SPECIFICATIONS
SocketModem
®
Cell LTE MTSMC-Lxx Device Guide
17
Pinout Specifications
Pin
Signal Name
Logic Level Voltage
1
In/Out
Description
J24
–RESET
3.3 – 5.0
I
Device reset (active low)
J25
USB VBUS
3.3 – 5.0
I
USB power supply input
J26
GND
GND
GND
Ground
J27
USB DP
3.3
I/O
USB data
J28
USB DN
3.3
I/O
USB data
J33
–RTS
5.0
I
Request to send (active low)
J34
–RXD
5.0
O
Received data (active low)
J35
–TXD
5.0
I
Transmitted data (active low)
J36
–RI
5.0
O
Ring indicator (active low)
J37
–DSR
5.0
O
Data set ready (active low)
J38
–CTS
5.0
O
Clear to send (active low)
J39
–DCD
5.0
O
Data carrier detect (active low)
J40
–DTR
5.0
I
Data terminal ready (active low)
J41
GND
GND
GND
Ground
J58
–LED LINK
3.3
O
Link status (active low, can sink up to
150mA)
J61
VCC
5.0
PWR
DC input power
J63
GND
GND
GND
Ground
1
A hyphen (-) indicates a range of acceptable logic levels.
Pin Availability by Build
Pin
Signal Name
Serial Only
USB Only
J24
–RESET
X
X
J25
USB VBUS
X
J26
GND
X
X
J27
USB DP
X
J28
USB DN
X
J33
–RTS
X
J34
–RXD
X
J35
–TXD
X
J36
–RI
X
J37
–DSR
X
