MTK6253+SKY7755 dual band

monelyy

C615 close to VDD28_OPLL
L603 close to VDD28_OPLL
C616 close to VDD28_RFVCO
This area forbid to put
the PA output matching
circuit.
ie lding
Suggest to connect to
VccRF(2.8V) to get better
HB Low PCL isolation
VDD28_OPLL
BT_SCLK_53
VRF_1
DCS1800P
DCS1800N
GSM900P
GSM900N
PAEN
GSM900N
BANDSW_DCS
PAIN_LB
DCS1800P
GSM850N
PCS1900P
GSM850P
DCS1800N
PCS1900N
PAIN_HB
GSM900P
BANDSW_DCS
VLOGIC
VLOGIC
VDD28_OPLL
VTCXO
VRF_1
VIO
VRF
VA
VRF
C603
nc
C34
nc
L15
4.3nH
R601
1K
C617
0
U1D
MT6253
F18
C25
D26
C29
D30
E19
D24
C27
D28
C31
D32
D20
E21
E31
F20
F22
F24
H30
H32
J31
J33
K30
K32
K34
L31
L33
M30
M32
N31
N33
P30
P32
P34
R31
T30
U29
QN
TXO_LB
PCS1900P
DCS1800N
GSM900N
QP
TXO_HB
PCS1900N
DCS1800P
GSM900P
GSM850N
IN
VDD28_OPLL
GSM850P
IP
VDD28_TXVCO
VDD28_TRXIF
VDD28_RXFE
GND_RXISO
RFVCO_MT
VDD28_RFVCO
GND_RFVCO
VDD28_SX
XTAL1
GND_SX
XTAL2_GND
VDD28_DCXO
FREF
VDD15_RFD
BPI_BUS1
VDD28_RFD
BPI_BUS3
BPI_BUS5
BPI_BUS0
BPI_BUS2
BPI_BUS4
L12
1.5nH
C38
nc
C601
22pF
C33
18pF
Z2
SAFEA1G84FA0F00
2
1
3
4
5
G
IN
OUT
OUT
G
C615
5.6pF
2 1
C601
150pF
C34
nc
C621
100nF
2 1
R601
1K
10pF
C611
nc
R608
50R
6
F
R609
0R
1
2
3
C37
7pF
R604
0R
33pF
C36
7pF
C607
22pF
C611
nc
C604
nc
C34
nc
L603
BLM15BB750SN1
L604
nc
C35
18pF
R602
47.5K
L14
2.2nH
R607
0R
C613
22pF
C609
22uF
U602
X'tal 26MHz
1
2 3
4
GND
GND HOT
GND
E601
ANTENNA
C624
100nF
2 1
C611
6pF
L601
0R
L13
15nH
R602
NC
J601
TST_PORT
2
3 4
1
5
6
U601
SKY77555
3
5
10
11
7
12
15
9
19
17
20
14 8
21
22
24
26
27
25
1
13
18
2
4
6 16
23
GND
BS
LB_IN
GND
TX_EN
VBATT
GND
HB_IN
RxLB
GND
GND
GND GND
GND
GND
GND
ANT
GND
GND
GND
GND
RxHB
GND
VLOGIC
VRAMP GND
GND
L604
27nH
C616
1uF
2 1
C602
nc
Z1
SAFEA942MFL0F00
2
1
3
4
5
G
IN
OUT
OUT
G
L605
nc
C627 22pF
C620
1uF
2 1
【文件名】:11126@52RD_MT6253+SKY77555 dual band V2.pdf
【格　式】:pdf
【大　小】:24K
【简　介】:
【目　录】:
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