Quectel EC25 series User Manual

criteria bel
o
 Keep l
a
200m
m
 Keep
U
 Assure
ground
 To avo
shield
t
 In ord
e
should
and th
protect
USIM
p
 The pu
and se
n
3.10. U
S
EC25 cont
a
specificatio
n
used for A
T
upgrade. T
h
Table 10:
U
Pin Name
USB_DP
USB_DM
USB_VB
U
GND
More detail
s
The USB i
n
figure sho
w
E
o
w in the U
S
a
yout of US
I
m
.
U
SIM card s
i
the ground
and USIM
_
id cross-tal
k
t
hem with s
u
e
r to offer g
o
not be mor
e
e USIM c
a
ion. The 3
3
p
eripheral ci
ll-up resist
o
n
sitive occa
S
B Interf
a
a
ins one int
e
n
and supp
o
T
command,
h
e following
U
SB Pin De
s
Pin N
o
69
70
U
S 71
72
s
about the
n
terface is r
e
w
s the refere
E
C25-A_U
s
S
IM circuit d
e
I
M card as
c
i
gnal away
f
between t
h
_
VDD no le
s
k
between
u
rrounded g
o
od ESD p
r
e
than 50p
F
a
rd so as t
o
3
pFcapacito
r
rcuit should
o
r on USIM
_
sion areap
p
a
ce
e
grated Uni
v
o
rts high-sp
data trans
m
table show
s
s
cription
o
. I/O
IO
IO
PI
USB 2.0 sp
e
e
commend
e
nce circuit
o
s
e
r
_Manual
C
e
sign:
c
lose as po
s
f
rom RF an
d
h
e module
a
s
s than 0.5
m
USIM_DAT
A
round.
r
otection, it
F
. The 22oh
o
suppress
r
s are used
be close to
_
DATA line
c
p
lied, and s
h
v
ersal Seri
a
eed (480M
b
m
ission, GN
S
s
the pin de
f
Desc
USB
d
USB
d
Used
conn
e
Grou
n
e
cifications,
e
d to be re
s
o
f USB inter
f
C
onfidenti
a
s
sible to the
d
VBAT alig
n
a
nd the USI
M
m
m to maint
a
A
and USI
M
is recomm
e
mresistors
s
the EMI
s
for filtering
the USIM
c
c
an improve
h
ould be pla
c
a
l Bus (USB
b
ps) and ful
S
S NMEA
s
f
inition of U
S
ription
d
ifferential
d
d
ifferential
d
for detectin
e
ction.
n
d
please visi
t
s
erved for fi
f
ace.
a
l / Release
module. A
s
n
ment.
M
connecto
a
in the sam
e
M
_CLK, kee
e
nded to ad
s
hould be a
d
s
purious tr
a
interferen
c
c
onnecto
r
.
anti-
j
ammi
n
c
ed close t
o
) transceiv
e
l-speed (12
M
s
entences o
u
S
B interfac
e
d
ata bus (p
o
d
ata bus (m
i
g the USB
t
http://www
.
rmware up
g
d 34 /
6
s
sure the le
n
r
short and
e
electric p
o
p them aw
a
d TVS whi
c
d
ded in ser
i
a
nsmission
a
c
e of GSM9
0
n
g capabilit
y
o
the USIM
c
e
r which co
m
M
bps)mod
e
u
tput, softw
a
e
.
o
sitive).
i
nus).
.
usb.org/ho
m
g
rade in yo
u
L
EC25-AU
6
9
n
gth of trac
e
wide. Keep
o
tential.
a
y with ea
c
c
h parasitic
i
es betwee
n
and enhan
c
0
0.Please
n
y
when long
c
onnector.
m
plies with
t
e
s. The US
B
a
re debug
a
Comment
Require di
f
impedanc
e
Require di
f
impedanc
e
Typical 5.
0
m
e.
u
r design.
T
L
TE Modul
e
ser Manu
a
e
is less tha
n
the width
o
c
h other an
d
capacitanc
e
n
the modul
e
c
e the ES
D
n
ote that th
e
layout trac
e
t
he USB 2.
0
B
interface i
s
a
nd firmwar
e
f
ferential
e
of 90Ω.
f
ferential
e
of 90Ω.
0
V
T
he followin
g
e
a
l
n
o
f
d
e
e
D
e
e
0
s
e
g

Quectel EC25 series Specifications

General

GNSS	GPS/GLONASS/BeiDou/Galileo/QZSS
Operating Temperature	-40°C to +85°C
Storage Temperature	-45°C to +90°C
Form Factor	LCC
Dimensions	29.0mm × 32.0mm × 2.4mm
Category	Cellular Module
LTE FDD	B1/B3/B5/B7/B8/B20
LTE TDD	B38/B40/B41
WCDMA	B1/B5/B8
Interfaces	USB 2.0, UART, PCM, I2C
Operating Voltage	3.3V to 4.3V
SIM Interface	1.8V/3V
Antenna Interface	Main and diversity antenna
Certifications	CE, FCC, PTCRB, GCF, IC, RCM
GSM	850/900/1800/1900 MHz