LTE910XF v6.00 CAT 1 Hardware User Guide JA20-UM-LTE-C1_v6 Page 4 Rev: 02 Date: 09/07/18
© Copyright 2018 Janus Remote Communications
Specifications subject to change without notice
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2. TECHNICAL SPECIFICATIONS
2.1 Electrical Specifications
2.1.1 Absolute Maximum Ratings
Parameter Signal
Signal
Maximum Rating
Main Power Supply
VCC
6.3V
I/O Voltage Reference
VREF
6.5V
2.1.2 Recommended Ratings & Module Pin out
2.1.2.1 Connectors J1 and J2
Pin
Name
Direction Description
Min
Typical
Max
If not used
1
VCC
Input
Main Power supply
3.5V
3.9V
5.5V
Must be implemented
VOL:
VOH:
Must be implemented
2
DOUT
Output
UART data out, I/O level tied to VREF
GND to
VREF x
if USB not used,
0.55V
0.67 to
No connection
VREF
VIL:
VIH:
Must be implemented
3
DIN
Input
UART data in, I/O level tied to VREF
GND to
VREF-0.4 if USB not used,
0.15V
V to VREF No connection
4
GND
Input
Ground Pin
0
Must be implemented
Controls HW_SHUTDOWN input on
Telit module, tie low for 200mS and
released to activate. Internally pulled
5 RESET_nIN
Input
up to VCC. Drive with open collector
VREF
No Connection
output. Assert only in an emergency
as the module will not gracefully exit
the cellular network when asserted.
6
VUSB
Input
Supply for USB interface
4.4V
5V
5.25V
No connection
7
USB_D+
I/O
USB differential Data + signal
No connection
8
USB_D-
I/O
USB differential Data - Signal
No connection
VIL:
VIH:
9
DTR
Input
Modem Data Terminal Ready input
GND to
VREF-0.4 Tie to GND
0.15V
V to VREF
10
GND
Input
Ground Pin
0
Must be implemented
11
GND
Input
Ground Pin
0
Must be implemented
VOL:
VOH:
12
CTS
Output
Modem Clear to Send hardware flow
GND to
VREF x
No Connection
control output
0.55V
0.67 to
VREF
Signal drives the onboard LED indicating
network status. OFF = Device OFF,
13 ON/nSLEEP Output
Fast blink = Searching for Network & Not
0
1.8V
No Connection
Registered, Slow Blink = Registered wtih
full service, Permanently on = call is
active. See Telit AT Commands Guide
for additional information.
Voltage reference for offboard I/O signals.
This signal drives the input voltage side
14
VREF
Input
of an onboard buffer which converts all
1.8V
1.8V or
5.5V
Must be Implemented
external I/O voltage from VREF range
3.3V
to 1.8V range to drive the onboard
Telit module.
15
GND
Input
Ground Pin
0
Must be implemented
