SI3216-FT 1-Channel SLIC Codec, 38-TSSOP | Silicon Labs
MPN： SI3216-FT ✓ 啟用中SI3216-FT 概覽
An SLIC is an analog telephone-line interface that provides the bridge between a conventional subscriber line and digital switching equipment. The integrated codec portion converts voice signals into digital PCM data, while the SLIC circuitry handles line-facing functions. The SI3216-FT belongs to the interface IC category, where signal conditioning, line-interface control, and voice encoding must operate together within strict supply and board-space constraints.
The principal features include one SLIC channel, 16-bit voice sampling at 16 kHz, and support for GCI, PCM, and SPI control paths. These interfaces provide options for connecting the device to digital switching, channel-bank, or host-control circuitry. The 3.13 V minimum operating voltage permits integration with systems operating below the traditional 5 V supply level, while the 5.25 V maximum supports legacy 5 V infrastructure.
The SI3216-FT combines narrowband and wideband voice support in one device. Narrowband operation reaches 3.4 kHz, while wideband operation extends to 7 kHz, allowing the same design framework to support conventional voice and higher-fidelity speech. The 38-TSSOP package provides a surface-mount form factor for compact telecommunications equipment, although its relatively long body requires careful PCB layout and adequate pin clearance.
Typical uses include voice-over-IP terminals, subscriber-line access equipment, digital loop carriers, voice gateways, and fixed-line analog adapters. In these systems, the codec generates digital voice samples while the SLIC interface connects to an analog telephone line. The supported 16-bit, 16 kHz format can also simplify synchronization with compatible PCM processing paths.
Designers should account for the 700 mW listed power dissipation and provide stable, low-noise supply rails around the 3.13 V to 5.25 V operating range. Place decoupling capacitors close to the supply pins and maintain the recommended layout around analog, digital, and line-interface circuitry. Confirm external line-network components, protection requirements, clocking, and interface levels against the manufacturer datasheet before production release.
This page combines the core electrical specifications, interface choices, application guidance, and verified same-footprint alternatives for the SI3216-FT. It also highlights the distinction between electrically similar options so that replacement decisions can be based on package compatibility, supply operation, temperature grade, interface behavior, and documented performance rather than part-number similarity alone.
直接替換替代品，適用於 SI3216-FT — 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。
此系列的變體
與下列產品可直接替換的同系列型號： SI3216-FT （相同外形與佔位） — 差異在於 Product Type.
SI3216-KT
✅ 直接替換聯絡詢價
查看資料表 →SI3216-C-FT
✅ 直接替換📋 參考替代品（不在目錄中）
SI3216-FT 規格
| Product Type | Subscriber Line Interface Concept (SLIC) and codec |
| Number of Circuits | 1 channel |
| 介面 | GCI, PCM, and SPI |
| 工作電源電壓 | 3.13 V to 5.25 V |
| 供應電流 | 88 mA |
| Power Dissipation | 700 mW |
| 工作溫度 | 0 °C to 70 °C |
| Voice Sampling Resolution | 16 bit |
| Voice Sampling Rate | 16 kHz |
| Wideband Audio Bandwidth | 7 kHz |
| Narrowband Audio Bandwidth | 3.4 kHz |
| 封裝 | 38-pin TSSOP |
| 安裝類型 | Surface mount |
SI3216-FT 38-pin tssop 腳位配置指南
SI3216-FT（38-pin tssop 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： SI3216-FT.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI3216-FT 適用於 6 應用s: Voice-over-IP Terminal, Digital Loop Carrier, Analog Telephone Adapter, Voice Gateway, Small Business PBX, VoIP Fax and Data Terminal.
Voice-over-IP Terminal
The SI3216-FT fits a voice-over-IP terminal that combines an analog telephone line with digital voice processing. Its single SLIC channel handles the line-facing side, while the integrated codec supports 16-bit voice samples at 16 kHz. The GCI, PCM, and SPI interfaces allow the designer to connect the codec to the terminal's selected digital processing architecture without changing the line-interface subsystem. Wideband operation extends to 7 kHz, while narrowband operation reaches 3.4 kHz, supporting conventional and enhanced speech in the same platform. Its 3.13 V to 5.25 V supply range is useful for compact equipment built around both lower-voltage and 5 V digital rails. Designers should follow the manufacturer reference circuit for line-network components, protection, grounding, and interface timing.
推薦
Digital Loop Carrier
The SI3216-FT can serve as the line-side codec in a digital loop carrier carrying subscriber voice over digital infrastructure. Its one-channel architecture suits designs that allocate one SLIC per subscriber line, while the PCM and GCI interfaces provide paths to channel-bank or switching hardware. Voice data is represented with 16-bit samples at 16 kHz, and the device supports both narrowband operation to 3.4 kHz and wideband operation to 7 kHz. The 38-pin TSSOP package supports surface-mount assembly but requires adequate spacing around the long package body. Because each line consumes approximately 88 mA with a listed dissipation of 700 mW, multi-channel equipment should consider aggregate supply capacity, thermal distribution, and startup sequencing.
推薦
Analog Telephone Adapter
The SI3216-FT is appropriate for an analog telephone adapter that connects a traditional subscriber line to packet or digital voice services. The integrated SLIC handles the line-facing interface, while the codec produces digital voice data for the adapter's network processor. Support for GCI, PCM, and SPI provides flexibility across controller arrangements, and the 16-bit, 16 kHz voice format provides a defined digital representation for downstream packetization. The 3.13 V minimum operating voltage suits compact systems that cannot accommodate a strictly 5 V codec supply. Designers must still implement the approved line-network network, surge protection, ringing interface, and isolation requirements. The 0 °C to 70 °C operating range suits indoor commercial equipment rather than unc temperature-controlled enclosures.
推薦
Voice Gateway
A voice gateway benefits from the SI3216-FT when each analog trunk or subscriber port requires a dedicated SLIC and codec. The device combines one telephone-line interface with GCI, PCM, and SPI connectivity, giving the system designer options for connecting to switching silicon, channel converters, or a host controller. Its support for narrowband audio to 3.4 kHz and wideband audio to 7 kHz allows the gateway to support standard voice services and enhanced speech where the line and network permit it. The 38-pin TSSOP package is suitable for high-density surface-mount boards, although pin escape and thermal spreading need careful planning. Use the manufacturer application circuit to establish analog and digital grounding, line-network component values, clocking, and interface signal levels.
推薦
Small Business PBX
The SI3216-FT can support analog extension or trunk ports in a small-business PBX when the system requires one SLIC per line. Its codec generates 16-bit voice samples at 16 kHz, and the PCM, GCI, and SPI interfaces provide multiple paths for connecting to the PBX's switching and control electronics. Supporting both narrowband and wideband voice allows a product family to offer differentiated speech quality without changing the line-interface package. The 3.13 V to 5.25 V operating range supports common PBX power architectures, while the 38-pin TSSOP permits surface-mount assembly on dense line cards. Thermal design should account for the listed 700 mW dissipation per device and the total demand created by multiple channels. Protection and line-network implementation must follow the manufacturer guidance for each analog port.
推薦
VoIP Fax and Data Terminal
The SI3216-FT can be integrated into a communications terminal that combines analog line access with digital voice or modem signaling functions. Its one-channel SLIC and integrated codec reduce the need for separate line-interface and codec devices when the system architecture permits. The PCM interface is particularly relevant to digital transport hardware, while GCI and SPI provide additional control and connectivity options. The codec's 16-bit, 16 kHz format supports narrowband speech to 3.4 kHz and wideband speech to 7 kHz. Because the device is intended for line-facing circuitry, its supply, analog return paths, and external protection network require careful implementation. Confirm all timing, line-state, and interface details in the manufacturer datasheet before releasing a production board.
推薦
推薦產品摘要
工程參考資料，適用於 SI3216-FT — 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 | SI3216-KT | SI3216-C-FT |
|---|---|---|---|
| Package | 38-TSSOP | 38-TSSOP | 38-TSSOP |
| Brand | Silicon Labs | Silicon Labs | Skyworks Solutions Inc. |
| Product Function | 1-channel SLIC and codec | 1-channel SLIC and codec | SLIC and codec |
| Digital Interface | GCI, PCM, and SPI | GCI, PCM, and SPI | GCI and PCM |
主要差異化特點
- Documented same-family replacement path (對比SI3216-KT)
- Single-package interface consolidation (對比SI3216-C-FT)
- Explicit dual-mode voice-band support (對比SI3216-KT)
設計說明
Design the SI3216-FT supply for the documented 3.13 V to 5.25 V operating range and 88 mA supply current. Place local decoupling close to the device's supply and ground pins, and keep the analog and digital return paths organized according to the manufacturer reference layout. The listed 700 mW dissipation is a device-level thermal planning input, so multi-channel boards should also verify aggregate supply capacity and temperature rise.
Use the manufacturer 38-pin TSSOP land pattern and preserve access to every pin during inspection. Keep line-facing analog circuitry away from switching nodes and high-speed digital traces, while routing GCI, PCM, and SPI signals away from sensitive line inputs. Confirm the recommended external line-network component placement and grounding before release; changing these values can alter ringing, gain, and voice performance.
Do not treat the SI3216-KT or SI3216-C-FT as automatic substitutions without checking the complete manufacturer pin descriptions, interface timing, control software, external line-network values, and temperature limits. A shared 38-TSSOP footprint establishes mechanical compatibility but does not by itself establish identical behavior. Review supply current, startup, clocking, and protection requirements on the target board before production release.
合規資訊
A lead-free-status field appears in a distributor datasheet listing, but its value is not clear enough to classify compliance. RoHS, REACH, halogen-free, and conflict-minerals status were not established. AEC-Q100 is not applicable to this commercial 0 °C to 70 °C telecom interface product.
