Multitech MT5600SMI Dokumentacja Pobierz pdf (Strona 105)

Chapter 7 – SocketModem ISDN (MT128SMI)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342C) 105

Electrical Characteristics

3.3 V and 5 V Serial SocketModem ISDN

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) Min 2.0 V Max 0.8 V

–RESET (24) Min 2.0 V Max 0.8 V

RX+, RX- (S/T Interface Receive)

Min 90 mV Peak

Normal Mode

Min 220 mV Peak

Sleep Mode

Input Capacitance

15 pF

Outputs Output High Output Low Current Drive

–DCD (39), –CTS (38), –DSR (37)

–RI (36), –RXD (34), TCLK (11),

RCLK (12)

Min 4 V/ 2.4 V Max 0.5 V/0.5 V (5 V/3.3 V) 3.2 mA,

7.0 mA for TXD

TX+, TX- (S/T Interface Transmit) 1.17 V peak @

6 mA RL= 50 ohms

Application Notes

Safety Warning Telecom / ISDN-ST

This device is for connection to the ISDN S/T side of an ISDN NT1 device only.

Interface Connector Contact Assignments

Pole (contact) assignments for 8-pole connections (plugs and jacks; i.e., RJ-45)

Function I.430 Polarity Optional Polarity Pole Number

TE NT

3 Transmit Receive + +

4 Receive Transmit + –

5 Receive Transmit – +

6 Transmit Receive – –

ISDN Interface

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Multitech MT5600SMI Dokumentacja Strona 105