SI3220-GQ - Dual SLIC/CODEC 64-TQFP | Skyworks Solutions
MPN： SI3220-GQ ✗ 停產SI3220-GQ 概覽
A Subscriber Line Interface Concept, or SLIC, is the analog front end of a telephone line. It replaces discrete circuits for line sensing, ring detection, codec control, voice conversion, and subscriber-line supervision. The SI3220-GQ combines SLIC and codec functions, placing two complete channel interfaces within the wider category of telecom interface ICs, communication semiconductors, and integrated voice-access systems.
The device performs the BORSCHT functions required for analog telephone-line operation: battery feed, overvoltage protection, ring supervision, codec signaling, hybrid control, and test access. Its internal balanced ringing reaches 65 Vrms, removing the need for a separate external balanced-ringer circuit in supported designs. Internal diagnostics provide line-condition information that can simplify fault detection and subscriber-line testing.
The SI3220-GQ accepts GCI, PCM, and SPI interfaces, allowing it to connect with a digital communications processor or other voice-processing controller. These digital interfaces place the device between the analog subscriber line and the system’s PCM processing fabric. Its low-voltage CMOS implementation supports both 3.3 V and 5 V environments, while low standby power is important in continuously connected voice-access equipment.
Typical uses include two-channel voice cards, digital PBX line cards, Voice over IP terminal adapters, analog telephone interfaces, central-office equipment, and other subscriber-line access systems. It is particularly suitable when both phone lines and voice-codec functions must fit into a compact 10 mm by 10 mm package without separate ringing generation.
Designers should preserve adequate line-driver and ringing margins, follow the manufacturer’s external component and layout guidance, and validate the complete telephone interface against the intended application. The 941 mW listed power value and 65 mA supply current require attention to supply routing, thermal performance, and bypass-capacitor placement during multi-channel board design.
This product data combines the SI3220-GQ’s channel configuration, interface types, power characteristics, ringing capability, package details, and verified ordering alternatives with engineering guidance for telecom line-card implementation. It also distinguishes confirmed package-compatible options from replacements that would require functional and board-level requalification.
直接替換替代品，適用於 SI3220-GQ — 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。
SI3220-G-GQ
✅ 直接替換📋 參考替代品（不在目錄中）
SI3220-G-FQ
✅ 直接替換📋 參考替代品（不在目錄中）
SI3220-GQ 規格
| Device Type | Dual-channel SLIC/codec telecom interface IC |
| Number of Circuits | 2 channels |
| Digital Interfaces | GCI, PCM, and SPI |
| 供應電壓 | 3.3 V and 5 V |
| 供應電流 | 65 mA |
| Power Dissipation | 941 mW |
| 工作溫度 | -40 °C to 85 °C |
| 封裝 | 64-TQFP, 10 mm x 10 mm |
| 腳位數 | 64 pins |
| Balanced Ringing Voltage | 65 Vrms |
| Maximum Line Length | 18 kft |
| Line Functions | BORSCHT functions |
| Ringing Architecture | Internal balanced ringing |
| Diagnostics | Internal line diagnostics |
| Low-Voltage Process | CMOS |
| Lead-Free Status | Lead-free |
| 安裝類型 | Surface mount |
SI3220-GQ 64-tqfp, 10 mm x 10 mm 腳位配置指南
SI3220-GQ（64-tqfp, 10 mm x 10 mm 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-GQ.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI3220-GQ 適用於 6 應用s: Digital PBX Line Cards, Voice over IP Terminal Adapters, Analog Telephone Interfaces, Central Office Voice Access, Voice Processing Gateways, Industrial Telephone Monitoring Equipment.
Digital PBX Line Cards
The SI3220-GQ is appropriate for a two-channel digital PBX line card because it integrates two SLIC/codec channels, BORSCHT line functions, internal diagnostics, and GCI, PCM, or SPI host connectivity. Its 65 Vrms balanced-ringing capability can reduce the external line-driver burden compared with a discrete ringing implementation. The 64-TQFP package also preserves routing flexibility on a dense line card. During design, verify the manufacturer’s external protection-network requirements, validate ringing and off-hook behavior in the intended impedance environment, and budget the listed 65 mA supply current with both channels active.
Voice over IP Terminal Adapters
A Voice over IP terminal adapter can use the SI3220-GQ to convert two analog telephone lines into digital voice data. The GCI, PCM, and SPI interfaces support connection with voice-processing controllers, while the integrated codec reduces the need for separate signaling and conversion circuitry. Internal balanced ringing up to 65 Vrms supports local ring generation for connected analog handsets. Because ringing generation and telephone-line supervision can affect EMI and surge robustness, follow the manufacturer’s isolation, protection, and reference-circuit guidance. Confirm host-driver compatibility and validate both line channels before production deployment.
Analog Telephone Interfaces
The SI3220-GQ fits equipment requiring two wired analog telephone interfaces with integrated voice processing. Its low-voltage CMOS design supports 3.3 V and 5 V systems, and the internal diagnostics provide line-state information that can assist fault reporting and maintenance. The device is suitable for voice terminals, small office systems, and embedded analog-phone adapters. Designers should account for the 941 mW listed power value, provide correct supply bypassing, and use the application schematic to select protection and impedance-matching components. The 10 mm by 10 mm TQFP footprint supports compact assemblies without requiring a separate codec package.
Central Office Voice Access
The SI3220-GQ can support two-channel subscriber-line access in central-office and access-node equipment where controlled ringing, line supervision, and codec integration are required. The manufacturer identifies the device as suitable for lines extending to 18 kft and includes BORSCHT functions and internal balanced ringing to 65 Vrms. These characteristics can simplify the analog termination compared with separate line-interface circuitry. In a central-office design, thermal and power planning must include the 65 mA supply rating and 941 mW listed dissipation. Qualification should cover worst-case line conditions, ringing cadence, fault recovery, and system-level electromagnetic behavior.
Voice Processing Gateways
The SI3220-GQ is useful in voice gateways that combine legacy analog lines with a digital media processor. Its PCM interface provides a direct path for voice traffic, while GCI and SPI options support system integration and control. Two integrated channels can reduce component count in gateways intended for small offices, branch sites, or legacy equipment adapters. The implementation must ensure that the host processor and SI3220-GQ use compatible signaling, clocking, and framing conventions. Use the manufacturer reference design and configuration guidance to determine required external components. Testing should include on-hook noise, ring-voltage tolerance, line-feed behavior, and loss of synchronization.
Industrial Telephone Monitoring Equipment
The SI3220-GQ can support industrial telephone-line monitoring systems that require two remote subscriber-line interfaces, voice capture, and diagnostic status. Internal line diagnostics may simplify fault detection, while the integrated codec supports direct transfer of voice information to a controller. The 3.3 V and 5 V supply compatibility allows deployment in industrial electronic platforms designed around either logic level. The industrial environment still requires careful attention to surge protection, isolation strategy, thermal rise, and enclosure-related EMI coupling. Validate the completed interface against the target line length and the 18 kft application limit stated in the manufacturer documentation.
工程參考資料，適用於 SI3220-GQ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | SI3220-G-GQ | SI3220-G-FQ |
|---|---|---|---|
| Brand | Skyworks Solutions Inc. | Skyworks Solutions Inc. | Skyworks Solutions Inc. |
| Package | 64-TQFP (10 mm x 10 mm) | 64-TQFP (10 mm x 10 mm) | 64-TQFP (10 mm x 10 mm) |
| Device Type | Dual-channel SLIC/codec | Dual-channel SLIC/codec | Dual-channel SLIC/codec |
| Number of Circuits | 2 channels | 2 channels | 2 channels |
| Digital Interfaces | GCI, PCM, and SPI | GCI, PCM, and SPI | GCI, PCM, and SPI |
| Supply Voltage | 3.3 V and 5 V | 3.3 V and 5 V | 3.3 V and 5 V |
| Balanced Ringing Voltage | 65 Vrms | 65 Vrms | 65 Vrms |
主要差異化特點
- Two complete subscriber-line channels in one package (對比Single-channel SLIC or codec devices)
- Integrated balanced ringing generator (對比Discrete external balanced-ringer implementations)
- Multiple host-interface choices (對比Interface-limited SLIC options)
設計說明
Follow the manufacturer application schematic for the SI3220-GQ’s external line network, protection components, supply decoupling, and exposed-pad connection. Place input and output bypass capacitors close to their associated pins, route high-voltage ringing and line-driver currents away from sensitive host-interface traces, and provide a continuous ground reference beneath the TQFP. Confirm the land pattern against the exact 64-TQFP mechanical drawing rather than relying only on the generic 64-pin TQFP footprint.
Estimated: using the listed 941 mW device power and a board-level junction-to-ambient thermal resistance of 30 °C/W, the expected junction-temperature rise is approximately 28.2 °C above ambient. At 55 °C ambient, that estimate gives an 83.2 °C junction temperature. This is an engineering estimate rather than a manufacturer guarantee, so use the actual PCB thermal model, copper area, ambient range, and neighboring heat sources to determine the final margin.
Do not treat a shared 64-TQFP package as sufficient proof of drop-in interchangeability. Before substituting an SI3220 ordering code, compare the complete pin-description table, supply limits, ringing configuration, diagnostic registers, clocking requirements, temperature grade, and host-driver configuration. Pay particular attention to startup and shutdown behavior because a ringing or line-driver circuit can remain active during board power transitions.
The SI3220-GQ generates internal balanced ringing up to 65 Vrms, so board-level EMI can be affected by line-network layout and the transition between on-hook and ringing states. Keep the line interface physically separated from digital audio and processor domains, minimize loop area around high-voltage paths, and use the manufacturer’s recommended protection and filtering values. Validate conducted and radiated emissions with the final telephone line, cable, enclosure, and grounding configuration.
合規資訊
The manufacturer-related listings identify the SI3220-GQ as lead-free. RoHS, REACH, halogen-free status, and conflict-minerals compliance are not stated in the available product information.
