Specifications

Chapter 6 – SocketEthernet IP (MTXCSEM)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342C) 99
SocketModem Configuration
Serial Configuration
The SocketEthernet IP uses a 23-pin interface to provide an on-board Ethernet media access controller, an Ethernet
physical layer (without the RJ-45 jack), an LED driver for Ethernet monitoring, and a serial interface.
Note: The shaded, bolded pins are SocketEthernet IP active pins.
SocketEthernet IP Pinout
Electrical Characteristics
3.3 V Serial
3.3 V DC Characteristics (TA = -40 °C to 85 °C; VDD = 3.3 V ± 0.3 V) VDDMAX = 3.6 V
Digital Inputs
–DTR (40), –TXD (35), –RTS (33), –RESET (24)
Note: These digital inputs are 5 volt tolerant
Input High
Min 2.52 V
Input Low
Max 0.8 V
Digital Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36),
–RXD (34)
Output High
Min. 2.3 V
Output Low
Max 0.4 V
Current Drive
2 mA
Digital Input Capacitance 5 pF
5 V Serial
5 V DC Characteristics (TA = 0 °C to 50 °C; VDD = 5 V ± 0.25 V) VDDMAX = 5.25 V
Digital Inputs
–DTR (40), –TXD (35), –RTS (33), –RESET (24)
Input High
Min 2.52 V
Input Low
Max .0.8 V
Digital Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36),
–RXD (34)
Output High
Min. 2.3 V
Output Low
Max 0.4 V
Current Drive
2 mA
Digital Input Capacitance 5 pF