SPT2AF-12.5PF20PPM Seiko Instruments, SPT2AF-12.5PF20PPM Datasheet - Page 11

• Manufacturer Part Number: SPT2AF-12.5PF20PPM
• Description: CRYSTAL 32.768KHZ 12.5PF SMD
• Manufacturer: Seiko Instruments
• Series: SP-T2A-Fr
• Type: kHz Crystal (Tuning Fork)r

Specifications of SPT2AF-12.5PF20PPM

• Frequency: 32.768kHz
• Frequency Tolerance: ±20ppm
• Load Capacitance: 12.5pF
• Operating Mode: Fundamental
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 4-SOJ, 5.50mm pitch
• Size / Dimension: 0.343" L x 0.146" W (8.70mm x 3.70mm)
• Height: 0.098" (2.50mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency Stability: -
• Other names: 728-1005-2

Quartz Crystal Unit Handling Precautions
CLEANING
Since a small, thin crystal chip is used for tuning fork crystal units and the frequency approximates that of an
ultrasonic cleaner, the crystal chip may break easily. Therefore, DO NOT perform ultrasonic cleaning.
MECHANICAL SHOCK
(1) Quartz crystal units are designed to withstand a drop from 75cm onto a hard wooden board at least 3 times.
(2) Unlike chip parts such as resistors, and capacitors, the SMD crystal unit has a crystal chip which is hermetical-
(3) Avoid mounting crystal unit to the board with mechanical vibration source including ultrasonic vibration source.
Quartz Crystal 2011
SMD Type Quartz Crystal Units
• Soldering
(1) An example of the reflow temperature profile is shown as follows (see Figure ).
However, their crystal chips may break depending on the conditions when they are dropped. Ensure that the
crystal unit functions normally before use if the crystal units have been dropped or subjected to an excessive
mechanical shock.
ly sealed inside. Therefore, check the influence of shock during automatic mounting or influence of deposition
of case to the board by ultrasonic vibration before use.
If the crystal unit is unavoidably mounted to the same board with mechanical vibration source, ensure that the
crystal unit functions normally.
Example of SMD product soldering conditions
250
200
150
100
50
170±10°C
(20°C peak: Lead-free products)
Note: the temperature is
50
the PCB surface temperature.
260°C peak.
100
250±10°C
220°C
Figure 
150
Time(sec.)
200
120±20sec
250
10±1sec
50±10sec
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