SI3060 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

SI3060

GLOBAL LINE-SIDE DAA FOR EMBEDDED SYSTEM-SIDE MODULE

Unspecified 

Si306x

5. AOUT PWM Output

Figure 3 illustrates an optional circuit to support the pulse width modulation (PWM) output capability of the Si306x

for call progress monitoring purposes. To enable this mode, the INTE bit (Register 2) should be set to 0, the PWME

bit (Register 1) set to 1, and the PWMM bits (Register 1) set to 00.

+5 VA

LS1

AOUT

R41

C41

Q6

NPN

Figure 3. AOUT PWM Circuit for Call Progress

Table 6. Component Values—AOUT PWM

Component

LS1

Q6

Value

Speaker BRT1209PF-06

NPN KSP13

Supplier

Intervox

Fairchild

C41

0.1 µF, 16 V, X7R, ±20%

Venkel, SMEC

R41

150 Ω, 1/16 W, ±5%

Venkel, SMEC, Panasonic

Registers 20 and 21 allow the receive and transmit paths to be attenuated linearly. When these registers are set to

all 0s, the receive and transmit paths are muted. These registers affect the call progress output only and do not

affect transmit and receive operations on the telephone line.

The PWMM[1:0] bits (Register 1, bits 5:4) select one of the three different PWM output modes for the AOUT signal,

including a delta-sigma data stream, a 32 kHz return to zero PWM output, and balanced 32 kHz PWM output.

Preliminary Rev. 0.9

11

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