Rev. 1.3 6/06
Copyright 2006 by Silicon Laboratories
Si3220/25 Si3200/02
Not
Recommended
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Si3220/25
Si3200/02
D UAL P ROSLIC P ROGRAMMABLE CM OS SLIC/C ODEC
Features
Applications
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 or 5 V supply and
interface to standard PCM/SPI or GCI bus digital interfaces. The Si3200/2 linefeed
ICs perform all high-voltage functions and operate from a 3.3 or 5 V supply as well
as single or dual battery supplies up to 100 V (Si3200) or 125 V (Si3202). The
Si3220 and Si3225 are available in a 64-pin thin quad flat package (TQFP), and the
Si3200/2 is available in a thermally-enhanced 16-pin small outline (SOIC) package.
Functional Block Diagram
Performs all BORSCHT functions
Ideal for applications up to 18 kft
Internal balanced and unbalanced ringing
(Si3220)
External bulk ringer support (Si3225)
Software-programmable parameters:
Ringing frequency, amplitude, cadence,
and waveshape (Si3220)
Two-wire ac impedance
Transhybrid balance
DC current loop feed
Loop closure and ring trip thresholds
Ground key detect threshold
Automatic switching of up to three battery
supplies
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/-Law, linear PCM
companding
PCM and SPI bus digital interfaces
with programmable interrupts
GCI 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
Lead-free/RoHS-compliant
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
text
DAC
ADC
Linefeed
Control
Linefeed
Monitor
DAC
ADC
Linefeed
Control
Linefeed
Monitor
SLIC A
SLIC B
Codec A
Codec B
DSP
SPI
Control
Interface
PCM /
GCI
Interface
PLL
Si3220/25
Linefeed
Interface
Linefeed
Interface
2-Wire AC
Impedance
Hybrid Balance
Pulse Metering
Subscriber Line
Diagnostics
DTMF Decode
Programmable
Audio Filters
Gain Adjust
Dual Tone
Generators
Modem Tone
Detection
Ringing
Generator
& Ring Trip
Sense
Loop Closure,
& Ground Key
Detection
FSK
Caller ID
Relay Drivers
CS
SCLK
SDO
SDI
DTX
DRX
FSYNC
INT RESET
PCLK
TIP
Channel A
RING
TIP
RING
Channel B
Si3200/2
U.S. Patent #6,567,521
U.S. Patent #6,812,744
Other patents pending
Ordering Information
See “Dual ProSLIC Selection
Part Number
Ringing
Method
Si3220
Internal
Si3225
External
Ringer