SI3019-F-FM View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

SI3019-F-FM

PROGRAMMABLE VOICE DAA SOLUTIONS

Silicon Laboratories 

Si3050 + Si3011/18/19

4. AOUT PWM Output

Table 12. Component Values—AOUT PWM

Figure 19 illustrates an optional circuit to support the

pulse width modulation (PWM) output capability of the

Si3050 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 2) set to 00.

Component

Value

LS1

Speaker BRT1209PF-06

Q6

NPN KSP13

C41

0.1 µF, 16 V, X7R, ±20%

Supplier

Intervox

Fairchild

Venkel, SMEC

R41

150 1/10 W, ±5% Venkel, SMEC,

+5VA

Panasonic

AOUT

R41

C41

LS1

Q6

Figure 19. AOUT PWM Circuit for Call Progress

Registers 20 and 21 allow the receive and transmit

paths to be attenuated linearly. When these registers

are set to all 0s, the transmit and receive 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

three different PWM output modes for the AOUT signal,

including a delta-sigma data stream, a 32 kHz return to

0 PWM output, and a balanced 32 kHz PWM output.

20

Rev. 1.5

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