CHAPTER 3 SPECIFICATIONS
SocketModem
®
Cell MTSMC-LVW3 Device Guide
11
Parameter
Minimum
Maximum
Output Low Level
0
0.55
Output High Level
3.7
5
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
VIL Min
VIL Max
VIH Min
VIH Max
VOL Min
VOL Max
VOH Min VOH 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 DN
--
0.8
2
--
--
0.3
2.8
--
J41
GND
--
--
--
--
--
--
--
--
J58
-LED LINK
--
--
--
--
0
0.45
2.85
3.3
J61
VCC
--
--
--
--
--
--
--
--
J63
GND
--
--
--
--
--
--
--
--
Pinout Specifications
Pin
Signal Name
Logic Level Voltage
1
In/Out
Description
J24
–RESET
3.3 – 5.0
I
Device reset (active low)
J25
USB VBUS
3.3 – 5.0
I
USB power supply input
J26
GND
GND
GND
Ground
J27
USB DP
3.3
I/O
USB data
J28
USB DN
3.3
I/O
USB data
J33
–RTS
5.0
I
Request to send (active low)
J34
–RXD
5.0
O
Received data (active low)
J35
–TXD
5.0
I
Transmitted data (active low)
J36
–RI
5.0
O
Ring indicator (active low)
J37
–DSR
5.0
O
Data set ready (active low)
J38
–CTS
5.0
O
Clear to send (active low)
J39
–DCD
5.0
O
Data carrier detect (active low)
