Multi-tech-systems MT2456SMI22 Manuel d'utilisateur télécharger pdf (Page 9)

Chapter 3 - Electrical Characteristics

Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide 9

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)

2mA, Z

INT

= 120 Ω

Digital Input Capacitance

Min 2.4 V Max 0.4 V

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.

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Multi-tech-systems MT2456SMI22 Manuel d'utilisateur Page 9