Powering Down Your Device; Uart Dc Electrical Characteristics; Absolute Maximum Rating - Multitech SocketModem Cell Device Manual

Powering Down Your Device

CAUTION: Failing to properly power down the device before removing power may corrupt your device's file
system.
To properly power down your device, use the following sequence:
1. Issue the AT#SHDN command.
2. Wait 30 seconds.
3. Power off or disconnect power.

UART DC Electrical Characteristics

Units: Volts
Applies to the following pins:
Pin Signal Name
J33 -RTS
J34 -RXD
J35 -TXD
J36 -RI
Parameter
3.3 Volt Powered
Input Low Level
Input High Level
Output Low Level
Output High Level
5 Volt Powered
Input Low Level
Input High Level
Output Low Level
Output High Level

Absolute Maximum Rating

All models can run with an input voltage of either 3.3V or 5V. The maximum voltage on any signal pin equals the
input voltage.
®
SocketModem Cell MTSMC-L4N1 Device Guide for North America
Pin Signal Name
J37 -DSR
J38 -CTS
J39 -DCD
J40 -DTR
Minimum Maximum
0 0.55
1.5 3.3
0 0.55
2.35 3.3
0 0.8
2.3 5
0 0.55
3.7 5
SPECIFICATIONS
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