Datasheet

MRF49XA
DS70590C-page 76 Preliminary © 2009-2011 Microchip Technology Inc.
4.5 MRF49XA Schematic and Bill of
Materials
4.5.1 SCHEMATIC
FIGURE 4-5: MRF49XA SCHEMATIC
+3.3V
+3.3V
FINT
FSEL
RESE
T
RSSIO
INT/DIO
SDO
CS
SCK
SDI
C4
1000 pF
C1
C2
0.01 uF
C7
C5 C6
C3
2.2 uF
6.3V
50Ω ANT
J1
L1
L2 L3
TP1
CLK
TP2
GND
MRF49XA
U1
SDI
SCK
SDO
IRO
FSK/DATA/
RCLKOUT/FCAP/FINT
CLKOUT
INT/DIO
RSSIO
VDD
RFN
RFP
VSS
RFXTL/EXTREF
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
X1
10 MHz
Freq. L1 L2 L3 C5 C6 C7
433 MHz 390 nH 33 nH 47 nH 68 pF2.7 pF 5.1 pF
868 MHz 100 nH 8.2 nH 22 nH 1.2 pF 27 pF 2.7 pF
C1
47 pF
220 pF
915 MHz 100 nH 8.2 nH 22 nH 1.2 pF 27 pF 2.7 pF
33 pF
CS
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__
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IRO
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__
FSEL
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RESET
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