Multitech MTSMC-C-N3 User Manual download pdf (Page 8)

CHAPTER 3 –SPECIFICATIONS

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 Pulse1

MTSMC-C2

250 ms

10 seconds

200 us

The SocketModem may respond to a shorter reset pulse.

RS-232 Signal DC Electrical Characteristics

Units: Volts

Applies to the following pins:

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

0.55

Input High Level

1.5

3.3

Output Low Level

0.55

Output High Level

2.35

3.3

5 Volt Powered

Input Low Level

0.8

Input High Level

2.3

Output Low Level

0.55

Output High Level

3.7

Absolute Maximum Rating

VCC Voltage (Survival) -0.3V to +5.5V

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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Multitech MTSMC-C-N3 User Manual Page 8

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