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A.6 Conformal Coating
The areas around the 32 kHz real-time clock crystal oscillator have had the Dow Corning
silicone-based 1-2620 conformal coating applied. The conformally coated area is shown
in Figure A-6. The conformal coating protects these high-impedance circuits from the
effects of moisture and contaminants over time.
Conformally coated
areas
RP1
R45
J1
R12
U2
U5
R59
U3
R10
Y1
C1
R6
C14
R9
R2
C4
R5
U1 C5
R29
C3
C2
R7
R60
R61
R8
C11
C15
C18
U4
R18
R22
R23
JP6
JP7JP8JP4JP5
J6
C29
C43
C36
R1
R14
R15
R26
R27
R83
R76
C35
Y2
C58
R44 C61
R53
R54
R31
L3
C82
C80 R82
R30
C86
L2
J2
R35
R36
DS2
R65 C79
U13
R75 R68 C74 C78
R66
L1
R37
R38
RCM 33XX?NF
Figure A-6. RCM3360/RCM3370 Areas Receiving Conformal Coating
Any components in the conformally coated area may be replaced using standard soldering
procedures for surface-mounted components. A new conformal coating should then be
applied to offer continuing protection against the effects of moisture and contaminants.
NOTE: For more information on conformal coatings, refer to Technical Note 303,
Conformal Coatings .
74
RabbitCore RCM3360/RCM3370
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