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STM32WL33C8 Datasheet(PDF) 37 Page - STMicroelectronics

Part # STM32WL33C8
Description  Multiprotocol LPWAN 32-bit MCU Arm® Cortex®-M0 2(G)FSK, 4(G)FSK, ASK, D-BPSK, up to 256KB flash, 32KB SRAM
PDF  91 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32WL33C8 Datasheet(HTML) 37 Page - STMicroelectronics

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Figure 12. STM32WL33xx application circuit with SMPS, VFQFPN48 package
GND
GND
C52
C13
GND
GND
C12
PA2
1
PA3
2
VDD_1
3
PB3
4
PB4
5
PB5
6
PA0
7
PA4
8
PA11
9
PA10
10
PA9
11
PA8
12
VDDRF
27
OSCOUT
28
OSCIN
29
PA1
30
PB7
31
PB11
32
PB10
33
PB9
34
PB8
35
NRST
36
TX_HP
25
TX
26
STM32WL33
GND
C61
GND
VDD
VDD
C37
GND
X3
C68
C67
GND
R75
R74
R76
R49
VDD
C4
C2
C6
C10
C9
GND
C1
VDD
L5
GND
L1
L2
GND
Open
TX
Short
TX_HP
GND
L3
L4
L6
C11
GND
L10
GND
C54
GND
J1
C56
NM
C60
0R
L14
NM
C62
NM
C63
GND
GND
C66
48MHz
X1
C49
C50
GND
GND
L7
C15
C14
L8
GND
GND
VDD
GND
GND
Matching network for external antenna
Matching network for LPAWUR path
Table 6. Application circuit external components
Components
Description
C12
Decoupling capacitor for VDD_1
C52
Decoupling capacitor for VDD_2
C13
Decoupling capacitor for VDDRF
C61
Decoupling capacitor for VCAP
C1, C2
Decoupling capacitor for VDDSD. Input capacitors for internal DCDC converter
C4, C56
Output capacitors for internal DCDC converter
L2
Power inductor for DCDC converter.
L1
SMPS noise filter
C49, C50
Decoupling capacitor for PA VDD pin
C67, C68
32.768 kHz crystal loading capacitors
L3
RF choke inductor
L7, C14, C15
Filter/matching for RX path
L4, C9, L5, C10
Filter/matching for TX path
C6, L6, C11
Notch filter and low pass filter
C54, C60, C66
DC blocking capacitors
X1
48 MHz crystal
L10, L8
Filter/matching network for RX LPAWUR path
STM32WL33xx
Application circuits
DS14221 - Rev 5
page 37/91



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