SI3018-FS - Global V.92/V.34 DAA Interface IC | Skyworks
料号： SI3018-FS ✗ 停产SI3018-FS 概述
A direct access arrangement, or DAA, is the telephone-line interface between a modem and the public switched telephone network. A DAA belongs to the broader category of telecom interface integrated circuits, where it sits between a data communications modem and the analog telephone line. Its primary purpose is to provide the required line termination, signal coupling, and isolation functions in a programmable integrated implementation.
The verified manufacturer material identifies SI3018 as the global line-side device in the Si3056 family and states that the related Si3056 supports four AC termination impedances with the SI3018 line-side device. The SI3018-FS combines this global DAA positioning with V.92 and V.34 modem support. Its 16-pin SOIC package allows the device to be assembled with conventional surface-mount production equipment while reducing the external component count of a discrete telephone-line interface.
The SI3018 family is associated with the Si3056 modem platform, which integrates modem functionality and a global DAA. Using a dedicated line-side interface can simplify modem board partitioning and reduce the amount of analog circuitry that must be laid out, tuned, and qualified. This is particularly relevant to compact modem, fax, voice-over-data, and embedded communication equipment that must connect to analog telephone networks.
Designers must treat line-side telephone interfaces as isolated high-voltage domains. The SI3018-FS replaces several external isolation and hybrid components, but the application still requires correct line-side routing, separation from logic-side circuitry, approved protection components, and compliance with the applicable national telecommunications requirements. The available verified results do not provide the complete electrical limits or recommended component values.
The principal selection trade-off is integration versus flexibility. The SI3018-FS is attractive when a design specifically targets its supported global line interface and modem ecosystem because it can reduce external parts and board area. Designs requiring different country-specific line parameters, AC termination impedances, or different modem interfaces should verify the exact ordering code and pin-level compatibility against the manufacturer datasheet before committing to a replacement.
This page consolidates the verified distributor listings, manufacturer family data, package information, comparison fields, and practical sourcing guidance for the SI3018-FS. It also distinguishes confirmed ordering variants from unsupported assumptions, making it easier for engineers to identify whether a candidate is truly pin-compatible before modifying an existing telecom design.
直接替换替代料： SI3018-FS ——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： SI3018-FS （相同外形与封装尺寸） ——差异在于 Manufacturer, Mounting Type, Product Type.
SI3018-F-FS
✅ 直接替换📋 参考替代料（不在目录中）
SI3018-GS
✅ 直接替换联系询价
查看数据手册 →SI3018-F-GSR
✅ 直接替换📋 参考替代料（不在目录中）
SI3018-FS 规格参数
| Product Type | Programmable global line-side direct access arrangement (DAA) interface IC |
| Manufacturer | Skyworks Solutions, Inc. |
| Supported Modem Standards | V.92 and V.34 |
| Modem Platform Association | Si3056 family |
| Line Interface | Global telephone line-side DAA |
| Programmability | Programmable telephone-line interface |
| AC Termination Configurations | 4 configurations for the SI3018 line-side device |
| 封装 | 16-pin SOIC |
| 引脚数量 | 16 pins |
| 安装类型 | Surface-mount SOIC |
| Discrete AFE Requirement | Eliminates a separate analog front end |
| Isolation Transformer Requirement | Eliminates a separate isolation transformer |
| Relay Requirement | Eliminates separate relays |
| Opto-Isolator Requirement | Eliminates separate opto-isolators |
| Four-Wire Hybrid Requirement | Eliminates a separate four-wire hybrid |
SI3018-FS 16-pin soic 引脚配置指南
SI3018-FS（16-pin soic 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： SI3018-FS.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI3018-FS 适用于 6 应用s: V.92 Internet Modem, V.34 Fax and Data Modem, Voice-over-Data Terminal, Fax Machine Line Interface, Industrial Telephone Data Gateway, Legacy Remote Diagnostics Access.
V.92 Internet Modem
The SI3018-FS fits a V.92 analog modem because the verified manufacturer material associates the SI3018 global line-side DAA with the V.92 modem family. The 16-pin SOIC implementation can replace the external analog front end, isolation transformer, relays, opto-isolators, and four-wire hybrid described in the datasheet excerpts. That consolidation can reduce board area and assembly effort while retaining a recognizable modem-to-telephone-line architecture. The principal design constraint is not raw integration but correct configuration: engineers must match the target ordering code to the intended AC termination impedance, external protection network, isolation boundary, and regional telephone-network requirements before release to production.
推荐
V.34 Fax and Data Modem
A V.34 fax or data modem can use the SI3018-FS when its line-side requirements match the supported global DAA configuration. The verified search result identifies V.34 operation for the Si3056 and SI3018/19/10 family, while the SI3018 is specifically described as the line-side device. Integrating the DAA functions removes several external telephone-interface components and simplifies the relationship between the modem circuitry and the line connector. Implementation still requires a careful review of termination impedance, surge protection, isolation spacing, and the regulatory network requirements for the country where the equipment will be connected.
推荐
Voice-over-Data Terminal
The SI3018-FS is suitable for compact voice-over-data terminals that must bridge a modem data path and an analog telephone line. Its V.92 and V.34 association supports the modem-generation requirements of such equipment, while integration of the analog front end and isolation-related discrete functions can reduce the terminal footprint. The 16-pin SOIC package is compatible with surface-mount assembly, but the implementation must preserve the reinforced isolation boundary between line-side and logic-side circuits. External protection and filtering should be selected from the manufacturer reference design rather than inferred from the abbreviated distributor listings.
推荐
Fax Machine Line Interface
The SI3018-FS can serve the line interface in a fax machine or multifunction peripheral built around V.34 modem technology. Consolidating the direct access arrangement into one 16-pin SOIC device can simplify the analog board section by replacing discrete line-interface blocks with a controlled integrated implementation. The verified family data reports four AC termination impedances for the SI3018 line-side device, giving an engineer configuration choices to evaluate against the target telephone network. Before substitution, verify the exact termination code, external surge-protection circuit, hook-state behavior, and national network approval; the provided excerpts do not expose all of those limits.
推荐
Industrial Telephone Data Gateway
An industrial telephone data gateway can use the SI3018-FS to provide a compact V.92 or V.34 modem connection to an analog line. The integrated DAA reduces the number of external line-interface components, which is useful in equipment where board area and serviceability are constrained. The same-family SI3018 variants should be compared by ordering code rather than by MPN appearance alone, since the supplied excerpts confirm the shared 16-SOIC package but do not publish the full country and termination matrix. Deployment into an industrial enclosure also requires checking temperature limits, grounding, surge exposure, and isolation requirements against the manufacturer documentation.
推荐
Legacy Remote Diagnostics Access
The SI3018-FS is appropriate for legacy remote diagnostics equipment that requires an analog modem path for maintenance or control access. V.92 and V.34 support allows the equipment to work with established modem infrastructure, while the integrated DAA can shorten the analog design cycle by removing separate front-end, relay, transformer, and hybrid stages. The design should treat the device as part of a regulated telephone-network interface rather than as an ordinary logic IC. Consequently, creepage, clearance, protection grounding, connector exposure, and product-level approvals remain central validation tasks even though the IC itself is packaged in a standard 16-pin SOIC.
推荐
推荐产品汇总
工程参考数据： SI3018-FS ——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 | SI3018-F-FS | SI3018-GS | SI3018-F-GSR |
|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same |
| Brand | Skyworks Solutions, Inc. | Skyworks Solutions, Inc. | Skyworks Solutions, Inc. | Skyworks Solutions, Inc. |
| Product Type | Global line-side DAA interface IC | Global line-side DAA interface IC | SI3018 family line-side DAA interface IC | SI3018 family line-side DAA interface IC |
| Supported Modem Standards | V.92 and V.34 | V.92 and V.34 family | V.92 and V.34 family | V.92 and V.34 family |
| AC Termination Configurations | 4 configurations for SI3018 line-side device | 4 configurations for SI3018 line-side device | 4 configurations for SI3018 line-side device | 4 configurations for SI3018 line-side device |
| Discrete AFE Integration | Eliminates separate analog front end | Eliminates separate analog front end | SI3018 family integration | SI3018 family integration |
| Isolation Transformer Integration | Eliminates separate isolation transformer | Eliminates separate isolation transformer | SI3018 family integration | SI3018 family integration |
| Four-Wire Hybrid Integration | Eliminates separate four-wire hybrid | Eliminates separate four-wire hybrid | SI3018 family integration | SI3018 family integration |
关键差异点
- Same-family 16-SOIC replacement path （对比 SI3018-GS)
- Closest documented global DAA ordering candidate （对比 SI3018-F-FS)
- Integration of multiple discrete line-interface blocks （对比 Generic interface IC candidates)
设计说明
Route the line-side section as a distinct, tightly controlled high-voltage isolation domain rather than mixing telephone-network traces with logic signals. Keep the SI3018-FS, protection components, termination network, and line connector in the same controlled area, and maintain the clearance and creepage distances required by the product's applicable telephone-network and safety regulations. The verified excerpts confirm that the DAA integrates several isolation-related discrete functions, but they do not provide the approved PCB stack-up or spacing values; use the manufacturer reference layout and applicable product standard for final dimensions.
Do not treat suffix-only changes as automatically interchangeable. The verified records confirm that SI3018-FS, SI3018-F-FS, SI3018-GS, and SI3018-F-GSR belong to a related 16-SOIC SI3018 family, but the supplied snippets do not publish the country-code, termination, reel, or purchasing-option matrix. Compare the complete ordering information in the Skyworks datasheet and configuration guide. In particular, avoid using SI3018-F-FS-R solely as an alternative because its R suffix appears to relate to reel packaging, which does not add distinct engineering value.
Place the line-side protection and filtering components adjacent to the telephone connector and the DAA pins in the order recommended by the manufacturer reference design. This minimizes the length of unprotected or high-energy traces and helps control surge current, ringing, and EMI coupling into adjacent modem circuitry. Keep the 16-pin SOIC and its decoupling network close to the relevant modem interface and follow the datasheet layout for sensitive analog and digital connections. The provided search excerpts identify the functional integration but do not provide trace-width, via, or grounding guidance, so those values should not be guessed.
The SI3018-FS belongs to the V.92 and V.34 modem ecosystem, so its logic-side supply, clock, and data interfaces must be designed to match the companion modem platform. Follow the manufacturer power-sequencing, decoupling, and interface recommendations exactly; telephone-line equipment can combine a sensitive modem signal path with an isolated line domain. The verified data does not state the operating voltage, quiescent current, or absolute maximum ratings, so verify all supply limits in the current manufacturer PDF before selecting capacitors, regulators, or protection components.
合规信息
The verified snippets do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable because this is a telecommunications line-side interface IC rather than an automotive-qualified device.