SI3220-BQ Dual ProSLIC 3.3V/5V 64-TQFP | Silicon Labs
MPN： SI3220-BQ ✗ 停產SI3220-BQ 概覽
A ProSLIC is a programmable subscriber-line interface circuit that consolidates multiple functions of a traditional analog telephone linecard. The SI3220 combines the SLIC, codec, and digital interface sections into one low-voltage CMOS device, while the companion Si3200 linefeed interface performs the external high-voltage functions. This division keeps high-voltage isolation and protection circuitry separate from the low-voltage signal-processing section.
Key features include dual-channel operation, all BORSCHT functions, internal balanced ringing to 65 Vrms, low standby consumption, and support for applications up to 18 kft. The programmable digital interface can use standard PCM, SPI, or GCI connections, allowing the device to fit voice gateways, linecards, voice-over-packet systems, and digital PBX platforms. The 3.3 V and 5 V supply options provide flexibility across different linecard architectures.
Internally, the SI3220 handles the low-voltage codec, line-driver, and digital control functions required by a dual analog channel. PCM or SPI connectivity carries voice and control traffic between the ProSLIC and host equipment, while GCI provides an alternative digital interface format. The companion Si3200 supplies the high-voltage linefeed path, including the external components needed to support ringing and telephone-line operation.
Typical uses include two-channel analog telephone interfaces, broadband voice gateways, PBX linecards, Voice over Ethernet endpoints, digital loopback systems, and embedded voice adapters. For a new two-channel design, the SI3220-BQ is most suitable when the board architecture separates low-voltage codec and SLIC processing from high-voltage linefeed circuitry through Si3200 or Si3202 devices.
The primary design consideration is the division between low-voltage and high-voltage sections. Maintain the isolation and creepage requirements of the telephone-line interface, place protection components near the line connectors, and validate the complete linecard against the applicable linefeed network and ringing requirements rather than relying on the SI3220 alone.
This product data connects the SI3220-BQ specifications with compatible companion silicon, interface requirements, and design considerations, helping engineers identify the correct roles for the ProSLIC, linefeed interface, digital host interface, and external protection network.
直接替換替代品，適用於 SI3220-BQ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品SI3220-BQ 規格
| Product Type | Dual ProSLIC SLIC/codec integrated circuit |
| Number of Circuits | 2 circuits |
| Digital Interface | PCM, SPI, or GCI |
| 供應電壓 | 3.3 V or 5 V |
| 供應電流 | 65 mA |
| Power Dissipation | 941 mW |
| 工作溫度 | -40 °C to +85 °C |
| Balanced Ringing | 65 Vrms internal |
| Maximum Line Length | 18 kft application support |
| Telephone Functions | All BORSCHT functions |
| Process Technology | Low-voltage CMOS |
| Integrated Functions | Dual SLIC and codec |
| 封裝 | 64-pin TQFP |
| 安裝類型 | Surface mount |
| Linefeed Companion | Si3200 or Si3202 high-voltage linefeed interface |
| Lead-Free Status | Contains lead |
SI3220-BQ 64-pin tqfp 腳位配置指南
SI3220-BQ（64-pin tqfp 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： SI3220-BQ.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI3220-BQ 適用於 6 應用s: Two-Channel PBX Linecard, Voice over IP Gateway, Analog Phone Interface Adapter, Digital PBX Endpoint, Telephone Line Test Equipment, Legacy Voice Equipment Bridge.
Two-Channel PBX Linecard
The SI3220-BQ supports two analog telephone channels on one linecard while providing PCM, SPI, or GCI connectivity to the central digital controller. Its integrated SLIC and codec functions reduce the number of separate low-voltage interface devices required for each channel. Internal balanced ringing to 65 Vrms and support for line lengths up to 18 kft make the device suitable for enterprise PBX linecards that must terminate conventional analog phones, fax machines, or other loop-powered terminals. The Si3200 companion provides the high-voltage linefeed path, while the board must also include suitable isolation, surge protection, and connector interface components.
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Voice over IP Gateway
The SI3220-BQ bridges two conventional analog telephone lines to a digital Voice over IP gateway through its configurable PCM, SPI, or GCI interface. Its dual-channel architecture allows one IC to serve both line endpoints, while the integrated codec and SLIC functions simplify the signal path. The 3.3 V or 5 V supply choice supports different gateway platforms, and the listed 65 mA supply current helps partition low-voltage power budgets. External linefeed and protection circuits remain essential because the SI3220 is the low-voltage programmable interface rather than a complete high-voltage telephone protection solution.
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Analog Phone Interface Adapter
The SI3220-BQ can create a compact two-channel analog telephone interface for industrial control cabinets, voice recorders, test systems, and legacy equipment adapters. By integrating both SLIC and codec functions, it reduces the number of components connected to each analog line. The device supports PCM, SPI, and GCI host connections, so designers can match the digital interface already used by the controller. The 64-pin TQFP package supports compact surface-mount construction, while the companion Si3200 handles the high-voltage functions and the board must provide compliant line protection.
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Digital PBX Endpoint
The SI3220-BQ is appropriate for a two-line endpoint card in a digital PBX, where analog desk phones or fax equipment must be connected to a digital switching system. Its dual SLIC/codec channels support two subscriber lines, and the selectable PCM, SPI, or GCI interface allows integration with different host processors. Internal balanced ringing to 65 Vrms and all BORSCHT functions support practical line supervision and ringing requirements. The Si3200 handles the high-voltage linefeed functions, allowing the low-voltage ProSLIC to remain separated from the protected telephone-network side of the board.
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Telephone Line Test Equipment
The SI3220-BQ can serve as the dual-channel interface in bench and production equipment intended to emulate, terminate, or analyze analog subscriber lines. The integrated codec and SLIC functions provide a compact way to connect test channels to a PCM, SPI, or GCI controller, while the internal 65 Vrms balanced ringing capability supports line-state testing. Its specified -40 °C to +85 °C range is suitable for industrial test environments when the complete assembly is thermally qualified. High-voltage protection, isolation, and linefeed implementation must follow the manufacturer reference design.
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Legacy Voice Equipment Bridge
The SI3220-BQ enables a bridge between legacy analog voice terminals and modern digital electronics in industrial, transportation, and communications equipment. Two integrated SLIC/codec channels can handle multiple analog lines, while the host can use the interface format best suited to its control architecture. Operating from 3.3 V or 5 V provides compatibility with both legacy and newer digital voltage domains. The design should reserve the Si3200 interface and associated protection network because accurate line operation, ringing, and surge immunity depend on the complete high-voltage interface design.
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推薦產品摘要
工程參考資料，適用於 SI3220-BQ — 比較、設計指引及合規資訊。
選型指南
設計說明
Design the low-voltage supply around the supported 3.3 V or 5 V operating condition. The SI3220-BQ specification lists 65 mA supply current and 941 mW power dissipation, but the actual operating point depends on supply voltage, interface activity, channel state, and temperature. Provide local bypass capacitance according to the manufacturer reference design and keep the high-voltage linefeed currents separate from sensitive codec and digital supply paths.
Separate the SI3220-BQ low-voltage signal section from the high-voltage telephone-line section and preserve the isolation geometry specified by the reference design. Route the line-side conductors away from PCM, SPI, GCI, clock, and sensitive analog traces. The Si3200 companion and protection components should be placed so surge currents do not pass through the digital or audio ground areas of the SI3220-BQ.
Do not treat the SI3225 as a drop-in replacement merely because both parts are dual ProSLIC devices. The SI3220 supports internal balanced ringing to 65 Vrms, whereas the SI3225 uses external bulk-ringer support, so the external networks and board requirements can differ. Likewise, the Si3200 and Si3202 have distinct linefeed functions; select and validate the companion according to the exact reference design rather than by family name.
合規資訊
The SI3220-BQ listing states “Lead Free Status: Contains.” RoHS, REACH, halogen-free, AEC-Q100, and conflict-minerals declarations were not established.