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Seiko SC-20S Manual page 6

Quartz crystal unit

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[7] Dimensions and marking layout
1. Out Line Drawing
S * * * *
2-C0.15
#
1
1.0 Typ.
2.05±0.1
2. Marking
S □ □ □ □
*
*
*
1 
2 
3
*1
Specification
*2
CL ( 7pF:B、9pF:J、12.5pF:F )
*3
Year of Production( Last digit of year )
*4,5
Week of Production(01〜 52)
 
 
4. Recommended PAD lay-out
Materials : 
Case:Alumina ceramics、Ni-plated、Au-plated
Lead :Kovar material、Ni-plated
#
2
*
*
 
4
5
 
#1
0.7
0.8
  3. Lead Connection
#1
#2
0.7
Unit = mm
#2
Unit = mm
5/11

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