SI2435-E-FT - 33.6 kbps V.34 Modem | Skyworks | Fax Systems
Référence : SI2435-E-FT ✓ ActifSI2435-E-FT Présentation
An ISOmodem is an integrated modem solution that combines digital signal processing with telephone-line interface functions. The DAA connects the modem to an analog telephone line while isolating and conditioning the signal path. Within the broader hierarchy, this component is a communication interface IC, a data modem, and ultimately a semiconductor designed for embedded communications equipment.
The SI2435-E-FT supports V.34 operation at 33.6 kbps, providing the principal data-rate specification for this ordering code. Its 24-TSSOP surface-mount package supports compact PCB construction while retaining enough pins for power, control, data, and line-interface connections. The component is identified as the system-side member of the SI2435 and SI2417 two-chip fax-modem chipset described by the manufacturer documentation.
The Si2435 and Si2417 family combines modem processing with a programmable DAA to reduce the number of external components required around a telephone-line interface. This integration is valuable in embedded fax appliances, multifunction peripherals, telephone systems, and other equipment that must communicate over analog telephone lines. The exact power, voltage, timing, and environmental limits should be confirmed in the manufacturer datasheet before schematic release.
A successful design must account for the analog telephone-network environment, including line protection, isolation, grounding, and signal coupling. Follow the reference connection and component-selection guidance in the SI2435/Si2417 datasheet rather than treating the modem IC as a standalone USB or UART peripheral. The device communicates according to a dedicated modem interface rather than a generic serial protocol.
When comparing this part with another modem, verify the line standard, maximum bit rate, chip-set role, DAA architecture, package, pinout, and clock requirements. A device with the same nominal speed is not necessarily a drop-in replacement. Board changes may be required if its digital interface, analog support network, firmware expectations, or package differs.
This product page consolidates the manufacturer specifications, package information, sourcing guidance, application guidance, and verified cross-reference status for the SI2435-E-FT. It also distinguishes confirmed technical facts from electrical details that still require consultation of the official datasheet, helping engineers qualify the device before committing a telephone-interface board to production.
Alternatives de remplacement direct pour SI2435-E-FT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesSI2435-E-FT Spécifications
| Modem Standard | V.34 |
| Maximum Data Rate | 33.6 kbps |
| Device Type | ISOmodem system-side fax modem IC |
| Boîtier | 24-pin TSSOP |
| Type de montage | Surface mount |
| Telephone-Line Interface | Globally programmable direct access arrangement (DAA) |
| DAA Generation | Third-generation DAA |
| Chipset Configuration | SI2435 and SI2417 two-chip fax modem solution |
| Supported Data Rate Range | 14.4 kbps to 33.6 kbps |
Guide de configuration des broches du SI2435-E-FT 24-pin tssop
Configuration des broches du SI2435-E-FT (boîtier 24-pin tssop). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour SI2435-E-FT.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
SI2435-E-FT convient pour 6 applications: Embedded Fax Machine, Multifunction Printer Fax Module, Analog Telephone Data Terminal, Industrial Telemetry Gateway, Remote Service Interface, Telephony Test Equipment.
Embedded Fax Machine
The SI2435-E-FT fits an embedded fax engine that must negotiate V.34 operation at rates up to 33.6 kbps over an analog telephone line. Its system-side ISOmodem role and third-generation programmable DAA reduce the amount of modem and line-interface circuitry required around the controller. The designer should use the SI2435/Si2417 reference architecture, including the specified coupling, isolation, protection, and bypass components. Because the modem communicates through a dedicated chipset interface rather than a standard USB or UART controller, firmware and signal timing must follow the manufacturer datasheet.
Multifunction Printer Fax Module
A multifunction printer can use the SI2435-E-FT when its fax option must support V.34 transmission at up to 33.6 kbps without adding a large discrete modem subsystem. The 24-TSSOP package and integrated DAA architecture support a compact PCB implementation, while the SI2417 companion device provides the complementary chipset function identified by the manufacturer. Implementation effort should center on the documented line-network values, printed-circuit isolation, surge protection, and firmware state machine for connection establishment and data transfer.
Analog Telephone Data Terminal
The SI2435-E-FT is appropriate for a dedicated analog telephone data terminal requiring a standardized V.34 modem path rather than a proprietary line-signaling interface. Supporting rates from 14.4 kbps through 33.6 kbps allows fallback during poor line conditions, assuming the equipment and companion chipset implement the required negotiation behavior. Designers should separate the modem IC from sensitive analog routing, follow the datasheet's DAA reference network, and validate the complete telephone interface against applicable national line requirements before production.
Industrial Telemetry Gateway
An industrial telemetry gateway can employ the SI2435-E-FT when remote equipment must transfer data through a legacy analog telephone network. Its 33.6 kbps V.34 capability is more appropriate for supervisory data, configuration exchange, and periodic logs than high-volume file transfer. The modem still requires careful isolation and surge protection because the telephone line is electrically hostile. Use the manufacturer reference design to reproduce the supported analog network and confirm the system-side timing requirements between the SI2435, SI2417, and host controller.
Remote Service Interface
A remote service or diagnostic unit can use the SI2435-E-FT when field equipment must establish a modem connection over an analog line. At rates up to 33.6 kbps, the link is suitable for firmware logs, configuration files, status reports, and controlled command sessions. The design should include watchdog recovery, line-failure handling, and a defined communications protocol above the V.34 modem layer. The SI2435/Si2417 chipset documentation is the controlling reference for pin functions, clocking, and supported operating modes.
Telephony Test Equipment
Telephone-interface test equipment can use the SI2435-E-FT as a standards-based V.34 modem endpoint for exercising remote connections and line behavior. The supported 14.4 kbps to 33.6 kbps rate range permits the tester to evaluate fallback behavior as well as maximum-rate operation. For dependable measurements, the analog section must be isolated appropriately and the test fixture must preserve the DAA component values and impedance characteristics used by the manufacturer reference network. Firmware should control rate selection and record link-quality results consistently.
Données de référence d'ingénierie pour SI2435-E-FT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Brand | Skyworks Solutions |
| Package | 24-pin TSSOP |
| Modem Standard | V.34 |
| Maximum Data Rate | 33.6 kbps |
| Device Role | System-side ISOmodem |
| Telephone-Line Interface | Globally programmable third-generation DAA |
| Chipset Configuration | SI2435 and SI2417 two-chip fax modem |
| Supported Speed Range | 14.4 kbps to 33.6 kbps |
Principaux différenciateurs
- Defines a complete high-speed V.34 system-side modem role (vs A discrete 33.6 kbps modem implementation)
- Uses a globally programmable telephone-line interface (vs A discrete analog line-interface network)
- Provides a defined companion-chip architecture (vs A standalone modem requiring a different external controller interface)
Notes de conception
Route the telephone-line and DAA-support network exactly as shown in the SI2435/Si2417 datasheet reference schematic. Keep high-voltage or line-coupled traces away from modem digital signals, use the recommended grounding and isolation arrangement, and preserve component placement around the line interface. Because the package is a 24-pin TSSOP, inspect the manufacturer pin-description table for every analog, supply, clock, and signal assignment before releasing artwork.
Do not treat SI2435 and SI2417 as interchangeable pin-compatible devices. The manufacturer identifies SI2435-E-FT as the system-side modem in a two-chip fax-modem chipset, while SI2417 has a complementary role. Review signal direction, clocking, firmware, and the external line network when changing either device. A replacement that only advertises 33.6 kbps is not a drop-in substitute without matching pinout and chipset behavior.
Implement the manufacturer's recommended supply bypassing and component values before evaluating modem performance. Use the datasheet's specified operating voltage and current limits for every rail, and confirm brownout and power-sequencing behavior in the final system. Estimated: total dissipated power equals the sum of each supply rail's voltage multiplied by measured current; this calculation should be checked against the maximum operating conditions rather than the nominal 33.6 kbps condition alone.
Do not design an analog telephone-line input from the modem data-rate specification alone. The line interface also depends on loop impedance, country-specific network requirements, isolation, surge exposure, DAA calibration or configuration, and the companion chipset. Reproduce the documented reference network first, then validate line rate, answer supervision, and disconnect behavior on representative telephone lines.
Informations de conformité
The available technical listings do not provide explicit compliance statements for this ordering code. AEC-Q100 is not applicable because this is a communications interface IC rather than an automotive-qualified device.