Broadcom
®
August 27, 2015 • 920737TAG04-HWUM101-RDS
Page 16
Schematics
BCM920737TAG-04 WICED Smart Tag Hardware User Manual
Figure 5: RF Schematics
Note:
Antenna matching network.
Please note that the
value on those components
may vary by different
layout and different
housing design.
Note:
"Pi" harmonic
filter for
2nd and 3rd
harmonic
+/- 0.1pF
+/- 0.1pF
Glass XTAL 3.2x2.5
Layout note: use antenna from 200-121921-0000 P1
VDDC and VDDRF can come from internal LDO or external LDO
internal LDO: RD6=BC, RD5=BC
external LDO: RD6=AC, RD5=AC
GND
FEED
1P2VC
VDDIO
1P2VRF
LDOext
LDOint
LDOint
LDOext
EXT_LDO_IN
EXT_LDO_IN
P12/P26
2,5
P11/P27
2,5
R25
0
R26
0 (DNI)
C9
1uF
C15
1.8pF
C21
12pF
RD6
0
INSTALL POSITION B
A
B
C
U2B
BCM20737A1KML2G
QFN32H_0.5mm
VD
D
F
E
5
V
DDV
CO
7
RF
6
XTALI
9
XTALO
10
L
D
OOU
T
3
LD
O
IN
2
VD
D
IF
4
VD
D
PL
L
8
FB2
120Ohms
J1
20279-001E-04
RF
_
IN
S
GN
D
G1
GN
D
G2
Y1
24.000MHz
1
3
2
4
C6
47uF
RD5
0
INSTALL POSITION B
A
B
C
C20
12pF
L1 10uH
1
2
C8
2.2uF
C13
0.01uF
C12
0.01uF
C17
1.8pF (DNI)
FB1
120Ohms
RD7
0
INSTALL POSITION A
A
B
C
R24
2.7nH
C31
22uF
XC9265B1214R-G
U4
DFN6H_0.55mm
VIN
6
LX
1
VOUT
3
NC
5
CE
4
HS-GND
H
GND
2
C14
1.8pF
C11
10pF
C16
1.8pF (DNI)
C7
47uF
C19
15pF
C18
15pF
A1
INV_F_ANTENNA
1
2
R28
10M
C10
0.01uF
Y2
0.03277MHz
R27
0 (DNI)
C30
22uF
Broadcom
Confidential
