Si3228x Data Short
The Si3228x Dual ProSLIC® devices, in a single package, implement two complete
foreign exchange station (FXS) telephony interfaces. The Si3228x devices operate from
a 3.3 V supply and have standard PCM/SPI or 3-wire ISI digital interfaces. A pair of
built-in dc-dc converter controllers can be used to automatically generate the optimal
battery voltage required for each line-state, optimizing efficiency and minimizing heat
generation. The Si3228x devices are designed to operate with capacitive boost tracking
battery supply for lower power, cost, and footprint vs. other tracking or shared battery
supplies in the industry. Self-testing and metallic loop testing (MLT) is facilitated by
the built-in DSP, monitor ADC, and test load. The devices are available with wideband
audio for better than PSTN voice quality, DTMF detection, and Smart Ringing. Smart
Ringing reduces the peak current with 2-channel ringing for lower-cost ac-dc adapters.
The Si3228x devices are available in a 7 x 7 mm 48-pin QFN or 8 x 8 mm 56-pin QFN
package.
KEY FEATURES
• Two complete FXS channels in a single
7x7 or 8x8 mm package
• Performs all BORSCHT functions
• Ideal for short- or medium-loop
applications
• Ultra-low power consumption
• Patented low-power ringing
• Patent-pending Smart Ringing
• Reduces peak current with 2-channel
ringing
• Adaptive ringing
• Simplified configuration and diagnostics
• Supported by ProSLIC API
Applications:
• VoIP gateways and routers
• xDSL IADs
• Optical Network Terminals/Units (ONT/U)
• Analog Terminal Adapters (ATA)
• Cable eMTA
• Wireless Fixed Terminals (WFT)
• Wireless Local Loop (WLL)
• WiMAX CPE
• Private Branch Exchange (PBX)
• VoIP MDU gateways
• Audio diagnostics with loopback
• Integrated test load
• Wideband voice support
• On-hook transmission
• Loop or ground start operation
• Smooth polarity reversal
• Programmable interrupts
• Software-programmable parameters:
• Ringing frequency, amplitude, cadence,
and waveshape
• Two-wire ac impedance
PCLK / PSCLK
PLL
Ringing
Ringing
Generator
Generator
SLIC
ADC
ADC
Linefeed
Control
DAC
DAC
Linefeed
Monitor
CODEC
SLIC
Line Diagnostics
Diagnostics
Line
ADC
ADC
Linefeed
Control
DC-DC Controller
DAC
DAC
Linefeed
Monitor
DSP
Si3228x
Functional Block Diagram
Linefeed
Caller ID
CODEC
Linefeed
Host Interface
3-wire ISI
or
PCM/SPI
Interface
Programmable
Programmable
Impedance
ACACImpedance
andHybrid
Hybrid
and
• Transhybrid balance
DTMF
DTMFand
&
Tone Gen
Tone
Gen
TIP
Channel A
RING
TIP
Channel B
RING
• DC current loop feed (10–45 mA)
• Loop closure and ring trip thresholds
• Ground key detect threshold
• Flexible integrated tracking DC-DC
controller supporting patent-pending lowcost capacitive boost configuration
• DTMF Generation
• DTMF Detection (Si32281/3/5/7)
• 3-wire Integrated Serial Interface (ISI) or
PCM interface
• A-Law/µ-Law companding, linear PCM
• Pulse metering
• 3.3 V operation
• Pb-free/RoHS-compliant packaging
1
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
Rev. 0.5 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • December 6, 2021
1
Si3228x Data Short •
Table 1.1. Si3228x Ordering Guide
P/N
Description
Package Type
Max VBAT
Temperature
Si32280-A-FM
Wideband Dual FXS, ISI interface
QFN482
–106 V
0 to 70 °C
Si32280-A-GM
Wideband Dual FXS, ISI interface
QFN482
–106 V
–40 to 85 °C
Si32281-A-FM
Wideband Dual FXS, ISI interface, DTMF
detection
QFN482
–106 V
0 to 70 °C
Si32281-A-GM
Wideband Dual FXS, ISI interface, DTMF
detection
QFN482
–106 V
–40 to 85 °C
Si32282-A-FM
Wideband Dual FXS, PCM interface, daisy-chain mode
QFN562
–106 V
0 to 70 °C
Si32282-A-GM
Wideband Dual FXS, PCM interface, daisy-chain mode
QFN562
–106 V
–40 to 85 °C
Si32283-A-FM
Wideband Dual FXS, PCM interface,
DTMF detection, daisy-chain mode
QFN562
–106 V
0 to 70 °C
Si32283-A-GM
Wideband Dual FXS, PCM interface,
DTMF detection, daisy-chain mode
QFN562
–106 V
–40 to 85 °C
Si32284-A-FM
Wideband Dual FXS, ISI interface, Smart
Ringing
QFN482
–106 V
0 to 70 °C
Si32284-A-GM
Wideband Dual FXS, ISI interface, Smart
Ringing
QFN482
–106 V
–40 to 85 °C
Si32285-A-FM
Wideband Dual FXS, ISI interface, DTMF
detection, Smart Ringing
QFN482
–106 V
0 to 70 °C
Si32285-A-GM
Wideband Dual FXS, ISI interface, DTMF
detection, Smart Ringing
QFN482
–106 V
–40 to 85 °C
Si32286-A-FM
Wideband Dual FXS, PCM interface, daisy-chain mode, Smart Ringing
QFN562
–106 V
0 to 70 °C
Si32286-A-GM
Wideband Dual FXS, PCM interface, daisy-chain mode, Smart Ringing
QFN562
–106 V
–40 to 85 °C
Si32287-A-FM
Wideband Dual FXS, PCM interface,
DTMF detection, daisy-chain mode,
Smart Ringing
QFN562
–106 V
0 to 70 °C
Si32287-A-GM
Wideband Dual FXS, PCM interface,
DTMF detection, daisy-chain mode,
Smart Ringing
QFN562
–106 V
–40 to 85 °C
Note:
1. Adding the suffix "R" to the part number (e.g., Si32282-C-FMR) denotes tape and reel.
2. QFN - Quad-Flat No-leads
2
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
Rev. 0.5 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • December 6, 2021
2
Si3228x Data Short
Copyright © 2021 Skyworks Solutions, Inc. All Rights Reserved.
Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained
herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for
errors or omissions in these materials or the information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions
at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities,
or other difficulties arising from any future changes.
No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials,
products or information provided hereunder, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in
Skyworks’ Terms and Conditions of Sale.
THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR
OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY
INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR
COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE
FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING
WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE
RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead
to personal injury, death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and
agree to fully indemnify Skyworks for any damages resulting from such improper use or sale.
Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors,
or operation of products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other
risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of
Skyworks’ published specifications or parameters.
Skyworks, the Skyworks symbol, Sky5®, SkyOne®, SkyBlue™, Skyworks Green™, Clockbuilder®, DSPLL®, ISOmodem®, ProSLIC®, and SiPHY® are trademarks or
registered trademarks of Skyworks Solutions, Inc. or its subsidiaries in the United States and other countries. Third-party brands and names are for identification purposes
only and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by
reference.
3
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
Rev. 0.5 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • December 6, 2021
3