Technics MT5634SMI-92, MT5634SMI-34 manual I/O Electrical Characteristics, Introduction

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 14