Chapter 3 – Electrical Characteristics

Chapter 3 – Electrical Characteristics

Introduction

Electrical characteristics for the 5V Serial SocketModem, 3.3V Serial SocketModem, 5V Parallel SocketModem, and the 3.3V Parallel SocketModem are presented in this chapter.

I/O Electrical Characteristics

5V Serial Standard (SMI) and Medical Device (SMI-HV) Build Options 5 Vdc Characteristics (TA = 0 °C to 50 °C; VDD = 5 V ± 0.25 V) VDDMAX = 5.25 V

Digital Inputs

Input High

Input Low

 

–DTR (40), –TXD (35), –RTS (33), –RESET (24)

Min 3.675 V

Max 1.4 V

 

Digital Outputs

Output High

Output Low

Current Drive

–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)

Min. 4 V

Max 0.4 V

2 ma

Digital Input Capacitance

 

 

5 PF

3.3V Serial Industrial Temperature (SMI-ITP) Build Option

3.3 Vdc Characteristics (TA = -40 °C to 85 °C; VDD = 3.3 V ± 0.3 V) VDDMAX = 3.6 V

Digital Inputs

Input High

Input Low

 

–DTR (40), –TXD (35), –RTS (33), –RESET (24)

Min 2.52 V

Max 0.9 V

 

Digital Outputs

Output High

Output Low

Current Drive

–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)

Min. 2.3 V

Max 0.4 V

2 ma

Digital Input Capacitance

 

 

5 PF

5V Parallel Standard (SMI) and Medical Device (SMI-HV) Build Options 5 Vdc Characteristics (TA = 0 °C to 50 °C; VDD = 5 V ± 0.25 V) VDDMAX = 5.25 V

Digital Inputs

Input High

Max. 1.4 V

 

–DS (40)

Min. 3.675 V

 

 

Digital Inputs (hysteresis input buffer)

Input High

Input Low

 

A0 (31), A1 (25), A2 (34), –WR (32), –RD (33)

Min. 3.675 V

Max. 1.4 V

 

Digital Input / Output

Input High

Input Low

 

Output buffer can source 12 mA at 0.4 V

Min. 3.675 V

Max. 1.4 V

 

DO (37), D1 (38), D2 (29), D3 (39), D4 (35), D5 (36), D6

 

 

 

(41), D7 (27)

 

 

 

Digital Output

Output High

Output Low

Current Drive

INT (30)

Min. 4 V

Max 0.4 V

2 ma

Digital Input Capacitance

 

 

5 PF

 

 

 

 

SocketModem Global MT5634SMI Developer’s Guide

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Technics MT5634SMI-92, MT5634SMI-34 manual Electrical Characteristics