MRF49XA Datasheet, PDF (76/102 Pages) Microchip Technology – ISM Band Sub-GHz RF Transceiver

MRF49XA
4.5 MRF49XA Schematic and Bill of
Materials
4.5.1 SCHEMATIC
FIGURE 4-5:
MRF49XA SCHEMATIC
RSSIO
INT/DIO
SDI
SCK
__
CS
SDO
__
IRO
__
FSEL
FINT
TP1
CLK
TP2
GND
___
RESET
C4
1000 pF
+3.3V
C1
C2
0.01 uF
C3
2.2 uF
6.3V
+3.3V
U1
MRF49XA
1
__
16
SDI
INT/DIO
2
15
SCK
RSSIO
3 ^__
14
CS
VDD
4
13
SDO
RFN
5 ^__
12
IRO
RFP
6
___
11
FSK/DATA/FSEL
VSS
7
10 ^____
8 ^{RCLKOUT/FCAP/FINT RESET} 9
CLKOUT
RFXTL/EXTREF
X1
10 MHz
L1
C5
C6
L2
L3
C7
J1
50Ω ANT
Freq.
433 MHz
868 MHz
915 MHz
C1
220 pF
47 pF
33 pF
L1
390 nH
100 nH
100 nH
L2
33 nH
8.2 nH
8.2 nH
L3
47 nH
22 nH
22 nH
C5
2.7 pF
1.2 pF
1.2 pF
C6
68 pF
27 pF
27 pF
C7
5.1 pF
2.7 pF
2.7 pF
DS70590B-page 74
Preliminary
© 2009 Microchip Technology Inc.