Multitech MTSMC-C2-GP-N16, Device Manual, Page: 9 / 19

CHAPTER 3 –SPECIFICATIONS
9 SocketModem CDMA MTSMC-C2 Device Guide
Mounting Hardware
The board has three mounting holes at corners. Use #4 or M3 hardware for mounting the SocketModem to the
board. Refer to the Mechanical Drawings for more information.
Recommended Parts
Manufacturer Part Part Number
PEM PennEngineering Surface Mount Standoff SMTSO-M3-4ET
RAF Electronic Hardware 3/16” Hex Female Standoff 2051T-440-S-12 Zinc
RAF Electronic Hardware 4.5mm Hex Female Standoff 1251-3005-S-12 Zinc
Device Reset
The SocketModem is ready to accept commands after a fixed amount of time (“X” Time) after power-on or reset.
Model Time Constant "X" Time Minimum Reset Pulse
1
Maximum Reset Pulse
MTSMC-C2 250 ms 10 seconds 200 µs Less than 1 second
1 The SocketModem may respond to a shorter reset pulse.
Powering Down Your Device
CAUTION: Failing to properly shutdown 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 the device. Disconnect power from the device.
Serial Signal DC Electrical Characteristics
Units:
Volts
Applies to the following pins:
Pin Signal Name Pin Signal Name
J33 -RTS J37 -DSR
J34 -RXD J38 -CTS
J35 -TXD J39 -DCD
J36 -RI J40 -DTR
Parameter Minimum Maximum
3.3 Volt Powered
Input Low Level 0 0.55
Input High Level 1.5 3.3
Output Low Level 0 0.55
Output High Level 2.35 3.3