Chapter 3 ￿ Electrical Characteristics

Chapter 3 – Electrical Characteristics

3.3V and 5V Serial SocketModem

3.3V DC Characteristics (TA = 0°C to 70°C; VDD = 3.3 V ± 0.3 V) VDDMAX = 3.6 V

5V 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)

Min 2.4 V

Max 0.4 V

 

2mA, Z INT = 120 Ω

 

 

 

Digital Input Capacitance

 

 

50pF

 

 

 

Handling Precautions

All electronic devices should be handled with certain precautions to avoid damage due to the accumulation of static charge. Although input protection circuitry has been incorporated into the devices to minimize the effect of this static buildup, proper precautions should be taken to avoid exposure to electrostatic discharge during handling and mounting.

Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide

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Multi-Tech Systems MT2456SMI22 manual 3V and 5V Serial SocketModem, Handling Precautions, Input High Input Low, 50pF