SI2434-D-GT - 33.6 kbps ISOMODEM | Skyworks | 24-TSSOP
料号： SI2434-D-GT ✓ 量产中SI2434-D-GT 概述
An ISOMODEM is an integrated modem IC that combines digital signal processing with telephone-line interface functions. It belongs to the modem chipset family, interface IC hierarchy, and broader semiconductor category. Its Global DAA provides the analog telephone-line connection, while the integrated modem controller handles modulation, demodulation, data compression, error correction, and signaling protocols used by legacy analog, fax, and data-modem equipment.
Key capabilities include support for ITU-T and Bell data rates from 300 bps through 56 kbps, automatic rate negotiation, Fast Connect operation, V.42 and V.42bis error correction, and MNP2-5 negotiation support. Caller-ID decoding for Type I and II systems provides a useful distinction in telephone equipment, while the 24-TSSOP package supports conventional surface-mount PCB assembly.
Revision D applies to the SI2434, SI2435, SI2457, and SI2404 modem family documentation. This relationship allows engineers to interpret the modem formats and shared features accurately, but each orderable MPN should still be checked for its own electrical limits, pin connections, regional approval requirements, and firmware compatibility. The SI2434-D-GT is identified specifically as the Global DAA version.
Typical uses include industrial data modems, remote terminal equipment, fax interfaces, telephone-line data products, and embedded analog-PSTN communication systems. In these systems, the IC can reduce board area by integrating modem signal processing and the line-side DAA, but external passive components, isolation, line protection, connectors, and approved interface circuitry remain important parts of a production design.
Designers should follow the manufacturer datasheet for the exact 24-pin assignments, supply limits, clock requirements, line-side component values, and recommended layout. Do not substitute a related SI24xx MPN solely because it uses a similar package; confirm pin compatibility, Global DAA requirements, supported protocols, firmware, and applicable telephone-network approvals before releasing a replacement design.
This page combines the exact product identity, package, supported modem formats, protocol capabilities, replacement assessment, and practical design guidance into one engineering reference. It also distinguishes direct replacement evidence from related-family comparisons so procurement and hardware teams can evaluate the SI2434-D-GT without confusing an orderable suffix, package variant, or protocol variant with a verified drop-in replacement.
直接替换替代料： SI2434-D-GT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
SI2434-C-GTR
✅ 直接替换📋 参考替代料（不在目录中）
SI2434-D-GT 规格参数
| Product Type | ISOMODEM with Global DAA |
| Maximum Modem Data Rate | 33.6 kbps |
| Supported Low-Speed Data Rate | 300 bps |
| Documented Family Data Rate Range | 300 bps to 56 kbps |
| ITU-T Modem Formats | V.21, V.22, V.29, V.32, V.42, V.42bis, and V.44 |
| Bell Modem Formats | Bell 103, Bell 212A, Bell 300 bps, and related Bell formats |
| Error Correction | V.42 and V.42bis |
| Compression Support | MNP2-5 |
| Fast Connect Support | Yes |
| Automatic Rate Negotiation | Yes |
| Caller ID Decoding | Type I and Type II |
| Telephone Interface | Global DAA |
| 封装 | 24-pin TSSOP |
| 安装类型 | Surface mount |
| Document Revision | Revision D |
SI2434-D-GT 24-pin tssop 引脚配置指南
SI2434-D-GT（24-pin tssop 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： SI2434-D-GT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI2434-D-GT 适用于 6 应用s: Analog PSTN Data Modem, Remote Terminal Equipment, Industrial Data Communication, Fax Interface Equipment, Caller-ID Telephone Product, Legacy Network Connectivity Adapter.
Analog PSTN Data Modem
The SI2434-D-GT fits an analog PSTN data modem because it combines a 33.6 kbps modem function with a Global DAA in one 24-pin TSSOP device. Its support for V.32-family operation, automatic rate negotiation, V.42/V.42bis error correction, and MNP2-5 allows a terminal to negotiate suitable line modes and improve throughput under variable conditions. Type I and II caller-ID decoding also supports telephone data products. The modem IC should be paired with the manufacturer-recommended line protection, isolation, and passive DAA network, with PCB routing that separates sensitive line-side signals from digital circuitry.
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Remote Terminal Equipment
The SI2434-D-GT is appropriate for remote terminal equipment that must establish a modem connection over a standard analog telephone line. The integrated Global DAA reduces the number of dedicated line-interface functions required on the board, while the 33.6 kbps modem rate supports legacy remote-control and telemetry links. Automatic rate negotiation helps the endpoint select a compatible operating mode, and V.42/V.42bis error handling improves reliability where line impairment is present. Production implementations still need surge protection, telephone-network-approved isolation, and careful separation of the line-side and logic-side ground domains.
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Industrial Data Communication
The SI2434-D-GT can serve as the communication engine in industrial equipment that uses an analog telephone connection for reporting, configuration, or service access. Its support for ITU-T and Bell formats broadens compatibility with legacy endpoints, while Fast Connect and automatic rate negotiation streamline connection establishment. The 24-pin TSSOP package is suitable for dense surface-mount assemblies, although analog telephone designs still need dedicated protection and filtering. The modem data rate should be matched to the effective line bandwidth, and system latency must be evaluated because error correction and retransmission can affect interactive-control performance.
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Fax Interface Equipment
The SI2434-D-GT is suitable for legacy fax-interface equipment built around compatible modem formats and a Global DAA. Its support for V.21, V.22, V.29, V.32, and V.34-family documentation, together with V.42 and V.42bis capabilities, provides several negotiation paths for group-3-style data connections. Automatic rate negotiation can reduce setup complexity when the remote endpoint supports multiple rates. The host processor, image or data pipeline, and telephone interface must be coordinated through the exact Revision D control and timing requirements rather than assuming generic modem behavior.
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Caller-ID Telephone Product
The SI2434-D-GT supports telephone products that decode Type I and Type II caller-ID information while also handling modem data. This dual capability can simplify products in which a single telephone line carries both signaling and communication functions. The Global DAA and 24-pin TSSOP package provide a compact implementation, while automatic rate negotiation and the documented ITU-T and Bell formats support connection establishment with remote endpoints. Decoding support is only one part of the design: host firmware, network signaling compatibility, privacy requirements, and line-side protection must also be implemented correctly.
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Legacy Network Connectivity Adapter
The SI2434-D-GT can form the core of a legacy connectivity adapter that bridges an embedded controller or host processor to an analog PSTN network. Its 33.6 kbps modem capability, Global DAA, automatic rate negotiation, and error-correction protocols provide the required modem functions in one device. The 24-pin TSSOP package simplifies PCB assembly compared with separate modem and line-interface ICs. Designers should budget board area for external DAA components, isolation, surge protection, and filtering, and should verify the required clock, host interface, and firmware configuration against the manufacturer documentation.
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推荐产品汇总
工程参考数据： SI2434-D-GT ——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 | SI2434-C-GTR |
|---|---|---|
| Brand | Skyworks Solutions Inc. | Skyworks Solutions Inc. |
| Package | 24-TSSOP | 24-TSSOP |
| Product Type | ISOMODEM with Global DAA | ISOMODEM |
| Maximum Data Rate | 33.6 kbps | 33.6 kbps |
| Document Revision | Revision D | Earlier C revision |
关键差异点
- Documented Revision D identity （对比 SI2434-C-GTR)
- Global DAA integration （对比 SI2434-C-GTR)
- Broad legacy modem support （对比 SI2434-C-GTR)
设计说明
Route the telephone-line and Global DAA section as a compact analog domain, with the external passive network and protection components positioned close to the relevant SI2434-D-GT pins. Keep digital clock, data, and control traces away from sensitive line-side nodes. Use the manufacturer layout and component-placement guidance for the Revision D reference design, and maintain the specified clearances around the telephone interface.
Design the supply network for the worst-case modem mode rather than only the idle condition. Place the required bypass capacitors at the supply pins with short return paths, and isolate switching supplies and clock sources from the Global DAA area. Confirm voltage limits, current limits, power sequencing, and capacitor tolerances in the manufacturer electrical tables before selecting the regulator and trace widths.
Do not treat SI2435, SI2457, SI2404, or another SI24xx member as a drop-in without checking every pin and function. Similar modem-family documentation can cover different DAA types, protocol mixes, packages, firmware, or regional approvals. The SI2434-C-GTR has a published complete-replacement claim, but even that substitution should be checked against revision-specific firmware and product qualification requirements.
Preserve the timing and return-path margins required by the modem clock and host interface. Avoid long stubs, unnecessary vias, and copper paths that cross between the analog line domain and digital logic. Ground and bypass arrangements should follow the manufacturer reference layout because modem performance can depend on clean supply and controlled return currents in addition to nominal protocol support.
合规信息
The SI2434-D-GT is a legacy analog telephone interface IC rather than an automotive component. No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals status was stated in the cited product information.