Preliminary Rev. 0.33 6/07

Copyright © 2007 by Silicon Laboratories

Si3226/7 Si3208/9

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

Si3226/7

Si3208/9

Features

Applications

Description

SLIC and CODEC functionality into a single IC. In combination with a linefeed IC

(LFIC), they provide a complete two-channel analog telephone interface in

accordance with all relevant LSSGR, ITU, and ETSI specifications. The Dual

ProSLIC devices (Si3226/7) operate from a single 3.3 V supply and interface to

standard PCM/SPI or GCI bus digital interfaces. The LFICs (Si3208/9) perform all

high-voltage functions and operate from a 3.3 V supply as well as high-voltage

battery supplies. The Si3208 is rated for –110 V, and the Si3209 is rated for –

135 V. The Dual ProSLIC devices are available in a 64-pin thin quad flat package

(TQFP), and the LFICs are available in a 40-pin, quad flat no-lead package

(QFN).

Functional Block Diagram

Performs all BORSCHT functions

Ideal for short- or long-loop applications

Internal balanced or unbalanced ringing

Low power consumption

Software-programmable parameters:

Ringing frequency, amplitude,

cadence, and waveshape

Two-wire ac impedance

Transhybrid balance

DC current loop feed (10–45 mA)

Loop closure and ring trip thresholds

Ground key detect threshold

Integrated dc-dc controller

Wideband CODEC (Si3227)

Low-power sleep mode

On-hook transmission

Loop or ground start operation

Smooth polarity reversal

DTMF generator/decoder

A-Law/µ-Law companding,

linear PCM

PCM and SPI bus digital interfaces

with programmable interrupts

GCI/IOM-2 mode support

3.3 V operation

GR-909 loop diagnostics

Audio diagnostics with loopback

Pb-free/RoHS-compliant packaging

Customer Premises Equipment (CPE)

Optical Network Terminals (ONT)

Private Branch Exchange (PBX)

Cable EMTAs, ATAs, VoIP

Gateways

RING

TIP

RING

TIP

SPI

Control

Interface

PCM/

GCI

Interface

DSP

DTMF &

Tone Gen

Caller ID

Ringing

Generator

ADC

DAC

CODEC

ADC

DAC

CODEC

SLIC

Linefeed

Control

Linefeed

Monitor

SLIC

Linefeed

Control

Linefeed

Monitor

Channel 1

Channel 2

DC-DC Controller

Line Diagnostics

PLL

PCLK

FSYNC

DRX

DTX

CS

SDI

SDO

SCLK

INT

RST

Si3226

Si3206

DC-DC BOM

VDC

VBAT

RING

TIP

RING

TIP

SPI

Control

Interface

PCM/

GCI

Interface

DSP

DTMF &

Tone Gen

Caller ID

Ringing

Generator

ADC

DAC

CODEC

ADC

DAC

CODEC

ADC

DAC

CODEC

ADC

DAC

CODEC

SLIC

Linefeed

Control

Linefeed

Monitor

SLIC

Linefeed

Control

Linefeed

Monitor

Channel 1

Channel 2

DC-DC Controllers

Line Diagnostics

PLL

PCLK

FSYNC

DRX

DTX

CS

SDI

SDO

SCLK

INT

RST

Si3226/7

DC-DC BOM

VDC

VBAT

Si3208/9

Patents pending

Ordering Information

See page 33.