92
RabbitCore RCM4400W
A.5 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.
Figure A-6. RCM4400W 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
Rabbit Semiconductor’s
Technical Note 303,
Conformal Coatings
, which is included with the online
documentation.
Conformally coated
area
C89
R30
2
R19
JP1
JP3
JP2
R22
R21
J2
R18
R14
C33
U3
C32
C31
C29
C30
C124
U21
C122
C1
19
T1
U23
C132
U22
C126
C131
C127
C125
J4
J3
R71
C1
12
L3
C160
C161
L12
L10
L1
1
C128
C129
R67
C106
C107 C134
L8C114
C111
L4
L6
C108
R54
R51
R52
R53
R62
U20
DS2
DS1
C139
C141
C141
C140
L14
U18
C135
C123
C154
C158
C117
L9
C11
5C168
R59
C155
C121
C120
C116
RF
SHIELD
C148
C146
C147
L13
C145
JP4
C35
U4
R1
C34
C51
1
C36
Y1
R9
C49
R8
U10
Q2
C20
U1
C18
C19
C21
C28
C27
U1
1
C54
R12
C3
C1
C5
C6
C2
C142
C4
C11
C10
C7
C145
U24
C143
R41
C138
Q1
C8
C50
U12
C52
R10
R20
R17
U13
R13
C9
R15
R16
C53
C55
U6
C41
C42
Y2
C137
C12
C14
C13
C15
C16
C17
FCC
ID:
VCB540D144
IC
ID:
7143A540D144
C169
R61
R60
S1
LINK
ACT
L16
C46
R2
C144
R64
C136
C163
D2
R70
R27
C149
C150
L17
RCM4400W
RABBIT
®
Summary of Contents for RabbitCore RCM4400W
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