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Table 13:Lo
ogic Levels
s of Digital I
Parameter
r
V
IL
V
IH
V
OL
V
OH
The module
e provides
1.8V UART
equipped w
ith a 3.3V U
ART interfac
recommend
ded. The foll
owing figure
VDD_EXT
RI
DCD
CTS
RTS
DTR
TXD
RXD
Please visit
http://www.
ti.comfor mo
Another exa
ample with t
transistor tra
the circuitof
f solid line. P
Please pay a
should refer
r to input so
lid line of th
line of the m
module.
EC25-A_Us
E
All manuals and user guides at all-guides.com
I/O
Min
n.
-0.3
3
1.2
2
0
1.3
35
T interface.
A level tra
ce. A level tr
ranslator TX
e shows the
reference d
VCCA
0.1uF
OE
A1
A2
Translator
A3
A4
A5
A6
A7
51K
A8
Figure 2
20: Referenc
ce Circuit w
ore informat
tion.
anslation circ
cuit is show
attention to
the direction
e module. O
Output dotted
ser_ManualC
Confidentia
Max.
0.6
2.0
0.45
1.8
nslator sho
ould be use
d if your a
XS0108EPW
WR provided
by Texas In
design.
VCCB
V
0.1
1uF
GND
B1
B2
B3
B4
B5
B6
B7
51K
B8
with Transla
ator Chip
n as below.
Thecircuitof
f dotted line
n of connect
tion. Input d
dotted line of
d line of the
module sho
ould refer to
al / Release
d
37 / 6
69
L
LTE Module
e
EC25-AU
ser Manua
al
Unit
V
V
V
V
pplication is
s
nstrument is
s
VDD_MCU
RI_MCU
DCD_MCU
CTS_MCU
RTS_MCU
DTR_MCU
TXD_MCU
RXD_MCU
e can refer to
o
f the module
e
o output solid
d
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