Multi-Tech Systems MT3334SMI manual Typical Application

Chapter 1 - Introduction and Description

Typical Application

The table below shows the MT3334SMI pinouts and Figure 1-6 illustrates a typical OEM application.

Pin #	Circuit Type	Signal Description	Input/Output
1	RJ-11 Jack	Tip	Input/Output
2	RJ-11 Jack	Ring	Input/Output
26	External Call Status LEDs	DGND
29	External Call Status LEDs	DCD	Output
30	External Call Status LEDs	RX	Output
31	External Call Status LEDs	DTR	Output
32	External Call Status LEDs	TX	Output
33	Serial TTL	RTS	Input
34	Serial TTL	RXD	Output
35	Serial TTL	TXD	Input
36	Serial TTL	RI	Output
37	Serial TTL	DSR	Output
38	Serial TTL	CTS	Output
39	Serial TTL	DCD	Output
40	Serial TTL	DTR	Input
41	Serial TTL	DGND
61	Power	VCC
63	Audio	AGND
64	Audio	SPKR

RJ-11 Jack

1 - x

2 - x

3

4

5 - x

6 - x

		Speaker Driver
			Circuitry
1	64
2	63
	61		+5v DC Power

Reset	24	41
Call-status	26	40
		39
LED		38
Circuitry		37
	29	36
	30	35
	31	34
	32	33

Digital Ground

UART

Figure 1-6. MT3334SMI Typical OEM Application

MT3334SMI 13