SI2434-D-FT - 33.6 kbps ISOmodem | Skyworks Solutions
Référence : SI2434-D-FT ✗ Fin de vieSI2434-D-FT Présentation
An ISOmodem is a highly integrated data communications modem controller that combines modem signal processing, line-interface functions, and host-control interfaces into one device. This type of integrated circuit is used within the broader hierarchy of communications semiconductors, specifically in modem ICs and data communications interface controllers. The SI2434-D-FT is intended for system-side implementations where an external host processor controls the modem through UART, SPI, or parallel interfaces.
Key features include support for data rates from 300 bps up to 56 kbps, automatic rate negotiation for Type I and Type II caller-ID decoding, and no requirement for external ROM or RAM. The device also supports flexible clocking options, including a low-cost 32.768 kHz oscillator and 4.915 MHz clocking, as described in the Revision D data sheet covering the Si2457, Si2434, Si2415, and Si2404 family.
The SI2434-D-FT combines multiple modem formats and negotiation functions in a single controller, reducing the need for separate modulation and protocol blocks. Its system-side architecture allows a host processor to manage configuration, data transfer, and line signaling through the supported serial or parallel control interfaces. This makes the device suitable for embedded telephony, fax, data terminal, modem equipment, and other legacy WAN-access designs.
Typical deployments include 33.6 kbps modem systems, V.34 data communication equipment, integrated data/fax modem modules, and telephone-line terminal products. The 24-pin TSSOP package is suitable for compact surface-mount assemblies where a high pin count is required for modem control, clocking, data, and line-interface connections.
The principal design consideration is ensuring that the host interface, clock source, line interface, and external analog circuitry are configured according to the manufacturer’s application guidance. Because the SI2434-D-FT is a legacy data-modem controller, system designers should verify the required modem standard, line-side interface, supported clocking method, and package-level land pattern before releasing a new design. The manufacturer data sheet and the component’s pin description should be used to assign the 24 TSSOP connections and to implement the required support circuitry.
This product summary consolidates the verified product identity, supported modem formats, package information, and practical use cases into an engineering-focused reference for selecting and integrating the SI2434-D-FT.
Alternatives de remplacement direct pour SI2434-D-FT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec SI2434-D-FT (même facteur de forme et même empreinte) — différant par Package, Product Type.
SI2434-C-FT
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →SI2434-D-FT Spécifications
| Product Type | ISOmodem data modem controller |
| Manufacturer | Skyworks Solutions Inc. |
| Maximum Data Rate | 33.6 kbps |
| Supported Data Rate Range | 300 bps to 56 kbps |
| ITU-T Modem Formats | V.21, V.22, V.23, V.29, V.32, V.32bis, V.34, V.42, V.42bis, V.44 |
| Bell Modem Formats | Bell 103 and Bell 212A |
| Error Correction | MNP2-5 |
| Fast Connect | Supported |
| Automatic Rate Negotiation | Type I and Type II |
| Caller ID Decode | Type I and Type II |
| Host Interfaces | UART, SPI, or parallel |
| External ROM or RAM | Not required |
| Clock Options | 32.768 kHz oscillator and 4.915 MHz |
| Boîtier | 24-pin TSSOP |
| Type de montage | Surface Mount |
| Statut RoHS | RoHS Compliant |
| Lead-Free Status | Lead Free |
| Isolation | Over 6000 V capacitive isolation |
| Datasheet Revision | Revision D |
| Datasheet Document Coverage | Si2457/34/15/04 family |
| Nombre de broches | 24 pins |
Guide de configuration des broches du SI2434-D-FT 24-pin tssop
Configuration des broches du SI2434-D-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 SI2434-D-FT.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
SI2434-D-FT convient pour 6 applications: 33.6 kbps Data Modem Equipment, Legacy Telephone-Line Data Terminal, Embedded Fax and Data Gateway, Industrial Serial Communication Terminal, Caller-ID and Remote Access Equipment, Network Equipment with Legacy WAN Access.
33.6 kbps Data Modem Equipment
The SI2434-D-FT is suited to system-side data-modem designs requiring a 33.6 kbps V.34-class controller in a 24-pin TSSOP package. Its verified modem-format support includes V.21, V.22, V.23, V.29, V.32, V.32bis, V.34, V.42, V.42bis, and V.44, together with MNP2-5 error correction and Fast Connect. Place the controller between the host processor and the modem line-interface circuitry, using UART, SPI, or parallel control according to the host architecture. The principal benefit is consolidation of several modem standards and negotiation functions into one controller; designers must still verify clock selection, line-side implementation, and timing against the manufacturer data sheet.
Recommandé
Legacy Telephone-Line Data Terminal
The SI2434-D-FT can be used in legacy telephone-line terminals that need automatic connection to multiple modem standards. The device supports ITU-T V.21 through selected V.44 formats, Bell 103 and Bell 212A, automatic rate negotiation, and Type I and Type II caller-ID decoding. In a terminal architecture, the host processor initializes the modem through UART, SPI, or a parallel interface, while external line-interface components connect the controller to the telephone network. The 24-pin TSSOP package preserves a compact surface-mount footprint, but clocking and analog support circuits must follow the Revision D application guidance.
Recommandé
Embedded Fax and Data Gateway
The SI2434-D-FT fits legacy embedded gateways that combine data-modem operation with caller-information handling. Its verified feature set includes MNP2-5, Fast Connect, automatic rate negotiation, and Type I and Type II caller-ID decode, allowing the host processor to manage connection establishment and line signaling through UART, SPI, or parallel interfaces. The target’s 24-pin TSSOP package simplifies board integration where a larger controller package would be unnecessary. Validate the required analog line interface, clock source, and any separate fax-processing architecture before implementation, since the verified product information identifies the device primarily as a system-side ISOmodem.
Recommandé
Industrial Serial Communication Terminal
The SI2434-D-FT can support legacy industrial communication equipment that bridges a host processor to modem standards used by remote terminal equipment. Its selectable UART, SPI, and parallel interfaces make it adaptable to different embedded control architectures, while support for 300 bps through the modem-format range addresses low-speed and V.34-class links. The 24-pin TSSOP package is practical for compact controller boards, and the no-external-ROM-or-RAM characteristic simplifies the surrounding digital design. Industrial implementations must add suitable isolation, surge protection, and line-interface circuitry and should confirm operating-temperature and EMC requirements separately.
Recommandé
Caller-ID and Remote Access Equipment
The SI2434-D-FT is appropriate for remote-access equipment that must decode caller identification while supporting multiple connection rates. Type I and Type II caller-ID decode, automatic rate negotiation, Fast Connect, and Bell 103 and Bell 212A support allow the host system to recognize incoming calls and establish compatible data sessions. The controller can operate with UART, SPI, or parallel host connectivity and requires no external ROM or RAM, which reduces the digital footprint. A practical design still needs the specified line-interface network, clock source, isolation strategy, and host firmware for correct signaling and rate-selection behavior.
Recommandé
Network Equipment with Legacy WAN Access
The SI2434-D-FT can serve as the modem controller in network-access equipment that must retain compatibility with legacy WAN and data-modem services. Its support for V.21, V.22, V.23, V.29, V.32, V.32bis, V.34, V.42, V.42bis, V.44, and MNP2-5 provides a broad range of fallback connection modes. The system-side architecture and selectable UART, SPI, or parallel host interface allow integration with routers, gateways, and service equipment. Because this is a legacy communications controller, designers should use the manufacturer’s reference circuitry and verify obsolete external-component availability rather than substituting network-interface parts without checking timing and line-level requirements.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SI2434-D-FT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SI2434-C-FT |
|---|---|---|
| Brand | Skyworks Solutions | Silicon Laboratories |
| Package | 24-pin TSSOP | 24-pin TSSOP |
| Maximum Data Rate | 33.6 kbps | 56 kbps |
| Product Description | V.90, V.34, V.32BIS, V.22BIS ISOmodem | 33.6Kbps or 56Kbps data modem |
| RoHS Status | RoHS Compliant | RoHS Compliant |
| Mounting Type | Surface Mount | Surface Mount |
Principaux différenciateurs
- Target is explicitly identified as a 33.6 kbps V.34 system-side modem controller (vs SI2434-C-FT)
- Broad verified modem-format and negotiation support (vs SI2434-C-FT)
- Multiple host-control interfaces in one controller (vs SI2434-C-FT)
- Compact 24-pin surface-mount integration (vs SI2434-C-FT)
Notes de conception
Treat the SI2434-D-FT as a mixed-signal communications controller and separate its host, clock, and telephone-line connections during PCB layout. Keep the clock route short, provide a ground return adjacent to digital and line-interface circuits, and place decoupling and clock components at the pins designated by the manufacturer application circuit. The exact capacitor values and clock placement must follow the Revision D data sheet rather than general-purpose modem layouts.
Use the supply voltage and bypass requirements stated in the manufacturer data sheet, and account for the current consumed by the modem controller, clock circuitry, host interface, and line-interface support components. Do not assume that the 33.6 kbps modem rating determines the power budget; the operating mode, clock frequency, and enabled modem functions determine actual consumption. Validate startup and shutdown behavior, including any external ROM-and-RAM-free architecture assumptions, in the final system.
The SI2434-C-FT is a 24-pin TSSOP cross-reference candidate, but it is described as a 56 kbps modem while the target listing identifies the SI2434-D-FT as 33.6 kbps. Before treating the candidate as a drop-in replacement, compare supply voltage, clock requirements, host-interface timing, exposed-pin assignments, line-side circuitry, and modem configuration registers between the applicable Revision D data sheets. Do not rely on the package name alone as proof of electrical equivalence.
The 32.768 kHz oscillator and 4.915 MHz clock options must be implemented with short, clean routes and appropriate return paths. Avoid routing modem clock signals near the telephone-line interface and isolate switching supplies or digital timing edges from sensitive line-side nodes. Validate clock amplitude, jitter tolerance, and grounding against the manufacturer timing diagrams, especially when the design uses a low-cost crystal oscillator instead of the alternative clock source.
Do not infer a complete 24-pin assignment from the distributor listing. The searchable excerpts identify the 24-pin TSSOP package and several functional features but do not expose every numbered connection. Use the manufacturer’s pin-description table, land pattern, and reference application circuit to assign power, ground, clock, host-interface, and line-related pins. Review both NC and reserved connections exactly as documented.
Informations de conformité
The verified technical listing identifies the SI2434-D-FT as RoHS Compliant and Lead Free. The component is a communications modem controller rather than an automotive-qualified device; no AEC-Q100 claim is established.
