SI2439-A-GM V.34/V.92 ISOMODEM | Skyworks Solutions
料号： SI2439-A-GM ✓ 量产中SI2439-A-GM 概述
An ISOmodem is an integrated modem interface and data-access arrangement used within communications equipment. In this product category, the modem controller and telephone-line interface functions are combined to reduce the number of external components needed by the host system. Within the broader hierarchy, an ISOmodem is an interface IC, a communication IC, and ultimately a semiconductor designed to connect digital equipment to analog or digital communication channels.
The SI2439-A-GM is identified by Skyworks Solutions as a V.34/V.92 modem with global DAA support. It supports operation up to 33.6 kbps, as confirmed by the product listing for the exact MPN. The 38-QFN package places the device in a compact surface-mount format suitable for high-density communication equipment, while the exposed-pad construction provides a defined path for heat transfer through the PCB. The 3 V to 3.6 V operating supply allows integration with common low-voltage digital systems.
A primary use for this device is a data communications terminal or remote-access unit requiring a complete system-side modem. The global DAA can support country-specific telephone-line interfaces while the V.34 and V.92 capabilities provide compatibility with legacy and higher-speed modem standards. Integration can reduce board area compared with a discrete codec, line-driver, and controller implementation, although the host equipment must still satisfy the applicable telephone-network requirements.
Designers should pay close attention to the analog line interface, supply decoupling, exposed-pad soldering, and signal-integrity layout. The manufacturer datasheet is the controlling document for pin assignments, recommended external circuitry, timing, electrical limits, and programming procedures. Because the modem connects directly to communication circuitry, keep sensitive analog routing separated from noisy digital and power-conversion paths, and provide the required bypass capacitors close to the supply pins.
This product page organizes the exact SI2439-A-GM identity, package information, technical specifications, sourcing guidance, and verified same-family alternatives into one engineering reference. It also distinguishes confirmed catalog parameters from detailed electrical characteristics that must be established from the manufacturer datasheet before schematic capture or production release.
直接替换替代料： SI2439-A-GM ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SI2439-A-GM （相同外形与封装尺寸） ——差异在于 Maximum Data Rate, Package, Product Type.
SI2439-B-GM
✅ 直接替换📋 参考替代料（不在目录中）
SI2439-C-GM
✅ 直接替换📋 参考替代料（不在目录中）
SI2494-A-GM
✅ 直接替换联系询价
查看数据手册 →SI2439-A-GM 规格参数
| Product Type | V.34/V.92 ISOmodem system-side interface IC |
| Maximum Data Rate | 33.6 kbps |
| Supported Modem Standards | ITU-T V.34 and V.92 |
| DAA Support | Global DAA |
| Supply Voltage Range | 3 V to 3.6 V |
| 封装 | 38-pin QFN, 5 mm x 7 mm |
| Package Form | 38-VFQFN with exposed pad |
| 安装类型 | Surface mount |
| Component Category | Modems ICs and Modules |
| Product Family | ISOmodem chipset |
| Data Standards | V.92 and V.34 |
| RoHS 状态 | RoHS compliant |
| Lead-Free Status | Lead free |
SI2439-A-GM 38-vfqfn with exposed pad 引脚配置指南
SI2439-A-GM（38-vfqfn with exposed pad 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： SI2439-A-GM.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI2439-A-GM 适用于 6 应用s: V.34 Remote-Access Terminal, V.92 Data-Modem Equipment, Global-DAA Telephone Interface, Industrial Data Communication Gateway, Embedded Data Terminal, Telecommunications Service Equipment.
V.34 Remote-Access Terminal
SI2439-A-GM fits a remote-access terminal requiring a system-side modem at up to 33.6 kbps. The confirmed V.34 capability provides the protocol foundation, while V.92 support broadens compatibility with the surrounding access equipment. Place the IC beside the telephone-network interface and route the analog line signals according to the manufacturer reference design. Its 38-QFN 5 mm by 7 mm package preserves board area in compact terminal hardware, but the exposed-pad land pattern and grounding layout must follow the datasheet exactly.
推荐
V.92 Data-Modem Equipment
SI2439-A-GM is suitable for equipment designed around V.92 modem operation while retaining V.34 compatibility. The device's documented maximum data rate of 33.6 kbps makes it relevant to legacy and transition-era modem systems, and its global DAA support simplifies integration where country-specific line-interface behavior must be managed. The 3 V to 3.6 V operating range aligns with low-voltage host logic, although the power architecture, bypass network, and host-control interface must be implemented exactly as described by Skyworks Solutions.
推荐
Global-DAA Telephone Interface
The global DAA identified for SI2439-A-GM supports telephone-interface designs intended for internationally varied line conditions. Integrating the DAA-related function into the system-side modem can simplify board partitioning while retaining V.34 and V.92 operation. However, DAA integration does not remove country-specific certification or network-interface obligations. The implementation should follow the recommended line-network components, isolation strategy, and analog layout in the manufacturer datasheet, with particular attention to keeping sensitive line signals away from digital switching paths.
推荐
Industrial Data Communication Gateway
SI2439-A-GM can support legacy connectivity in an industrial gateway that must interoperate with V.34 or V.92 modem equipment. The 33.6 kbps rate is appropriate for low-bandwidth control, configuration, and monitoring links rather than modern high-throughput traffic. Its 38-QFN package supports compact industrial terminal designs, but deployment requires confirmation of operating-temperature limits, EMC performance, and environmental compliance from the manufacturer documentation before the product is used in harsh environments.
推荐
Embedded Data Terminal
SI2439-A-GM is appropriate for embedded terminals that require a direct modem connection rather than an external USB or network modem. Supporting both V.34 and V.92 lets one platform address a broad range of legacy access equipment. The compact 38-QFN package and 3 V to 3.6 V supply support integration into dense embedded systems, while system designers must budget board area for the recommended external telephone-interface network, bypass capacitors, and exposed-pad thermal construction.
推荐
Telecommunications Service Equipment
SI2439-A-GM can be evaluated for telecommunications service equipment that still depends on V.34 and V.92 modem links. The global DAA and system-side modem positioning make it relevant to line-interface subsystems, test equipment, and legacy-access adapters. Since the catalog summaries establish protocol and packaging but not full electrical ratings, engineers should verify clock tolerance, line impedance requirements, operating temperature, EMC behavior, and production test procedures in the manufacturer datasheet before architecture approval.
推荐
推荐产品汇总
工程参考数据： SI2439-A-GM ——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 | SI2439-B-GM | SI2439-C-GM | SI2494-A-GM |
|---|---|---|---|---|
| Package | 38-QFN (5x7) | 38-QFN (5x7) | 38-QFN (5x7) | 38-QFN (5x7) |
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
| Product Type | System-side ISOmodem | System-side ISOmodem | System-side ISOmodem | V.92/V.34 ISOmodem |
| V.34 Support | Supported | Supported by SI2439 family | Supported by SI2439 family | Supported |
| V.92 Support | Supported | Supported by SI2439 family | Supported by SI2439 family | Supported |
关键差异点
- Exact cataloged V.34 and V.92 system-side modem configuration （对比 SI2494-A-GM)
- Direct A-grade ordering variant （对比 SI2439-B-GM)
- Compact 38-QFN integration in a 5 mm by 7 mm footprint （对比 SI2439-C-GM)
设计说明
Use the manufacturer PCB land pattern for the 38-QFN 5 mm by 7 mm package, including its exposed pad, rather than creating a generic 38-pin footprint. Confirm pad dimensions, solder-mask opening, and paste stencil against the latest package drawing. A mechanically correct footprint is essential because the exposed pad also provides the primary vertical thermal path and may be tied to ground according to the reference design.
Separate the telephone-line and other sensitive analog paths from digital clocks, switching-regulator nodes, and high-current return paths. Keep the modem and its recommended passive network compact, use short ground returns, and avoid routing communications traces beneath isolated or noisy regions. Follow the manufacturer reference layout for component orientation and line-network placement because small analog-routing differences can affect signal integrity and test margins.
Design a stable 3 V to 3.6 V supply for the modem and place the recommended bypass capacitors close to their associated device pins. Check the datasheet for sequencing, ripple tolerance, and capacitor technology before fixing the power network. The exposed-pad connection should follow the manufacturer grounding instructions, and analog supply branches should avoid sharing high-impedance return paths with unrelated digital loads.
Do not treat SI2439-B-GM, SI2439-C-GM, or SI2494-A-GM as interchangeable solely because they are related modem variants. Compare the complete pin-description table, clock requirements, protocol features, host interface, DAA implementation, recommended external network, and exposed-pad connection. Any substitution also requires confirmation that the package suffix, temperature grade, and production configuration remain equivalent.
合规信息
The SI2439-A-GM datasheet listing states RoHS compliant and lead free. No AEC-Q100 qualification, REACH status, halogen-free declaration, or conflict-minerals statement is established.
