SI2404-D-FS 56kbps ISOmodem IC | Skyworks | 16-SOIC
Артикул: SI2404-D-FS ✓ АктивенSI2404-D-FS Обзор
An ISOmodem is a modem controller integrated circuit designed for data communication over telephone, analog, or other limited-bandwidth connections. It combines modulation, data handling, call-control signaling, and line-interface functions into a compact device. A system-side ISOmodem normally works with a line-side counterpart, allowing the two devices to divide the functions required for a complete analog data modem connection.
The SI2404-D-FS supports the principal V-series and Bell modem formats identified in the manufacturer documentation, including V.21, V.22, V.23, V.29, Bell 103, and Bell 212A. Related family documentation also identifies V.44, V.42, V.42bis, MNP2-5, automatic rate negotiation, Fast Connect, and Type I and Type II caller-ID decoding. These capabilities make the family applicable to legacy data equipment, embedded communication modules, fax systems, and industrial interfaces requiring standards-compatible modem signaling.
As a 2.4 kbps system-side modem IC, the SI2404-D-FS emphasizes compact implementation and compatibility with established modem protocols. Its 16-pin SOIC package provides a small surface-mount footprint, while the protocol mix allows operation with older terminals, fax machines, remote-management equipment, and telephone-network interfaces. The maximum 56,000 bps family capability depends on the selected line-side companion and does not mean that every operating mode of the SI2404-D-FS itself runs at that rate.
Typical implementations include embedded analog modems, fax-modem modules, industrial remote terminals, point-of-sale equipment, telecommunications test equipment, and legacy data-collection systems. In each application, the correct line-side IC, isolation boundary, analog termination, and network interface must be selected together because the SI2404-D-FS represents the system-side portion of the modem chipset.
When laying out the PCB, place the SI2404-D-FS close to the companion modem and analog-network interface components. Follow the manufacturer pin-description table for supply, ground, clock, control, and analog connections, and preserve the specified decoupling arrangement. Component population and timing values should be selected from the SI2404 family documentation rather than estimated from unrelated modem designs.
This page combines protocol identification, package and rate details, drop-in comparison guidance, and practical integration notes to accelerate component selection. Review the complete SI2404 family datasheet and your system-level modem requirements before releasing a production design.
Аналоги без доработки для SI2404-D-FS — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с SI2404-D-FS (тот же форм-фактор и посадочное место) — отличается по Package, Product Type.
SI2404-D-FSR
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
SI2401-FSR
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Открыть даташит →SI2404-D-FS Характеристики
| Product Type | System-side ISOmodem data communications IC |
| Manufacturer | Skyworks Solutions |
| Base Data Rate | 2,400 bps |
| Maximum Family Data Rate | 56,000 bps with the appropriate line-side companion device |
| Supported Modem Formats | V.21, V.22, V.23, V.29, Bell 103, Bell 212A |
| Related Family Modem Formats | ITU-T and Bell formats, V.44, V.42, V.42bis, MNP2-5 |
| Rate Negotiation | Automatic rate negotiation |
| Fast Connect | Supported by the SI2404/34/15/04 family documentation |
| Caller ID | Type I and Type II decode |
| Корпус | 16-pin SOIC |
| Тип монтажа | Surface mount |
| Product Category | Network controller and processor IC / ISOModem |
Руководство по цоколевке SI2404-D-FS в корпусе 16-pin soic
Цоколевка для SI2404-D-FS (корпус 16-pin soic). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для SI2404-D-FS.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
SI2404-D-FS подходит для 6 применениеs: Legacy Analog Data Modems, Industrial Remote Terminals, Fax and Multifunction Terminals, Point-of-Sale Communications, Telecommunications Test Equipment, Legacy Data Collection Systems.
Legacy Analog Data Modems
The SI2404-D-FS fits system-side modem designs that require established V.21, V.22, V.23, V.29, Bell 103, or Bell 212A operation. Its 2,400 bps base rate and 16-pin SOIC package support compact implementations built around the SI2404 chipset. The system can use the related family capabilities of automatic rate negotiation, Fast Connect, and caller-ID decoding when required, although the selected line-side companion determines the highest available operating rate.
Рекомендуется
Industrial Remote Terminals
Industrial terminals that communicate through older telephone-network services can use the SI2404-D-FS for standardized modem signaling. The device provides 2,400 bps operation across several V-series and Bell formats in a surface-mount 16-pin SOIC. A complete industrial design must add the appropriate line-side companion, analog termination, isolation, surge protection, and product-specific environmental controls. The modem IC supports interoperability but does not provide the complete protection network.
Рекомендуется
Fax and Multifunction Terminals
The SI2404-D-FS is appropriate for legacy fax and multifunction-terminal interfaces that require Bell and ITU modem compatibility. Support for V.21, V.22, V.23, V.29, Bell 103, and Bell 212A gives designers a defined protocol set for older equipment. Its 16-pin SOIC footprint helps reduce board area, while the separate system-side and line-side architecture allows each modem function to be integrated according to the product's line-interface requirements.
Рекомендуется
Point-of-Sale Communications
Point-of-sale terminals that must connect with established terminal equipment can use the SI2404-D-FS for 2,400 bps modem operation. The supported V.21, V.22, V.23, V.29, Bell 103, and Bell 212A formats provide compatibility options for legacy communication infrastructure. The 16-pin SOIC package supports surface-mount assembly, but the complete board still requires the matching line-side device, network coupling components, and a controlled power-supply design.
Рекомендуется
Telecommunications Test Equipment
The SI2404-D-FS can support test equipment that emulates or communicates with established modem standards. Its 2,400 bps operating class and support for both V-series and Bell formats make it suitable for interoperability, line-interface, and signaling investigations. The related family documentation also identifies automatic rate negotiation, Fast Connect, and Type I and Type II caller-ID decoding, which can be valuable in protocol and equipment test scenarios.
Рекомендуется
Legacy Data Collection Systems
Data-collection terminals designed around older telephone-network services can use the SI2404-D-FS as the system-side modem controller. Multiple modem formats and a 2,400 bps base rate support established terminal ecosystems, while the 16-pin SOIC package permits compact retrofit assemblies. Engineers should verify the line-side companion, caller-ID behavior, clock requirements, and analog-network interface against the exact Revision D family documentation before layout release.
Рекомендуется
Справочные инженерные данные для SI2404-D-FS — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | SI2404-D-FSR | SI2401-FSR |
|---|---|---|---|
| Package | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC |
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
Ключевые отличия
- Direct match to established V-series and Bell modem requirements (против SI2401-FSR)
- Same-family alternative with the same named rate and package (против SI2404-D-FSR)
- Broader documented family feature set (против SI2401-FSR)
- Established system-side positioning for legacy modem equipment (против SI2404-D-FSR)
Заметки по проектированию
Place the SI2404-D-FS close to the selected line-side companion and analog-network interface to minimize sensitive-node routing and reduce susceptibility to noise pickup. Follow the Revision D manufacturer pin-description table for power, ground, clock, control, and analog assignments. Do not derive the PCB footprint only from the 16-pin SOIC name; verify land dimensions, pad length, and pin-1 orientation against the package drawing.
Separate modem clock and sensitive analog connections from switching supplies and high-current peripherals. Use the manufacturer-recommended grounding and decoupling arrangement, and route analog-network and isolation-boundary components according to the reference circuit. Estimated: no board-level impedance or noise budget can be assigned without the line-side device, clock source, isolation method, and physical layout, so validate these parameters on the final assembly.
Do not assume that the 56,000 bps family capability is available unconditionally. The SI2404-D-FS is identified at 2,400 bps, and the highest family rate depends on the selected line-side companion device. A replacement also requires verification of modem formats, clocking, firmware, pin functions, and companion-chipset compatibility rather than package and headline-rate matching alone.
Design the supply rails from the exact operating-voltage and current limits in the manufacturer datasheet, then include margin for the attached line-side modem and analog circuitry. Keep regulator switching nodes and magnetics away from clock and analog nodes, and provide local bypass capacitance at the device supply pins as specified by the family reference design. Supply sequencing must also prevent powered modem stages from back-feeding an unpowered SI2404-D-FS.
Информация о соответствии
No definitive environmental or automotive qualification declaration was identified for the exact SI2404-D-FS ordering code. Confirm RoHS, REACH, AEC-Q100, terminal-finish, and conflict-mineral status with Skyworks before production release.