SI2438-B-GT - 33.6kbps V.34 ISOModem | Skyworks
MPN： SI2438-B-GT ✓ 啟用中SI2438-B-GT 概覽
An ISOModem is a single-chip integrated modem built around International Telephone and Consultative Committee modem technology. Unlike a collection of discrete filters, amplifiers, oscillators, and line-interface components, an integrated modem controller combines modulation, data handling, and control functions into one semiconductor. This makes the ISOModem category useful for embedded data communication, industrial terminal equipment, point-of-sale systems, and other products that must exchange data over a telephone or analog communications channel.
The SI2438-B-GT's defining characteristics include a 33.6 kb/s data rate, V.34 modem operation, ISOModem architecture, and a 24-TSSOP surface-mount package. Its 4.40 mm package width supports compact circuit layouts while exposing separate communication, interface, control, and supply functions around the device. The source listing identifies it as a network controller and processor IC within the telecom interface category, making it suitable for equipment designers evaluating a dedicated modem controller rather than a general-purpose communications processor.
The controller supports integration into embedded modem equipment where a standardized V.34 data path is required. Its parallel, SPI, and UART interface information is associated with the SI2438 family, while the device also provides voice-capable ISOModem operation. Designers should confirm the required host interface, line-side support components, clocking, and termination arrangement against the manufacturer documentation for the exact system configuration before releasing the PCB layout.
Typical applications include legacy data terminals, industrial telemetry equipment, remote-control systems, fax-related data products, point-of-sale terminals, and embedded modem controller designs. The compact TSSOP package is particularly useful where a through-hole interface circuit would consume excessive board area. A complete implementation still requires the external analog line interface, isolation or surge-protection strategy, suitable supply rails, and firmware appropriate to the selected modem operating mode.
The primary design consideration is interface completeness. Because SI2438-B-GT integrates modem control rather than every external telephone-line protection component, the board must include the required analog coupling and protection network. Confirm pin-level signal assignment, crystal or clock requirements, line-driver components, and supply sequencing directly in the pin-description table before schematic release.
This page organizes the SI2438-B-GT specifications, verified package information, related modem controllers, and practical selection guidance into one engineering-focused reference. It also distinguishes documented V.34 operation from related family members whose ordering codes, descriptions, or interface emphasis differ.
直接替換替代品，適用於 SI2438-B-GT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
SI2438-A-GT
✅ 直接替換聯絡詢價
查看資料表 →SI2434-D-GT
✅ 直接替換聯絡詢價
查看資料表 →SI2434-FT
✅ 直接替換📋 參考替代品（不在目錄中）
SI2438-B-GT 規格
| Product Type | ISOModem network controller and processor IC |
| Maximum Data Rate | 33.6 kb/s |
| Modem Standard | V.34 |
| Modem Class | 56k modem |
| Architecture | ISOModem |
| Application Category | Telecom interface IC |
| Package Type | 24-TSSOP |
| Package Width | 4.40 mm |
| Package Width | 0.173 inch |
| 安裝類型 | Surface mount |
| 腳位數 | 24 pins |
| Host Interface | Parallel, SPI, and UART |
SI2438-B-GT 0.173 inch 腳位配置指南
SI2438-B-GT（0.173 inch 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： SI2438-B-GT.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI2438-B-GT 適用於 6 應用s: Embedded V.34 Data Terminals, Industrial Telemetry Equipment, Remote-Control and Access Systems, Point-of-Sale Terminals, Legacy Fax-System Interfaces, Voice-and-Data Communications Modules.
Embedded V.34 Data Terminals
The SI2438-B-GT fits compact data terminals that need a dedicated V.34 modem controller rather than a general-purpose communications processor. Its 33.6 kb/s operating rate defines the channel-throughput target, while the 24-TSSOP package with a 4.40 mm width helps conserve PCB area in terminal-control boards. The controller should be placed near the line-interface network to keep sensitive analog routing short and away from switching circuitry. Designers must implement the specified clock, host interface, supply, and telephone-line coupling components around the IC.
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Industrial Telemetry Equipment
Industrial telemetry equipment can use the SI2438-B-GT when remote data must pass through a modem channel at rates up to 33.6 kb/s. The dedicated V.34 ISOModem function provides a defined alternative to adding a complete communications computer to a small controller. Its surface-mount 24-TSSOP package supports compact instrumentation, but a robust design must include surge protection, isolation requirements, and an analog line interface. Firmware should establish the operating mode, error recovery, and connection timing expected by the field equipment.
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Remote-Control and Access Systems
The SI2438-B-GT is suitable for remote-control equipment requiring a deterministic V.34 modem data path between a local controller and a remote endpoint. A 33.6 kb/s rate is appropriate for supervisory commands, configuration transfers, and moderate diagnostic data rather than high-volume file transfer. The 24-TSSOP footprint allows the modem controller to share space with processing electronics, although the line interface must be isolated from noisy power stages. Include watchdog and line-state handling so communication loss cannot cause unsafe or unintended equipment behavior.
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Point-of-Sale Terminals
Point-of-sale terminals can integrate the SI2438-B-GT when they require legacy V.34 connectivity alongside local transaction processing. The controller's 33.6 kb/s modem function separates communications handling from the terminal's main processor, while the compact 24-TSSOP package limits the space required for the data path. The design must maintain clean separation between modem circuitry and display, keypad, printer, or power-conversion sections. Use the documented host interface and external line network to preserve data integrity across repeated connections and noisy retail environments.
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Legacy Fax-System Interfaces
The SI2438-B-GT can be evaluated for legacy fax-system interfaces because the related SI2438 family is associated with fax and system-side modem functions. Its V.34 operation provides a defined data path at up to 33.6 kb/s for system-side signaling or data exchange. Engineering must verify the exact operating profile, timing, and line-side requirements for the intended fax mode rather than assuming that a general V.34 modem configuration provides every legacy function. The 24-TSSOP package supports board reuse with related SI2438 hardware.
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Voice-and-Data Communications Modules
The SI2438-B-GT supports the design of communications modules that combine a modem data path with voice-related functionality. Its ISOModem architecture and 33.6 kb/s V.34 operation make it useful for equipment that requires a dedicated telephone-channel interface alongside host-controlled data handling. The 24-TSSOP package allows the controller to share a compact module with analog front-end components. Designers should verify the voice operating mode, line-state signaling, host command set, and required analog network in the manufacturer documentation before finalizing the PCB.
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推薦產品摘要
工程參考資料，適用於 SI2438-B-GT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | SI2438-A-GT | SI2434-D-GT | SI2434-FT |
|---|---|---|---|---|
| Package | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP |
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
| Product Class | ISOModem network controller and processor IC | ISOModem fax system-side modem | Network controller and processor IC | Network controller and processor IC |
| Maximum Data Rate | 33.6 kb/s | 56k modem class | 33.6 kb/s | 33.6 kb/s |
主要差異化特點
- Explicit 33.6 kb/s V.34 ISOModem positioning (對比SI2438-A-GT)
- Direct V.34 data-rate parity with a related controller (對比SI2434-D-GT)
- Package width consistency for compact board reuse (對比SI2434-D-GT)
設計說明
Use the manufacturer land pattern for the 24-TSSOP package and verify pin 1 orientation on the PCB assembly drawing. Place the clock and decoupling components close to their associated pins, and route the telephone-line-side nodes away from digital clocks, switching regulators, and high-current loads. A compact 4.40 mm package does not remove the need for careful analog-versus-digital partitioning.
Do not treat the 33.6 kb/s modem rate as a substitute for correct telephone-line implementation. Confirm the required external coupling, protection, impedance, and interface components in the SI2438-B-GT application information. Likewise, verify every host-interface signal and power pin against the complete ordering code because related 24-TSSOP modem controllers can share a footprint while differing in functional emphasis.
Decouple the supply pins at the device with the capacitance and placement specified by the manufacturer. Keep regulator switching loops and inductor areas away from the modem's line-side and clock routing. Confirm supply voltage, operating current, startup behavior, and power-sequencing requirements in the SI2438-B-GT documentation before selecting the local regulator or adding bulk capacitance.
Treat clock and modem-interface routing as controlled-impedance paths when the host processor operates at a high edge rate. Avoid long stubs, unnecessary vias, and routing beneath noisy line-interface components. Provide a continuous ground reference, keep sensitive nodes short, and follow the manufacturer's recommended grounding and separation between the digital controller and analog line network.
合規資訊
The product is a telecom interface IC rather than an automotive-qualified device. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation from the current manufacturer or lot documentation.