Quectel BG95 Series Hardware Design page 47

VDD_EXT
RI
DCD
CTS
RTS
DTR
TXD
RXD
Please visit http://www.ti.com for more information.
Another example with transistor translation circuit is shown as below. The circuit design of dotted line
section can refer to that of solid line section, in terms of both module input and output circuit designs, but
please pay attention to the direction of connection.
NOTE
Transistor circuit solution is not suitable for applications with high baud rates exceeding 460Kbps.
BG95_Hardware_Design
VCCA
0.1uF
120K
OE
A1
A2
A3
A4
A5
A6
A7
51K
A8
Figure 16: Reference Circuit with Translator Chip
Figure 17: Reference Circuit with Transistor Circuit
VCCB
0.1uF
GND
B1
B2
Translator
B3
B4
B5
B6
B7
51K
B8
LPWA Module Series
BG95 Hardware Design
VDD_MCU
RI_MCU
DCD_MCU
CTS_MCU
RTS_MCU
DTR_MCU
TXD_MCU
RXD_MCU
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