change without notice
ISO9001:2000 Registered
For quotations or further information please contact us at:
3 The Business Centre, Molly Millars Lane, Wokingham, Berkshire, RG41 2EY, UK
http://www.actcrystals.com
Issue 6 M4E
Date 30-06-06
Pad surface material Sn Cu
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For quotations or further information please contact us at:
3 The Business Centre, Molly Millars Lane, Wokingham, Berkshire, RG41 2EY, UK
http://www.actcrystals.com
In line with our ongoing policy of product evolvement and improvement, the above specification may be subject to change without notice
ISO9001:2000 Registered
Tel : 0044 (0)118 979 1238
Fax : 0044 (0)118 979 1283
email : info
@
actcr
y
stals.co
m
Issue 6 M4E
Date 30-06-06
ACT200 TAPE AND REEL
SOLDERING of SMD WATCH CRYSTALS
Reflow oven should be set up to emulate or better the maximum reflow profile shown in the diagram below. Note it is just as
important to conform to the times given as well as the temperatures.
Pre-heat should not exceed 180°C ±5°C Maximum time 120s
Peak soldering temperature should not exceed 260°C.
Time at peak temperature should not exceed 10 seconds.
Total reflow time above 120°C should not exceed 6 minutes.
WASH PROCESSES and SMD WATCH CRYSTALS
In order to achieve the optimum performance of plastic packaged watch crystals the plastic normally used is a polymer plastic
which is porous.
With some wash processes (Involving total immersion of the unit) the moisture ingress causes an impedance across the internal
crystal unit connections to stop it oscillating. In time (shortened by a drying process) the crystal will recover to its original
characteristics. The performance with regard to damp heat (humidity) is not effected by the use of this plastic.
Devices using an epoxy plastic are an option to overcome this problem should it cause any inconvenience. But this type of
package is increasingly becoming more difficult to obtain due to environmental problems with the use of epoxy plastics.
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