SI2434-C-FT - 33.6k Modem IC | Skyworks Solutions | 24-TSSOP
MPN： SI2434-C-FT ✓ 啟用中SI2434-C-FT 概覽
An ISOModem is a semiconductor implementation of a data modem. In the product hierarchy, a modem integrated circuit belongs to interface ICs, connecting physical communication lines with digital data-processing systems. The SI2434 family combines protocol support, line-interface functionality, and host-facing control into one device, reducing the component count required for a complete modem subsystem.
The SI2434-C-FT supports a broad set of legacy and ITU modem data formats at a maximum rate of 33.6 kbps. Its operating characteristics identify a 4.92 MHz operating frequency, a 3.3 V operating supply, and approximately 17 mA operating supply current. These figures make the device suitable for systems designed around a regulated 3.3 V rail and moderate-power embedded communication equipment.
The device combines parallel, SPI, and UART interface capabilities according to the published ISOModem family comparison information. These host interfaces allow the modem circuitry to be controlled by an embedded microcontroller or other digital controller. Integration of the communication protocol and digital control interface can simplify firmware organization and reduce the number of separate interface devices required in a communications appliance.
Typical uses include legacy data communication, remote terminal equipment, industrial serial links, point-of-sale interfaces, and embedded modem modules. The supported V.21 through V.34 formats and Bell protocols make the SI2434-C-FT appropriate where compatibility with established modem signaling conventions is important. System-level verification remains necessary because line impedance, isolation, connectors, and regional carrier requirements can affect the complete interface.
The primary design consideration is the 3.3 V power architecture. The PCB should provide stable decoupling at the supply pins, controlled signal routing around modem and line-interface circuitry, and adequate thermal margin for the -40°C to +85°C operating range. Designers should also follow the package drawing and pin-description table when assigning tracks and selecting the analog or communication-side components around the device.
This page organizes the principal SI2434-C-FT characteristics, package information, application guidance, comparison points, and sourcing questions. It also identifies the limits of the available technical record so engineers can distinguish documented functions from parameters that still require confirmation in the manufacturer datasheet.
直接替換替代品，適用於 SI2434-C-FT — 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。
此系列的變體
與下列產品可直接替換的同系列型號： SI2434-C-FT （相同外形與佔位） — 差異在於 Product Type, Maximum Data Rate, Manufacturer, Package.
SI2434-C-GT
✅ 直接替換📋 參考替代品（不在目錄中）
SI2434-FT
✅ 直接替換📋 參考替代品（不在目錄中）
SI2404-C-FT
✅ 直接替換聯絡詢價
SI2434-C-FT 規格
| Product Type | ISOModem integrated circuit |
| Maximum Data Rate | 33.6 kbps |
| Supported Data Formats | V.21, V.22, V.23, V.29, V.32, V.34, Bell 103, Bell 212A |
| ISOModem Family Speed Range | 2.4 kbps to 56 kbps |
| Operating Frequency | 4.92 MHz |
| 工作電源電壓 | 3.3 V |
| Operating Supply Current | 17 mA |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | +85 °C |
| 封裝 | 24-pin TSSOP, 4.40 mm width |
| Package Lead Dimension | 0.173 inch |
| 安裝方式 | SMD/SMT surface mount |
| Packaging | Tube |
| Interface Types | Parallel, SPI, UART |
| Global DAA Support | Yes |
| Lead-Free Status | Lead free |
| RoHS 狀態 | RoHS compliant |
SI2434-C-FT 0.173 inch 腳位配置指南
SI2434-C-FT（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： SI2434-C-FT.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI2434-C-FT 適用於 6 應用s: Legacy Remote Terminal Equipment, Industrial Serial Data Links, Point-of-Sale Terminal Communication, Modem Network Interface Modules, Embedded Data Collection Terminals, Communication Retrofit Equipment.
Legacy Remote Terminal Equipment
The SI2434-C-FT fits legacy remote terminal equipment that must communicate through established modem protocols. Its 33.6 kbps maximum rate covers V.21, V.22, V.23, V.29, V.32, V.34, Bell 103, and Bell 212A formats, while the 3.3 V operating supply simplifies integration with modern embedded controllers. The device can operate beside a host processor through parallel, SPI, or UART interfaces, reducing the need for a separate protocol converter. In a finished terminal, engineers still need to add the appropriate line-side network, isolation, protection, and connector. The -40°C to +85°C range supports industrial temperature designs, but enclosure temperature, regulator tolerance, and line-impairment requirements must be evaluated during system qualification.
Industrial Serial Data Links
The SI2434-C-FT is applicable to industrial serial links where legacy modem framing and a compact controller interface are required. Its 24-pin TSSOP package provides a practical surface-mount footprint, and the documented 4.92 MHz operating frequency, 3.3 V supply, and approximately 17 mA operating current give designers concrete starting points for power planning. A microcontroller can configure the supported V.21 through V.34 or Bell formats and exchange data through SPI, UART, or parallel control. Industrial implementation should include transient protection and robust line termination where wiring leaves the enclosure. Because the modem IC does not define every external network component, validate the complete interface against the target serial medium and environmental levels.
Point-of-Sale Terminal Communication
The SI2434-C-FT can support the modem communication section of a point-of-sale terminal that must interoperate with established Bell or V-series protocols. Its 33.6 kbps data rate is suitable for control messages, transaction records, and routine remote-terminal traffic rather than high-volume payload transfer. The compact 24-pin TSSOP package leaves board area for the host processor, memory, display interface, and power circuitry. The operating supply of 3.3 V can support integration with a common embedded power rail, while parallel, SPI, or UART host access allows the system architect to select a suitable control path. A production design must add the approved line interface and appropriate isolation or surge protection and should validate protocol interoperability with every peripheral still deployed in the field.
Modem Network Interface Modules
The SI2434-C-FT is well suited to compact modem network interface modules that expose legacy communication functions to an embedded host. Integrating the ISOModem into a 24-pin TSSOP allows module designers to retain a small board footprint while supporting multiple modem formats up to 33.6 kbps. Host firmware can use the documented SPI, UART, or parallel paths according to throughput and pin-availability requirements. The 3.3 V operating voltage and approximately 17 mA operating current form the principal baseline for the module regulator and thermal design. Module manufacturers should verify line-interface component selection, isolation strategy, and regulatory requirements for each market, because the modem IC alone does not establish finished-product compliance.
Embedded Data Collection Terminals
The SI2434-C-FT can be incorporated into embedded data-collection terminals that periodically exchange records through a modem-compatible channel. Its Bell 103, Bell 212A, and V-series support provides compatibility with common terminal-system conventions, while a maximum rate of 33.6 kbps matches low-to-moderate-throughput telemetry rather than continuous high-speed transfer. The device's 3.3 V supply and three documented host-interface choices make it adaptable to different embedded controller architectures. Designers should configure the modem for the required line conditions and design the analog or line-side section around the manufacturer's reference information. Remote and industrial deployments also need surge, transient, grounding, and enclosure considerations that extend beyond the semiconductor package itself.
Communication Retrofit Equipment
The SI2434-C-FT is appropriate for communication retrofit modules intended to add legacy modem behavior to newer control systems. A retrofit assembly can pair the 24-pin TSSOP ISOModem with a host processor connected through SPI, UART, or parallel signaling, then provide line-side components that meet the target network requirements. The documented 33.6 kbps rate and broad protocol set allow the module to bridge equipment designed around V.21 through V.34 or Bell formats. The 3.3 V operating supply and -40°C to +85°C range simplify integration into industrial retrofits, although power regulation and thermal rise still require design-level verification. Compatibility testing should cover signaling rates, timing, protocol handshakes, and behavior during line transitions and loss of carrier.
工程參考資料，適用於 SI2434-C-FT — 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 | SI2434-C-GT | SI2434-FT | SI2404-C-FT |
|---|---|---|---|---|
| Brand | Skyworks Solutions Inc. | Skyworks Solutions Inc. | Skyworks Solutions Inc. | Skyworks Solutions Inc. |
| Package | 24-TSSOP | TSSOP-24 | TSSOP-24 | TSSOP-24 |
| Maximum Data Rate | 33.6 kbps | 33.6 kbps | 33.6 kbps | 33.6 kbps |
主要差異化特點
- Matches the SI2434-C-GT on all principal published electrical values (對比SI2434-C-GT)
- Provides the same 24-pin package class as SI2404-C-FT (對比SI2404-C-FT)
- Explicitly lists eight supported modem formats (對比SI2404-C-FT)
設計說明
Design the SI2434-C-FT around its documented 3.3 V operating supply and approximately 17 mA operating current. Place the required bypass capacitors directly across the relevant supply pins using the package drawing and manufacturer layout guidance. Keep the regulator's noise and ripple within the device's electrical limits, and confirm the absolute maximum voltage separately before applying power because that value is not stated in the product listing.
Use the exact 24-pin TSSOP land pattern associated with the SI2434-C-FT and preserve the manufacturer's pin numbering. Keep the modem's host-control traces away from sensitive line-side nodes, provide a continuous ground reference, and route external communication circuitry to minimize coupling into the chip. The package is only 4.40 mm wide, so assembly tolerances, solder-mask clearance, and fine-pitch access should be checked before fabrication.
Treat the modem IC, line-side network, connector, and protection components as one controlled signal path. Follow the manufacturer reference arrangement for analog or communication-side components, maintain short return paths, and provide isolation where the interface connects to external wiring. The ISOModem IC does not by itself provide the complete external network, so component values and protection ratings must be established from the application guidance and target-line requirements.
Do not infer full pin compatibility from the shared TSSOP-24 package alone. The SI2434-C-GT, SI2434-FT, and SI2404-C-FT candidates match the principal published voltage, rate, current, temperature, and package values, but suffix-specific features and protocol behavior can still differ. Before substituting a part, compare every pin, power sequence, host-interface setting, timing requirement, and production ordering code.
合規資訊
The component listing identifies SI2434-C-FT as lead free and RoHS compliant. REACH, AEC-Q100, halogen-free, and conflict-minerals status were not identified.
