SI3225-FQ Datasheet, PDF (1/108 Pages) Silicon image – DUAL PROSLIC® PROGRAMMABLE CMOS SLIC/CODEC

Si3220/Si3225
DUAL PROSLIC^® PROGRAMMABLE CMOS SLIC/CODEC
Features
Performs all BORSCHT functions
Ideal for applications up to 18 kft
Internal balanced ringing to 65 V_rms
(Si3220)
External bulk ringer support (Si3225)
Low standby power consumption:
<70 mW per channel
Software-programmable parameters:
Ringing frequency, amplitude, cadence,
and waveshape (Si3220)
Two-wire ac impedance
Transhybrid balance
DC current loop feed (18–45 mA)
Loop closure and ring trip thresholds
Ground key detect threshold
Automatic switching of up to three battery
supplies
Applications
On-hook transmission
Loop or ground start operation with
smooth/abrupt polarity reversal
Modem/fax tone detection
DTMF generation/decoding
Dual tone generators
A-Law/µ-Law, linear PCM
companding
PCM and SPI bus digital interfaces
with programmable interrupts
GCI/IOM-2 mode support
3.3 or 5 V operation
GR-909 loop diagnostics
Audio diagnostics with loopback
12 kHz/16 kHz pulse metering
(Si3220)
FSK caller ID generation
Digital loop carriers
Central Office telephony
Pair gain remote terminals
Wireless local loop
Private Branch Exchange (PBX) systems
Cable telephony
Voice over IP/voice over DSL
ISDN terminal adapters
Description
The Dual ProSLIC^® is a series of low-voltage CMOS devices that integrate both
SLIC and codec functionality into a single IC to provide a complete dual-channel
analog telephone interface in accordance with all relevant LSSGR, ITU, and ETSI
specifications. The Si3220 includes internal ringing generation to eliminate
centralized ringers and ringing relays, and the Si3225 supports centralized ringing
for long loop and legacy applications. On-chip subscriber loop and audio testing
allows remote diagnostics and fault detection with no external test equipment or
relays. The Si3220 and Si3225 operate from a single 3.3 V or 5 V supply and
interface to standard PCM/SPI or GCI bus digital interfaces. The Si3200 linefeed
interface IC performs all high-voltage functions and operates from a 3.3 V or 5 V
supply as well as single or dual battery supplies up to 100 V. The Si3220 and
Si3225 are available in a 64-pin thin quad flat package (TQFP), and the Si3200 is
available in a thermally-enhanced 16-pin small outline (SOIC) package.
Functional Block Diagram
Part Number
Si3220
Si3225
Ringing
Method
Internal
External
Ringer
Ordering Information
See "Dual ProSLIC® Selection
Guide" on page 2.
Patents pending
CS
SCLK
SDO
SDI
DTX
DRX
FSYNC
PCLK
INT RESET
SPI
Control
Interface
PCM /
GCI
Interface
PLL
Si3220/25
Pulse Metering
2-Wire AC
Impedance
Subscriber Line
Diagnostics
Hybrid Balance
Ringing
Generator
& Ring Trip
Sense
DTMF Decode
FSK
DSP Catlelexrt ID
Dual Tone
Generators
Modem Tone
Detection
Programmable
Audio Filters
Gain Adjust
Loop Closure,
& Ground Key
Detection
Relay Drivers
Codec A
DAC
ADC
Codec B
DAC
ADC
SLIC A
Linefeed
Control
Linefeed
Monitor
SLIC B
Linefeed
Control
Linefeed
Monitor
Si3200
Linefeed
Interface
TIP
Channel A
RING
Si3200
Linefeed
Interface
TIP
Channel B
RING
Rev. 1.0 6/04
Copyright © 2004 by Silicon Laboratories
Si3220/Si3225
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.