Philips MCD388 Service Manual page 25

C024_TX--Transmit Board -- Circuit Diagram -- Part2
U2 U2
TP-ANT TP-ANT
ANT
1
3
2
C26 C26
5.6pF 5.6pF
4.7nH 4.7nH
L4 L4
3.3V
R16 R16
22 22
C38 C38
1uF 1uF
+1.8V U7 U7
LDO:XC6221A182MR 1.8V/250mA LDO:XC6221A182MR 1.8V/250mA
5
VOUT
C36 C36
C85 C85
4
NC
0.1uF 0.1uF
10uF 10uF
8-2
U3 U3
12
NC
11
NC
+1.8V
10
AVDD_SW
9
2
GND
8
RF_N
2 L3 L3 33nH 33nH
1 7
TXRX_SWITCH
6
RF_P
1
5
GND
4
AVDD_RF1
3
AVDD_PRE
2
AVDD_VCO
1
+1.8V
VCO_GUARD
C40 C40
0.1uF 0.1uF
CC2400 CC2400
DC3.3V_POWER
DC3.3V_POWER
R22 R22
33 33
1
VIN
C45 C45
C86 C86
0.1uF 0.1uF
3
EN
100uF 100uF
+1.8V
C32 C32 R14 R14
43k 43k
68pF 68pF C33 C33
68pF 68pF
+1.8V
DVDD3.3
DVDD1.8
RX
TX
DIO/PKT
DCLK/FIFO
CSn
SCLK
SI
SO
GIO6
NC
+1.8V
0.1uF 0.1uF
+1.8V
C41 C41
8-2
CLK_16M
R3 R3
270 270
3.3V
+1.8V
C27 C27 C28 C28
0.1uF 0.1uF 0.1uF 0.1uF
25
26
RF_CE_RX
27
RF_CE_RX
RF_CS_TX
28
RF_CE_TX
RF_DIO
29
RF_DIO
RF_DCLK
30
RF_DCLK
RF_PEN
31
RF_PEN
RF_SCLK
32
RF_SCLK
RF_SI
33
RF_SI
RF_SO
34
RF_SO
35
3.3V
36
43k 43k
R24 R24
0.1uF 0.1uF
C6 C6