Handling Notes for Crystal Oscillators

1. Shock & Drop • Vibration

Do not inflict excessive shock and mechanical vibration that

exceeds the norm, such as hitting or mistakenly dropping, when

transporting and mounting on a board. There are cases when

pieces of crystal break, and pieces that are used become

damaged, and become inoperable. When a shock or vibration that

exceeds the norm has been inflicted, make sure to check the

characteristics.

4. Mounting Precautions

Leaded Devices

The special glass, located where the lead of the retainer base comes out, is aligned with the coefficient of thermal expansion of the lead, If the

glass is damaged and cracks appear, there may be cases in which performance deteriorates and it fails to operate.

Consequently, when making the device adhere closely and applying solder, align the gap of the hole of the board with the gap of the lead and

insert without excessive force.

When making the device adhere closely to a through hole board and applying solder, be careful that the solder does not get into the metal part

of the retainer base and cause a short. Putting in an insulation spacer is one more method of preventing a short circuit.

When the lead is mounted floating, fix it as far as possible so that contact with other parts and the breakage due to the fatigue, and the

mechanical resonance of the lead will not occur.

When the lead is bent and used, do not bend the lead directly from the base, separate it 0.5mm or more and then bend it. When bending,

before attaching to the board, fix the place where the lead comes out in advance and attach it after bending so that a crack does not occur in

the glass part.

Surface Mount Devices

The lead of the device and the pattern of the board is soldered on the surface. Since extreme deformation of the board tears off the pattern,

tears off the lead metal, cracks the solder and damages the sealed part of the device and there are cases in which performance deteriorates

and operation fails, use it within the stipulated bending conditions. Due to the small cracks in the board resulting from mounting, please pay

sufficient attention when attaching a device at the position where the warping of the board is great.

When using an automatic loading machine, as far as possible, select a type that has a small impact and use it while confirming that there is no

damage.

Surface mount devices are NOT flow soldering compatible.

5. Storage Condition

Since the long hour high temperature and low temperature storage, as well as the storage at high humidity are causes of deterioration in

frequency accuracy and solderability.

Parts should be stored in temperature range of -5 to +40C˚, humidity 40 to 60% RH, and avoid direct sunlight. Then use within 6 months.

2. Cleaning

Since a crystal piece can be broken by resonance when a crystal

device is cleaned by ultrasonic cleaning. Be careful when carrying

out ultrasonic cleaning.

3. Soldering conditions

Standard soldering iron conditions

Reflow conditions (Example)

To maintain the product reliability, please follow recommended conditions.

Recommended reflow Conditions vary depending upon products.

Please check with the respective specification for details.

Soldering iron

Time

Crystal Oscillators

280˚C ~ 340˚C

3

+1/−0sec. max

Time(sec.)

Crystal Oscillators/TCXOs

120sec. max

10sec. max

200˚C min

40sec. max

Peak:260

˚C

+0

-10

180

˚C

+0

-10