SI3210-FT - 1-Channel ProSLIC SLIC/CODEC | Silicon Labs
料号： SI3210-FT ✗ 停产SI3210-FT 概述
A SLIC, or Subscriber Line Interface Circuit, is the analog-side interface between a telephone line and digital voice-processing equipment. In the product hierarchy, a SLIC belongs to the broader category of telecom interface integrated circuits. The SI3210-FT combines that analog line interface with a codec, DTMF processing, caller-ID generation, ringing-voltage generation, and a DC-DC controller that can track a battery voltage from a 3.3 V to 35 V input. This integration reduces the number of external components required in a subscriber-line access design.
Key features include software-configurable internal ringing for up to five REN, ringing support up to 90 VPK, DTMF generation and decoding, caller-ID generation, and comprehensive BORSCHT functions. The single-channel architecture targets one analog subscriber line rather than a multi-line office endpoint. Its programmable CMOS implementation allows line parameters, tone generation, and signaling behavior to be configured through the associated control interface.
The SI3210-FT uses a PCM and SPI interface for connection to digital communication equipment. The PCM path carries voice samples, while the SPI path supports device configuration and status access. Because the device integrates both codec and line-interface functions, a telephone interface design can use a single high-level IC while retaining access to software-programmable line parameters and signaling features.
Typical applications include analog telephone adapters, voice-over-IP terminal front ends, small-business telephony equipment, digital subscriber line terminal equipment, embedded voice gateways, and legacy telephone-line interface designs. The 38-pin TSSOP package supports surface-mount assembly while retaining a conventional leaded-package footprint for telecom and embedded equipment.
Design attention should focus on the high-voltage ringing path, external line-network protection, DC-DC power-conversion layout, and the separation between sensitive voice signals and switching or ringing waveforms. Follow the manufacturer’s reference layout and component-selection guidance, and verify that the external protection network is appropriate for the maximum ringing voltage and line exposure.
This product page consolidates the device specifications, documented alternatives, application guidance, and practical design considerations into an engineering-focused view. It also distinguishes documented package and electrical differences among candidates so designers can assess PCB reuse, environmental requirements, and firmware compatibility before selecting a replacement.
直接替换替代料： SI3210-FT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SI3210-FT （相同外形与封装尺寸） ——差异在于 Package, Channel Count, DTMF Support, Device Type, Integrated Functions.
SI3210-KT
✅ 直接替换联系询价
查看数据手册 →SI3210-BT
✅ 直接替换联系询价
查看数据手册 →SI3210-GT
✅ 直接替换联系询价
查看数据手册 →SI3210-KTR
✅ 直接替换📋 参考替代料（不在目录中）
SI3210-FT 规格参数
| Product Type | Programmable CMOS SLIC/codec |
| Channel Count | 1 channel |
| 电源电压 | 3.3 V or 5 V |
| Typical Supply Current | 41 mA |
| Reported Supply Current | 88 mA typical |
| Line Performance | 60 dB |
| Internal Ringing Capacity | 5 REN |
| Maximum Configurable Ringing Voltage | 90 VPK |
| DC-DC Controller Input Range | 3.3 V to 35 V |
| Digital Audio Interface | PCM |
| Control Interface | SPI |
| Signaling Functions | DTMF generation and decoding; caller-ID generation |
| BORSCHT Support | All BORSCHT functions |
| 封装 | 38-pin TSSOP |
| 安装类型 | Surface mount |
| Temperature Grade | Commercial |
SI3210-FT 38-pin tssop 引脚配置指南
SI3210-FT（38-pin tssop 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： SI3210-FT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI3210-FT 适用于 6 应用s: Analog Telephone Adapter, Voice-over-IP Terminal Front End, Small-Business Telephony Equipment, Embedded Voice Gateway, Legacy Telephone-Line Interface, Digital Subscriber Line Terminal Equipment.
Analog Telephone Adapter
The SI3210-FT fits a single-line analog telephone adapter because it combines a 1-channel SLIC, voice codec, DTMF generation and decoding, caller-ID generation, ringing generation, and DC battery support. The PCM interface transfers digitized speech to a communications processor while SPI provides configuration access. Its 3.3 V and 5 V operating options simplify adaptation to different system rails, and the 38-pin TSSOP supports conventional surface-mount assembly. The main design task is implementing a robust external line-protection and ringing network while keeping the codec and sensitive analog paths isolated from high-voltage ringing waveforms.
推荐
Voice-over-IP Terminal Front End
The SI3210-FT provides the analog line-facing section for a voice-over-IP terminal, including codec conversion, programmable line control, ringing, and telephone signaling. A processor can exchange PCM audio with the device while using SPI to configure DTMF and caller-ID behavior. With one channel, it is suited to a single-voice-path endpoint rather than a multi-line concentrator. Its 60 dB line-performance specification, five-REN configurable ringing support, and integrated battery tracking can reduce the number of discrete line-interface functions needed around the processor.
推荐
Small-Business Telephony Equipment
The SI3210-FT is suitable for a one-line business phone, voice gateway, or branch-equipment interface where standard telephone signaling and a compact surface-mount implementation are required. It performs the BORSCHT line functions, provides programmable ringing up to 90 VPK, and supports DTMF and caller-ID functions in a single IC. The 3.3 V and 5 V supply choices allow the digital section to align with a common processor platform, while the integrated DC-DC controller handles battery-voltage tracking from a 3.3 V to 35 V input. External surge protection and careful isolation from ringing transients remain essential.
推荐
Embedded Voice Gateway
In an embedded voice gateway, the SI3210-FT can provide the physical-layer interface to a PSTN line while the host processor manages routing, compression, and call control. Its integrated codec avoids a separate audio converter, and its PCM and SPI interfaces provide clear separation between the voice stream and device configuration. The one-channel design is appropriate for gateways with one active analog subscriber line. Designers should use the manufacturer reference circuit for converter layout, validate line impedance against the target network, and reserve space for overvoltage protection that handles the device’s high-voltage ringing environment.
推荐
Legacy Telephone-Line Interface
The SI3210-FT is appropriate for maintaining or reproducing a legacy analog telephone-line interface because it consolidates the SLIC, codec, ringing generator, DTMF functions, and battery-related circuitry. The device supports software configuration for one line and uses a 38-pin TSSOP footprint that can support board reproduction when its schematic and firmware are retained. Its programmable CMOS architecture permits line and signaling adjustments through the control interface. For legacy equipment, verify the external component set, firmware compatibility, ringing waveform, and protection network rather than treating the IC alone as a complete line interface.
推荐
Digital Subscriber Line Terminal Equipment
The SI3210-FT can serve the analog voice-line section of DSL terminal equipment that also requires PSTN voice support. Its one-channel SLIC and codec work with a host processor over PCM and SPI, while DTMF, caller-ID, ringing, and battery functions are handled inside the device. The 3.3 V and 5 V logic options support common embedded platforms, and the 38-pin TSSOP package avoids a large multilayer leaded package. Because DSL equipment may combine high-bandwidth data circuitry with telephone transients, layout must separate the line interface from sensitive data paths and include the manufacturer-recommended protection components.
推荐
推荐产品汇总
工程参考数据： SI3210-FT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SI3210-KT | SI3210-BT | SI3210-GT | SI3210-KTR |
|---|---|---|---|---|---|
| Package | 38-pin TSSOP | 38-pin TSSOP | 38-pin TSSOP | 38-pin TSSOP | 38-pin TSSOP |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Channel Count | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel |
| Digital Interface | PCM and SPI | PCM and SPI | PCM and SPI | PCM and SPI | PCM and SPI |
关键差异点
- Higher documented electrical match than the SI3210-KT candidate （对比 SI3210-KT)
- Directly comparable supply and line-performance data （对比 SI3210-BT)
- Shared package and voltage envelope with SI3210-GT （对比 SI3210-GT)
设计说明
Separate the sensitive codec and line-sensing paths from ringing, surge, and DC-DC switching nodes. Follow the manufacturer reference layout for the integrated converter, power inductors, capacitors, and protection components. Place input and output capacitor networks at their designated power pins with short return paths, and route high-voltage ringing conductors away from the PCM and SPI traces. This arrangement reduces switching pickup, crosstalk, and the chance that a transient couples directly into voice circuitry.
Do not treat the integrated SLIC as a complete surge-protection solution. The telephone line can present external overvoltage conditions beyond normal ringing operation, so retain the specified protection network and verify its current, power, and capacitance ratings against the intended network. Also confirm the external line impedance and DC-feed components with the manufacturer’s reference design; incorrect values can alter voice level, return loss, distortion, and the behavior of DTMF signaling.
Design the 3.3 V and 5 V supply rails independently from the high-voltage ringing and DC feed requirements. The integrated DC-DC controller can track a battery voltage from a 3.3 V to 35 V input, but its external magnetics, switching components, compensation, and layout must follow the manufacturer’s application circuit. Check startup behavior, supply sequencing, converter loop stability, and the voltage headroom needed for the ringing and line functions rather than assuming the logic rail can power the entire interface.
Maintain controlled return paths for the analog voice interface and use the documented grounding scheme around the codec and SLIC pins. Keep ringing and DC-DC switch nodes on the opposite side of the layout where practical, and terminate the PCM interface according to the system clock and signal-integrity requirements. If the PCM bus is long or shared, check voltage levels, series termination, clock skew, and ground bounce at the destination processor rather than relying only on nominal logic compatibility.
合规信息
The SI3210-FT is identified as a commercial-grade device, but no explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 declaration appears in the cited manufacturer descriptions. Treat all unstated compliance attributes as unknown.
