Specifications

Chapter 5 – SocketModem IP (MT2456SMI-IP)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342F) 98
Electrical Characteristics
3.3V Serial for Board Rev. G (or higher)
3.3VDC Characteristics (TA = -40 °C to 85 °C; VDD = 3.3V ± 0.3V)
VDDMAX
= 3.6V
Digital Inputs
–DTR (40), –TXD (35), –RTS (33)
Note: These digital inputs are 5V tolerant
Input High
Min 2.0V
Input Low
Max 0.8V
Digital Inputs
–RESET (24)
Note: These digital inputs are 5V tolerant
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. 2.3V
Output Low
Max 0.4V
Current Drive
2mA
Digital Input Capacitance
5 pF
3.3V Serial for Board Rev. A through F
3.3VDC Characteristics (TA = -40 °C to 85 °C; VDD = 3.3V ± 0.3V)
VDDMAX
= 3.6V
Digital Inputs
–DTR (40), –TXD (35), –RTS (33)
Input High
Min 2.52V
Input Low
Max 0.8V
Digital Inputs
–RESET (24)
Note: These digital inputs are 5V tolerant
Input High
Min 2.52V
Input Low
Max 0.3V
Digital Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
Output High
Min. 2.3V
Output Low
Max 0.4V
Current Drive
2mA
Digital Input Capacitance
5 pF