Datasheet

7
[ 7 ] Notes
1. Max three (3) times re-flow is allowed. Its recommended to manually solder when not enough/no solder
detected.( Using soldering iron at +350 °C × within 5 seconds)
2. Patterning on a board should follow our company recommended pattern.
3. Applying excessive excitation force to the crystal unit may cause deterioration damage.
4. Start up time of oscillation may be increased or no oscillation may occur unless adequate negative
resistance is allocated in the oscillation circuit In order to avoid this, please provide enough negative
resistance to the circuit design.
How to check the negative resistance
(1) Connect the resister(R) to the circuit in series with the crystal
unit.
(2) Adjust R so that oscillation can start (or stop).
(3) Measure R when oscillation just start (or stop) in above (2).
(4) Get the negative resistance
-R=R+CI value.
(5) Recommended -R
[-R]>CI × 5
5. It is recommended to do patterning to the oscillator as short as possible. Abnormal oscillation may
happened if the line is too long.
6. To avoid malfunction, no pattern across or near the crystal unit is allowed.
7. Few data or readings taken at user side may be different from our company’s data. Confirmation of the
different value is necessary before application.
8. Too much exciting shock or vibration may cause deterioration on damage.
The product may damage depends on the condition such as a shock in assembly machinery.
Please check your process condition in advance to minimize and maintain the shock level.
9. This product may be affected to ultrasonic cleaning. It is depends on the cleaning conditions (Cleaning
machine type/power/time/content/position etc.). The warranty will not cover any damage due to this type
of usage. Check conditions prior to use.
10. Condensation may occur when used/stored under high humidity condition.
Please take precautions to prevent condensation.
11. Please refer to packing specification for the storage method and packing standard.
INV
Rf
R
Rd
X’tal
Cg Cd