SI4126-BM - 2.3 GHz WLAN RF/IF Synthesizer | Silicon Labs
MPN： SI4126-BM ✗ 停產SI4126-BM 概覽
A frequency synthesizer is a clock-and-timing IC that derives or generates a stable output frequency from a reference source. The Si4126 family combines RF synthesis functions with integrated voltage-controlled oscillators, loop filtering, reference and VCO dividers, and phase detectors, enabling wireless communication systems to produce accurately programmed local-oscillator signals. Such devices are part of the broader semiconductor hierarchy: RF synthesizer → frequency synthesizer → clock and timing IC → integrated circuit.
The SI4126-BM is associated with wireless communications and WLAN RF2/IF use, making programmable frequency generation more important than a fixed clock output. The verified source also describes the family as supporting divider and power-down settings through a three-wire serial interface. This interface allows an embedded controller to configure operating conditions and can simplify integration into systems that require multiple RF or IF frequencies. The available data does not provide complete electrical ratings, tuning range, phase-noise values, temperature limits, or control-voltage levels.
Typical implementation uses the synthesizer as the local oscillator for RF upconversion, RF downconversion, or IF signal generation. The generated signal supports channel selection in WLAN equipment and other wireless communication systems. Compared with a fixed-frequency oscillator, a programmable synthesizer permits different operating channels to be selected by changing divider, divider, or frequency-control settings through the serial interface, subject to the detailed register and electrical requirements in the manufacturer documentation.
Engineers should preserve the manufacturer’s recommended reference, loop-filter, grounding, decoupling, and RF-routing layout. The 28-pin surface-mount package requires careful thermal and electrical implementation, particularly when the synthesizer drives downstream mixers or converters. Before layout release, obtain the complete manufacturer datasheet and verify the exact Si4126-BM variant, package drawing, exposed-pad requirements, reference frequency, operating modes, and production lifecycle status.
This page consolidates the verified distributor descriptions, package information, and source links for SI4126-BM and distinguishes confirmed facts from parameters that remain unavailable in the supplied data. It is intended to support initial sourcing and engineering review, not to replace manufacturer validation.
直接替換替代品，適用於 SI4126-BM — 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： SI4126-BM （相同外形與佔位） — 差異在於 Package.
SI4126-F-BM
✅ 直接替換聯絡詢價
查看資料表 →SI4126-BM 規格
| Product Type | Frequency synthesizer IC |
| 功能 | RF and IF frequency synthesis |
| Maximum Reported Frequency | 2.3 GHz |
| 封裝 | 28-pin MLP |
| 安裝類型 | Surface mount |
| Application | WLAN RF2/IF synthesis |
| Wireless Domain | Wireless communications |
| Integrated VCOs | Three VCOs |
| Control Interface | Three-wire serial interface |
| Divider and Power-Down Settings | Programmable |
| Reference Divider | Integrated |
| VCO Divider | Integrated |
| Phase Detector | Integrated |
| Loop Filter | Integrated according to supplied family description |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
SI4126-BM 28-pin mlp 腳位配置指南
SI4126-BM（28-pin mlp 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： SI4126-BM.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI4126-BM 適用於 6 應用s: WLAN RF2 Local Oscillator, WLAN IF Signal Generation, Wireless Transmitter Upconversion, Wireless Receiver Downconversion, Programmable RF Test Signal Source, Embedded Wireless Control System.
WLAN RF2 Local Oscillator
SI4126-BM is identified as an IC synthesizer for WLAN RF2/IF, making it a candidate for programmable local-oscillator generation in WLAN radio chains. The family description identifies integrated VCOs, loop filters, reference and VCO dividers, and phase detectors, allowing a radio design to derive RF-related timing from a reference source. The device can sit ahead of a mixer or RF conversion stage, with divider and power-down settings managed through a three-wire serial interface. The supplied data confirms 2.3 GHz maximum reported frequency and the 28-pin MLP package, but output power, tuning range, phase noise, and channel-plan coverage must be verified before schematic release.
推薦
WLAN IF Signal Generation
The RF2/IF designation makes SI4126-BM relevant to programmable IF generation as well as RF synthesis. In an IF-processing architecture, the synthesizer can provide a controlled reference for downconversion, upconversion, or channel-selection functions when the required IF frequency and divider settings are supported. Its integrated synthesizer blocks reduce the number of discrete frequency-generation elements, while the serial control interface allows a baseband or RF controller to configure operating state. Designers should verify the exact IF plan, output level, spur and phase-noise requirements, reference frequency, and package layout because these details are not present in the supplied snippets.
推薦
Wireless Transmitter Upconversion
SI4126-BM can be evaluated for the programmable oscillator used by a wireless transmitter’s upconversion chain. The device’s RF-synthesis role allows the RF section to select a locally generated frequency for modulation and subsequent power amplification, subject to the required WLAN channel and output-power architecture. The supplied family description names integrated VCOs and phase detectors, which are useful for closed-loop frequency control. Before using SI4126-BM in a transmitter, confirm output drive, tuning range, reference requirements, loop stability, spurious emissions, thermal margin, and regulatory compliance; the supplied source does not quantify those parameters.
推薦
Wireless Receiver Downconversion
SI4126-BM is suitable for initial evaluation as a programmable local oscillator in a wireless receiver downconversion path. A receiver can use the synthesizer to select the required RF channel before mixing the incoming signal to an IF stage, while the three-wire interface supports controlled divider and power-down configurations. This architecture can support channel agility without replacing the synthesizer for every frequency setting. The key engineering checks are reference purity, phase noise, lock behavior, output isolation, supply noise sensitivity, and package parasitics. Because the supplied data does not provide lock range or noise specifications, these must be validated against the full manufacturer documentation.
推薦
Programmable RF Test Signal Source
SI4126-BM can be evaluated in a programmable RF test-signal source when its supported frequency range and output characteristics meet the test plan. The integrated RF synthesizer architecture allows a controller to select frequency settings through the serial interface, making the device potentially useful for bench and factory test fixtures that exercise WLAN receive or transmit paths. The confirmed 2.3 GHz maximum reported frequency gives a starting point for RF-related test planning. However, the supplied sources do not state output power, tuning resolution, phase noise, settling time, or reference input requirements, so those characteristics must be obtained before selecting components for calibrated instrumentation.
推薦
Embedded Wireless Control System
SI4126-BM can fit an embedded wireless-control architecture because its divider and power-down settings are programmable through a three-wire serial interface. A microcontroller or dedicated controller can manage channel-related state, power modes, and synthesizer configuration while coordinating the RF signal path. This is particularly useful where a fixed oscillator would require multiple external components or manual configuration. The verified snippets do not provide the register map, serial timing, voltage levels, or default state, so firmware development must be based on the exact Silicon Labs SI4126 documentation and validated with hardware bring-up.
推薦
推薦產品摘要
工程參考資料，適用於 SI4126-BM — 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 | SI4126-F-BM |
|---|---|---|
| Product Type | RF/IF frequency-synthesizer IC | Frequency-synthesizer IC |
| Manufacturer | Silicon Labs | Skyworks Solutions |
| Package | 28-pin MLP | 28-VFQFN Exposed Pad |
| Maximum Reported Frequency | 2.3 GHz | 2.3 GHz |
| Primary Application | WLAN RF2/IF synthesis | Frequency synthesizer |
主要差異化特點
- WLAN RF2/IF positioning (對比SI4126-F-BM)
- Target package documentation (對比SI4126-F-BM)
- Configuration details (對比SI4126-F-BM)
設計說明
Treat the 28-pin MLP package as a controlled RF and clock layout problem. Place the reference-decoupling network and synthesizer support components close to their associated pins, keep the reference path short, and route high-frequency outputs away from sensitive control and analog nodes. Before committing copper, verify the exact package drawing and exposed-pad or thermal requirements in the manufacturer documentation; those details were not supplied in the verified snippets.
Validate reference-clock jitter, supply sensitivity, spur levels, and output isolation before using SI4126-BM in a WLAN RF or IF chain. The supplied sources confirm synthesizer functionality and a 2.3 GHz maximum reported frequency but do not provide phase-noise, tuning-resolution, settling-time, or output-drive specifications. Therefore, compare measured board-level performance against the receiver or transmitter requirements rather than assuming that nominal synthesizer functionality is sufficient.
Do not substitute a generic oscillator or a similarly named SI4126 variant solely by frequency and lead count. The verified listings describe SI4126-BM as a 28-pin MLP RF2/IF synthesizer, while the closest candidate is described as a 28-VFQFN exposed-pad part. Confirm pin names, pad geometry, control timing, supply rails, reference frequency, and register behavior from the exact manufacturer datasheets before approving a replacement or modifying firmware.
合規資訊
The supplied web data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for SI4126-BM. AEC-Q100 is recorded as not_applicable only as the default classification for this non-automotive clock-and-timing IC; it does not assert a formal qualification result.
