SI3220-KQ - Dual-Channel SLIC/Codec | Skyworks Solutions
MPN： SI3220-KQ ✗ 停產SI3220-KQ 概覽
A SLIC is the analog front end used to connect a subscriber telephone line to a digital communications system. By integrating the SLIC, codec, line-driver circuitry, ringing generation, and diagnostics, the SI3220-KQ reduces the component count required for dual-channel analog telephone equipment. In the component hierarchy, it is a telecom interface IC, a line-management IC, and a programmable CMOS SLIC/codec.
The device performs the BORSCHT line functions and is identified for applications supporting lines up to 18 kft. Its interfaces support GCI, PCM, and SPI connectivity, allowing it to operate within digital line-card or voice-processing architectures. The internal balanced ringer reaches 65 Vrms, while internal diagnostics support board-level testing of the telephone interface. Its 65 mA supply-current rating and 941 mW listed power figure should be checked against the final rail topology and operating loads.
The SI3220/Si3225 family uses programmable low-voltage CMOS circuitry to combine subscriber-line interface and codec functions in accordance with LSSGR, ITU, and ETSI specifications. This integration can simplify the voice path, reduce external glue logic, and shorten development time for dual-channel analog telephone adapters, voice-over-IP terminal equipment, and embedded voice gateways.
Typical uses include dual-channel voice gateways, analog telephone line adapters, digital PBX line cards, embedded voice servers, and telecom access equipment. The SI3220-KQ is particularly relevant when one board must support two subscriber lines and when internal ringing and diagnostics can reduce external circuitry.
Design carefully around the 64-pin TQFP footprint, exposed analog supply connections, line-interface protection, and the high-voltage ringing path. Use the manufacturer reference design and datasheet application circuit for component values and layout because line-interface networks and protection arrangements are tightly coupled to PCB routing and creepage requirements.
This product record combines the part-specific electrical data, package information, interface options, application guidance, and engineering trade-offs needed to evaluate the SI3220-KQ for a dual-channel analog telephone design.
直接替換替代品，適用於 SI3220-KQ — 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-KQ 規格
| Product Type | Dual-channel Subscriber Line Interface Concept and codec IC |
| Number of Channels | 2 channels |
| Interface Types | GCI, PCM, and SPI |
| Supply Voltage Options | 3.3 V and 5 V |
| 供應電流 | 65 mA |
| Power Dissipation | 941 mW |
| 工作溫度 | 0°C to 70°C |
| Internal Balanced Ringing | 65 Vrms |
| Maximum Supported Line Length | 18 kft |
| Telephone Line Functions | BORSCHT functions |
| Diagnostic Capability | Internal diagnostics |
| Process Technology | Low-voltage CMOS |
| 封裝 | 64-pin TQFP, 10 mm x 10 mm |
| 安裝類型 | Surface mount |
| Lead-Free Status | Contains lead |
SI3220-KQ 64-pin tqfp, 10 mm x 10 mm 腳位配置指南
SI3220-KQ（64-pin 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-KQ.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI3220-KQ 適用於 6 應用s: Dual-Channel VoIP Gateway, Embedded Voice Terminal, Digital PBX Line Card, Analog Telephone Adapter, Telecom Access Equipment, Voice-Over-Ethernet Gateway.
Dual-Channel VoIP Gateway
The SI3220-KQ fits a dual-channel VoIP gateway that must terminate two analog subscriber lines and pass voice traffic to a digital processor. Its two integrated SLIC channels and codec functions reduce the number of separate line-interface devices, while GCI, PCM, and SPI connectivity provides selectable system integration paths. Internal balanced ringing up to 65 Vrms supports line-signaling requirements without an external bulk-ringer circuit. The 64-pin TQFP also keeps the two-channel function in one surface-mount device. Designers should verify the gateway's sampling clock, digital interface mode, line-network components, protection strategy, and country-specific line requirements against the manufacturer datasheet before releasing the PCB.
推薦
Embedded Voice Terminal
The SI3220-KQ is appropriate for an embedded voice terminal that provides two analog telephone connections while using host electronics for call processing. Integrating the SLIC and codec reduces analog front-end complexity and supports digital connection through GCI, PCM, or SPI. The internal diagnostics can help production testing identify line-interface faults, and internal balanced ringing up to 65 Vrms supports normal telephone signaling. Because the device is obsolete, an embedded-terminal manufacturer should secure documented remaining inventory or validate a current-generation alternative before committing to a new platform. Firmware and hardware revisions should also preserve the expected line-network response and ring-detection timing.
推薦
Digital PBX Line Card
A digital PBX line card can use the SI3220-KQ to add two analog subscriber-line interfaces in a compact 64-pin TQFP footprint. The integrated codec reduces the number of external voice-conversion blocks, while GCI and PCM interfaces suit systems that organize voice traffic around a digital line controller. Support for lines up to 18 kft makes the device relevant for access-card designs, subject to the actual loop length, impedance, protection, and test requirements. Internal diagnostics are valuable during manufacturing and field maintenance. Because this product is identified as obsolete, any new PBX platform should request lifecycle confirmation and consider a supported migration path rather than relying on long-term availability.
推薦
Analog Telephone Adapter
The SI3220-KQ supports a two-port analog telephone adapter where existing phones or fax equipment must connect to a digital voice platform. Its dual-channel architecture provides two complete SLIC paths, and the integrated codec reduces the number of components required between the line interface and voice processor. Internal balanced ringing up to 65 Vrms and internal diagnostics assist both normal operation and production testing. The designer must still implement the external line network, overvoltage protection, hook-state detection interface, and regulatory isolation or protection requirements. For a new commercial product, the obsolete lifecycle status makes a supported current-generation SLIC/codec generally more appropriate than introducing SI3220-KQ without a firm end-of-life plan.
推薦
Telecom Access Equipment
The SI3220-KQ is relevant to dual-line telecom access equipment requiring an integrated SLIC, codec, ringing generator, and diagnostic function. Its 3.3 V or 5 V supply options and low-voltage CMOS implementation can simplify partitioning within a mixed-signal access board. The 64-pin TQFP package supports compact routing but requires careful treatment of high-voltage ringing energy, sensitive line signals, digital interfaces, and supply returns. Follow the manufacturer's reference layout for component placement and keep line-network connections isolated from sensitive routing. Because the exact ordering code is obsolete, a new access-equipment design should obtain a documented transition recommendation and assess total lifecycle risk before committing production volumes.
推薦
Voice-Over-Ethernet Gateway
A voice-over-Ethernet gateway can use the SI3220-KQ when it must bridge two PSTN lines to packetized voice. The integrated codec provides a direct path from the analog subscriber-line interface into digital processing, while selectable GCI, PCM, or SPI connectivity supports different gateway architectures. Internal ringing up to 65 Vrms reduces external ringer complexity, and internal diagnostics can improve production fault isolation. The implementation must account for echo-cancellation processing, codec timing, line impedance, ringing cadence, surge protection, and regulatory approvals. Since the SI3220-KQ is obsolete, engineers should validate any alternative at the electrical, firmware, mechanical, and compliance levels rather than assuming another dual-channel SLIC is interchangeable.
推薦
推薦產品摘要
工程參考資料，適用於 SI3220-KQ — 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 |
|---|---|
| Brand | Skyworks Solutions Inc. |
| Package | 64-pin TQFP, 10 mm x 10 mm |
| Channel Count | 2 channels |
| Interface Types | GCI, PCM, and SPI |
| Supply Voltage | 3.3 V and 5 V |
| Supply Current | 65 mA |
| Power | 941 mW |
| Operating Temperature | 0°C to 70°C |
| Ringing Implementation | Internal balanced ringing up to 65 Vrms |
| Maximum Supported Line Length | 18 kft |
| Telephone Functions | BORSCHT functions |
| Diagnostics | Internal diagnostics |
主要差異化特點
- Two complete subscriber-line channels in one package (對比A discrete SLIC and codec implementation)
- Internal high-voltage ringing capability (對比An external bulk-ringer implementation)
- Broad digital connectivity for telephone equipment (對比A codec supporting only one digital host interface)
設計說明
Use the manufacturer reference layout to separate the internal 65 Vrms ringing path from sensitive audio and digital routes. Keep the line-network and protection components close to the relevant SI3220-KQ pins, maintain the documented ground-return arrangement, and avoid routing high-energy ringing traces beneath isolation boundaries or long parallel digital runs. The 64-pin TQFP footprint provides fine-pitch access, so assembly inspection should verify pin alignment and solder-joint quality on every lead.
Evaluate the SI3220-KQ across both documented 3.3 V and 5 V operating approaches rather than assuming either voltage is interchangeable without a full digital-interface review. Include line-driver, codec, ringing, and peripheral loads when checking the 65 mA supply-current figure and 941 mW power entry. Estimated dissipation equals rail voltage multiplied by measured average supply current, but the final design should also consider startup behavior, ringing intervals, supply tolerance, and the voltage-headroom requirements of the selected architecture.
Do not treat the SI3225 family member as a drop-in replacement merely because both devices use a 64-pin TQFP. The SI3220 provides internal balanced ringing up to 65 Vrms, while the SI3225 is associated with external bulk-ringer support, which can change component count, routing, and protection requirements. Also avoid assuming that the obsolete ordering code is lead-free: its listing states that its lead-free status contains lead. Confirm RoHS, REACH, and material declarations for the exact lot before production release.
合規資訊
The SI3220-KQ listing states that its lead-free status contains lead. RoHS, REACH, halogen-free, and conflict-minerals information is not established for the exact ordering code. AEC-Q100 is treated as not applicable to the identified 0°C to 70°C commercial-temperature product.
