SI3226 Datasheet, PDF (1/38 Pages) Silicon Laboratories – Dual ProSLIC® with DC-DC Controller

Si3226/7
Si3208/9
DUAL PROSLIC^® WITH DC-DC CONTROLLER
Features
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)
Applications
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
Description
The Dual ProSLIC^® is a family of low-voltage CMOS devices that integrate both
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
FSYNC
DRX
DTX
CS
SDI
SDO
SCLK
INT
RST
PCLK
Si3226/7
Si32068/9
PCM/
GCI
Interface
DTMF &
Tone Gen
Caller ID
SPI
Control
Interface
Ringing
Generator _DSP
Line Diagnostics
CODEC
ADC
SLIC
Linefeed
Control
DAC
Linefeed
Monitor
CODEC
ADC
SLIC
Linefeed
Control
PLL
DDCC--DDCCCCoonnttrroollleerrs ^DAC
Linefeed
Monitor
TIP
Channel 1
RING
TIP
Channel 2
RING
VDC
DC-DC BOM
VBAT
Ordering Information
See page 33.
Patents pending
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.