ProSLIC Copyright © 2013 by Silicon Laboratories 5.10.2013
Si3217x-C
ProSLIC® Single-Chip FXS Solutions
Description
The Si3217x devices are pin-compatible single-channel ProSLIC
products that implement a complete foreign exchange station
(FXS) telephony interface solution in accordance with all relevant
LSSGR, ITU, and ETSI specifications. The Si3217x ProSLIC ICs
are available in a 5x7 mm 42-pin QFN package and operate from
a 3.3 V supply and support 3.3 V and 1.8 V I/O.
The Si32170/1/6/7 devices use a standard PCM/SPI digital
interface to connect to SoCs, while the Si32172/3/5 devices use
Silicon Labs' proprietary three-wire digital Integrated Serial
Interface (ISI) to connect to SoCs with the ISI pre-integrated.
The Si3217x integrated dc-dc controller automatically generates
the optimal battery voltages required for each line state. The
Si3217x ICs are available with voltage ratings of –110 V or –140 V
to support a wide range of ringing voltages. See the Ordering
Guide for the voltage rating of each Si3217x version.
For more information, visit the Si3217x ProSLIC web page.
Features
-Complete FXS solution in 5x7 mm
-Choice of PCM/SPI Interfaces or 3-wire ISI bus that combines
PCM, SPI, and interrupt data
-Performs all BORSCHT functions
-Ideal for short to medium loops
-Global programmability
-Internal balanced or unbalanced ringing
-Patented low power ringing
-Simplified configuration and diagnostics
-Supported by ProSLIC API
-Ultra low power consumption
-Tracking dc-dc controller with direct connection to MOSFET
-Wideband voice support (Si32172/3/6/7)
-On-hook transmission
-Loop or ground start operation
-Smooth polarity reversal
-A-Law/u-Law companding, linear PCM
-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
-DTMF generation
-DTMF detection (Si32170/1/5)
-Pulse metering
-3.3 V operation
-Support for 1.8 V I/O
-Maximum battery up to –140 V
-Pb-free/RoHS-compliant packaging
Applications
-Customer Premise Equipment (CPE)
-VoIP DSL Gateways and Routers
-Wireless Local Loop (WLL)
-Integrated Access Devices (IAD)
-Analog Terminal Adapters (ATA)
-Small Office/Home Office PBX
Ordering Guide
Functional Block Diagrams
Part # SoC Interface Max Vbat Wideband DTMF Detection Pulse Metering Temperature
Si32170-C-FM1 PCM/SPI –140 V
0 to 70 °C
Si32170-C-GM1 –40 to 85 °C
Si32171-C-FM1 PCM/SPI –110 V
0 to 70 °C
Si32171-C-GM1 –40 to 85 °C
Si32172-C-FM1 ISI –110 V 0 to 70 °C
Si32172-C-GM1 –40 to 85 °C
Si32173-C-FM1 ISI –140 V 0 to 70 °C
Si32173-C-GM1 –40 to 85 °C
Si32175-C-FM1 ISI –110 V
0 to 70 °C
Si32175-C-GM1 –40 to 85 °C
Si32176-C-FM1 PCM/SPI –110 V 0 to 70 °C
Si32176-C-GM1 –40 to 85 °C
Si32177-C-FM1 PCM/SPI –140 V 0 to 70 °C
Si32177-C-GM1 –40 to 85 °C
RING
TIP
SPI
Control
Interface
PCM/
GCI
Interface
DSP
DTMF &
Tone Gen
Programmable
AC Impedance
and Hybrid
Caller ID
Ringing
Generator
ADC
DAC
CODEC SLIC
Linefeed
Control
Linefeed
Monitor
DC-DC Controller
Line Diagnostics
PLL
PCLK
FSYNC
DRX
DTX
CS
SDI
SDO
SCLK
INT
RST
SPI
Control
Interface
PCM/
GCI
Interface
DSP
DTMF &
Tone Gen
Programmable
AC Impedance
and Hybrid
Caller ID
Ringing
Generator
ADC
DAC
CODEC
CODEC SLIC
Linefeed
Control
Linefeed
Monitor
DC-DC Controller
Line Diagnostics
PLL
PCLK
FSYNC
DRX
DTX
CS
SDI
SDO
SCLK
INT
RST
Si32170/1/6/7
ADC
DAC
Linefeed
FXS
RING
TIP
SPI
Interface
DSP
DTMF &
Tone Gen
Programmable
AC Impedance
and Hybrid
Caller ID
Ringing
Generator
ADC
DAC
CODEC SLIC
Linefeed
Control
Linefeed
Monitor
DC-DC Controller
Line Diagnostics
PLL
PSCLK
MISO
MOSI
Integrated
Serial
Interface
DSP
DTMF &
Tone Gen
Programmable
AC Impedance
and Hybrid
Caller ID
Ringing
Generator
ADC
DAC
CODEC
CODEC SLIC
Linefeed
Control
Linefeed
Monitor
DC-DC Controller
Line Diagnostics
PLL
Si32172/3/5
ADC
DAC
Linefeed
FXS
ProSLIC Copyright © 2012 by Silicon Laboratories 5.10.2013
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.
Si3217x-C
ProSLIC® Single-Chip FXS Solutions
Selected Electrical Specifications
Parameter Symbol Test Condition Min Typical Max Unit
Ambient Temperature TAF-Grade 025 70 °C
G-Grade –40 25 85 °C
Supply Voltage VDD 3.13 3.3 3.47 V
Battery Voltage, Si32171/2/5/6 VBAT –110 –95 –15 V
Battery Voltage, Si32171/3/7 VBAT –140 –130 –15 V
Maximum Loop Resistance (loop + load) RLOOP RDC,MAX = 430 , ILOOP = 18 mA,
VBAT = –52 V, RPROT = 0 ,
— — 2000
DC Differential Output Resistance RDO ILOOP < ILIM 160 —640
Idle Channel Noise C-Message weighted — 8 12 dBrnC
Psophometric weighted —–82 –78 dBmP
PSRR from VDD, VDDIO @ 3.3 V RX and TX, 200 Hz to 3.4 kHz —55 0dB
Longitudinal to Metallic/PCM Balance (for-
ward or reverse)
200 Hz to 1 kHz 58 60 —dB
1 kHz to 3.4 kHz 53 58 —dB
Metallic/PCM to Longitudinal Balance 200 Hz to 3.4 kHz 40 – — dB
Longitudinal Impedance 200 Hz to 3.4 kHz at TIP or RING —50 —
Longitudinal Current Capability Active off-hook 60 Hz
Reg 73 = 0x0B
—25 —mA
DC Feed Current Differential — — 45 mA
Common Mode — — 30 mA
Differential + Common Mode — — 45 mA
2-Wire Return Loss 200 Hz to 3.4 kHz 26 30 —dB
Transhybrid Balance 300 Hz to 3.4 kHz 26 30 —dB
Thermal Resistance (QFN-42) ΘJA —53 —
°C/WΘJB —33 —
ΘJC —39 —
Continuous Power Dissipation (QFN-42) PD TA = 85 °C —0.75 —W
Package Information
42-Pin QFN/LGA Package Diagram Dimensions
Dimension Min Nom Max
A 0.80 0.85 0.90
b 0.20 0.25 0.30
D 5.00 BSC
D2 3.35 3.40 3.45
e 0.50 BSC
E 7.00 BSC
E2 5.35 5.40 5.45
E3 1.65 1.70 1.75
E4 3.15 3.20 3.25
L 0.35 0.40 0.45
L1 0.05 0.10 0.15
aaa — — 0.10
bbb — — 0.10
ccc — — 0.08
ddd — — 0.10
