Specifications

Chapter 4 – SocketModem (MT2456SMI-22)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342C) 84
Electrical Characteristics
3.3 V and 5 V Serial SocketModem
3.3 V DC Characteristics (TA = 0°C to 70°C; VDD = 3.3 V ± 0.3 V) VDDMAX = 3.6 V
5 V DC Characteristics (TA = 0°C to 50°C; VDD = 5 V ± 0.25 V)
VDDMAX = 5.25 V
Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2.0 V Max 0.8 V
Outputs Output High Output Low
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
2mA, Z
INT
= 120 Ω
Min 2.4 V Max 0.4 V
Digital Input Capacitance
50pF