Multitech MTSMC-C-N3 User Manual download pdf (Page 10)

CHAPTER 3 – SPECIFICATIONS

SocketModem EV-DO MTSMC-EV3 Device Guide

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

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

Signal Name

VIL

VIH

VOL

VOH

Min

Max

Min

Max

Min

Max

Min

Max

J24

-RESET

0.8

2.0

J25

USB VBUS

-0.3

0.8

2.0

8.7

J26

GND

J27

USB DP

0.8

0.3

2.8

J28

USB DM

0.8

0.3

2.8

J41

GND

J48

GPIO0

-0.3

0.8

2.0

5.5

0.4

2.9

J49

GPIO1

-0.3

0.8

2.0

5.5

0.4

2.9

J50

GPIO2

-0.3

0.8

2.0

5.5

0.4

2.9

J51

GPIO3

-0.3

0.8

2.0

5.5

0.4

2.9

J58

-LED LINK

0.45

2.85

3.3

J61

VCC

J63

GND

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 23 24

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Multitech MTSMC-C-N3 User Manual Page 10

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