Manualshelf

Specifications

ManualsBrandsMultitech ManualsComputer equipmentMT9234SMI-P-92
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PART 2 – Cellular SocketModems Chapter 8 – SocketModemCell & iCell EV-DO (EV1)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342P) 127
DC Electrical Characteristics
5VDC Characteristics VDD = 5V (± 0.5V)
Digital Inputs
–DTR (40), –TXD (35), –RTS (33)
Input High
Min 2.0V
Input Low
Max 0.8V
–RESET
Input High
Min 2.0V
Input Low
Max 0.8V
Digital Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
Output High
Min 2.8V
Output Low
Max 0.55V
Current Drive:
4mA
Digital Input Capacitance
10 pF
Electrical Specifications
Pin Signal Name
V
IL
V
IH
V
OL
V
OH
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
2
0.3
2.8
J28
USB DM
0.8
2
0.3
2.8
J33
–RTS
-0.3
0.8
2.0
5.5
--
--
--
--
J34
–RXD
--
--
--
--
0.26
3.98
J35
–TXD
-0.3
0.8
2.0
5.5
--
--
--
--
J36
–RI
--
--
--
--
0.55
3.8
J37
–DSR
--
--
--
--
0.26
3.98
J38
–CTS
--
--
--
--
0.26
3.98
J39
–DCD
--
--
--
--
0.26
3.98
J40
–DTR
-0.3
0.8
2.0
5.5
--
--
--
--
J41
GND
--
--
--
--
--
--
--
--
J44
PCM OUT
--
--
--
--
0
0.45
2.2
2.7
J45
PCM IN
0
0.91
1.7
2.9
--
--
--
--
J46
PCM SYNC
--
--
--
--
0
0.45
2.2
2.7
J47
PCM CLK
--
--
--
--
0
0.45
2.2
2.7
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
0.45
2.85
3.3
J61
VCC
--
--
--
--
--
--
--
--
J63
GND
--
--
--
--
--
--
--
--
Absolute Maximum Rating:
VCC Voltage (Survival) -0.3V to +5.5V