SI2400-FS - 2.4 kbps ISOmodem | Silicon Labs | SOIC-16
MPN： SI2400-FS ✓ 啟用中SI2400-FS 概覽
An ISOmodem is a modem chipset interface IC that combines signal-conditioning and modulation functions for analog telephone lines. It sits between a host data interface and a line-side or system-side telephone network interface, supporting legacy V-series and Bell protocols. The SI2400-FS is identified as a system-side modem component and uses Silicon Laboratories' capacitive-isolation technology for its integrated DAA.
The SI2400-FS supports V.21, V.22, V.23, Bell 103, and Bell 212A data formats at a nominal 2.4 kbps class of operation. Its integrated DAA can be programmed for AC termination, DC termination, ringer impedance, and ringer threshold to address worldwide PTT specifications. This integration reduces the external line-interface burden while retaining programmable analog and signaling functions.
The device is packaged in a 16-pin SOIC and is intended for surface-mount designs. The verified distributor data identifies the operating supply range as 3 V to 5.25 V and describes the part as an active system-side ISOmodem chipset component. Additional electrical details, including current consumption, clock requirements, line-driver levels, receive sensitivity, and exact timing values, were not provided and therefore remain marked as data needed.
Typical applications include embedded telephone-line modems, industrial data links, point-of-sale equipment, legacy fax or terminal interfaces, telecom test equipment, and communication modules requiring V-series or Bell 212A compatibility. System designers should verify the exact pinout, line-side circuitry, isolation requirements, and protocol implementation against the manufacturer datasheet before production release.
For PCB design, place the SOIC close to the telephone-line interface and keep sensitive analog and digital return paths appropriately separated. Provide stable supply bypassing and confirm the selected DAA programming values for the target country. Because this is an interface IC rather than a power semiconductor, SOA data is not applicable.
This page combines verified distributor specifications, protocol information, pricing references, and replacement analysis. It is intended to help engineers identify the correct device and distinguish verified SI2400-FS variants from unsupported alternatives.
直接替換替代品，適用於 SI2400-FS — 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： SI2400-FS （相同外形與佔位） — 差異在於 Mounting Type, Package, Product Type.
SI2400-KS
✅ 直接替換聯絡詢價
查看資料表 →SI2400-BS
✅ 直接替換聯絡詢價
查看資料表 →SI2400-KSR
✅ 直接替換📋 參考替代品（不在目錄中）
SI2400-FSR
✅ 直接替換📋 參考替代品（不在目錄中）
SI2400-FS 規格
| Product Type | System-side ISOmodem chipset interface IC |
| Nominal Data Rate | 2.4 kbps |
| Supported Data Formats | V.21, V.22, V.23, Bell 103, Bell 212A |
| 工作電源電壓 | 3 V to 5.25 V |
| 封裝 | 16-pin SOIC |
| 安裝類型 | Surface Mount |
| Family | Si2400 |
| Line Interface Type | Telephone-line modem interface |
| DAA Technology | Proprietary capacitive isolation technology |
| AC Termination | Programmable |
| DC Termination | Programmable |
| Ringer Impedance | Programmable |
| Ringer Threshold | Programmable |
| PTT Compatibility | Programmable for worldwide specifications |
| 生命週期狀態 | Active |
| Lead-Free Status | Lead-free according to distributor listing |
| 腳位數 | 16 pins |
SI2400-FS 16-pin soic 腳位配置指南
SI2400-FS（16-pin soic 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： SI2400-FS.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI2400-FS 適用於 7 應用s: Legacy Telephone-Line Modems, Point-of-Sale Terminals, Industrial Telemetry, Legacy Fax and Terminal Interfaces, Telecom Test Equipment, Embedded Communication Modules, Data-Communication Adapters.
Legacy Telephone-Line Modems
The SI2400-FS fits legacy telephone-line modem systems that operate at a nominal 2.4 kbps using V.21, V.22, V.23, Bell 103, or Bell 212A formats. It provides a system-side ISOmodem function and integrates a silicon DAA with proprietary capacitive isolation. The programmable AC termination, DC termination, ringer impedance, and ringer threshold allow the same device family to address different PTT requirements, although final line components and country settings must follow the manufacturer reference circuit.
推薦
Point-of-Sale Terminals
SI2400-FS is suitable for point-of-sale and transaction terminals that connect to legacy modem infrastructure for low-speed data transfer. The 2.4 kbps nominal rate and support for V-series and Bell formats address compatibility with established telephone-line networks. Its integrated DAA reduces the amount of separate line-interface circuitry, while programmable termination and ringer behavior support regional deployment. Exact external protection, isolation, and connector design must be validated for the target network.
推薦
Industrial Telemetry
The SI2400-FS can support low-speed telemetry equipment that must communicate over analog telephone lines rather than an Ethernet or RF network. Its 2.4 kbps nominal modem operation and selection of V.21, V.22, V.23, Bell 103, or Bell 212A provide protocol flexibility for installed infrastructure. The 3 V to 5.25 V supply range is useful for systems designed around mixed-voltage rails, but the designer must still check line surge protection, grounding, isolation, and operating-temperature requirements.
推薦
Legacy Fax and Terminal Interfaces
SI2400-FS is relevant to legacy fax machines, terminal equipment, and communication appliances that rely on V-series or Bell modem formats. The device's system-side ISOmodem role and integrated DAA allow the modem interface to be implemented in a compact surface-mount design. Its 16-pin SOIC package supports conventional PCB assembly, while programmable line termination and ringer parameters help adapt the interface to different telephone networks. Firmware and host-interface compatibility must be confirmed separately.
推薦
Telecom Test Equipment
SI2400-FS can be used in telecom test and measurement products that need to emulate or interface with legacy 2.4 kbps modem signals. The supported V.21, V.22, V.23, Bell 103, and Bell 212A formats make it useful for protocol and line-interface test fixtures. Its programmable DAA settings help configure AC termination, DC termination, ringer impedance, and ringer threshold for different network simulations. The available verified data does not specify test accuracy or timing margins, so those details must be obtained from the datasheet.
推薦
Embedded Communication Modules
The SI2400-FS is applicable to embedded communication modules that must retain compatibility with analog telephone-line services. Its 2.4 kbps nominal operation and multiple V-series and Bell formats allow the module to support legacy equipment without using a modern broadband modem. The integrated DAA and programmable line parameters can reduce external component count, while the 16-pin SOIC package simplifies inspection and rework. Product-level certification, line protection, and regional telecom approval remain separate design requirements.
推薦
Data-Communication Adapters
SI2400-FS can support adapter products that bridge a host controller to a legacy telephone network. The modem interface provides a defined protocol set and a system-side integration point, while the host side can be implemented with an appropriate serial transceiver. Its 3 V to 5.25 V operating range and surface-mount SOIC construction make it suitable for compact adapter hardware. Before production, confirm the complete pinout, clocking, DAA settings, and system-side protocol requirements.
推薦
推薦產品摘要
工程參考資料，適用於 SI2400-FS — 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 | SI2400-KS | SI2400-BS | SI2400-KSR | SI2400-FSR | SI2400-FS |
|---|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC |
| Product Type | System-side ISOmodem chipset IC | System-side modem chipset IC | System-side modem chipset IC | ISOmodem family candidate | ISOmodem family candidate | System-side ISOmodem chipset IC |
主要差異化特點
- Verified system-side ISOmodem function (對比SI2400-KS)
- Programmable DAA behavior (對比SI2400-BS)
- Integrated capacitive-isolation DAA (對比SI2400-KSR)
設計說明
Place the SI2400-FS in accordance with the manufacturer SOIC footprint and route the telephone-line and digital-interface nets according to the datasheet reference layout. Keep the modem IC close to the line-interface network and provide local supply bypassing. Because the verified data does not include complete pin assignments or recommended trace widths, use the official package drawing and reference schematic rather than estimating dimensions.
The verified operating supply range is 3 V to 5.25 V. Confirm that the system rail remains within this range during startup, line transients, and modem-state changes. Add the manufacturer-recommended supply decoupling and validate the design with the selected external line protection. Do not infer a regulator or capacitor value from the SI2400-FS supply range alone.
Treat the DAA and telephone-line interface as sensitive analog circuitry. Separate telephone-line routing from digital clocks and processor signals, maintain the intended isolation strategy, and avoid long parallel high-current paths near modem nodes. The integrated DAA uses proprietary capacitive isolation, so PCB layout should follow the manufacturer's reference design to preserve modem performance and regulatory behavior.
Do not treat the listed V.21, V.22, V.23, Bell 103, and Bell 212A support as proof that every SI2400-FS variant has identical firmware or host-interface behavior. Confirm the exact protocol mode, country-specific PTT settings, DAA termination values, ringer configuration, and supply requirements for the production design. Cross-reference candidates also require pin-by-pin verification.
合規資訊
Mouser identifies SI2400-FS as lead-free. RoHS, REACH, halogen-free, and conflict-minerals status are not explicitly provided and are therefore not inferred.