Download ModemModule Model MT5634SMI Developer`s Guide

Chapter 1 - Introduction and Description
MT5634SMI Pin-out
The MT5634SMI uses a 20-pin interface to provide an on-board DAA with tip and ring connections, audio
circuit for call-progress monitoring, LED driver for call status annunciation, and serial interface via TTL level
signals.
DAA
DLED
Tip
Ring
1
2
-RESET
24
DGND
26
DCDIND
RXIND
DTRIND
TXIND
29
30
31
32
64
63
SPKR Audio
AGND
61
VCC
41
40
39
38
37
36
35
34
33
DGND
-DTRTTL
-DCDTTL
-CTSTTL
-DSRTTL
-RITTL
-TXDTTL
-RXDTTL
-RTSTTL
Serial TTL
Figure 1-5. MT5634SMI Pinout
MT5634SMI
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