Uart Dc Electrical Characteristics; Absolute Maximum Rating; Electrical Characteristics Other Pins - Multitech SocketModem MTSMC-L4E1 Manual

2. Wait 30 seconds.
3. Power off or disconnect power.
Note: If you send AT#SHDN and do not remove power, the radio restarts after 60 seconds.

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.

Electrical Characteristics Other Pins

Pin Signal
Name
J24 -RESET
J25 USB VBUS
J26 GND
J27 USB DP
®
SocketModem Cell MTSMC-L4E1 Device Guide for Europe
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
VIL Min VIL Max VIH Min
-- 0.8 2.0
-0.3 0.8 2.0
-- -- --
-- 0.8 2
VIH Max VOL Min VOL Max
-- -- --
8.7 -- --
-- -- --
-- -- 0.3
SPECIFICATIONS
VOH Min VOH Max
-- --
-- --
-- --
2.8 --
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