SI4114G-B-GM - 1.99 GHz RF Synthesizer | Silicon Labs
料号： SI4114G-B-GM ✗ 停产SI4114G-B-GM 概述
A frequency synthesizer is a clock-and-timing device that generates, multiplies, divides, or locks a reference-derived output frequency to a stable phase relationship. A PLL, or phase-locked loop, compares a divided feedback signal with an input reference and adjusts a controlled oscillator until the loop reaches lock. In the wireless RF signal chain, a frequency synthesizer provides the local oscillator used by mixers to translate information between the carrier frequency and baseband. The SI4114G-B-GM belongs to the broader clock-generation and timing-control hierarchy that includes PLL synthesizers, RF synthesizers, and integrated VCO devices.
Key verified features include one synthesizer circuit, PLL operation, a clock input, a clock output, and a maximum supported frequency of 1.99 GHz. The 2.7 V to 2.9 V operating supply range places the device in a low-voltage RF integration environment. The part is associated with a 28-pin QFN package and is offered in a GM-related ordering configuration. Additional operating details, including exact output-frequency limits, tuning range, reference-input conditions, lock time, phase-noise values, temperature limits, and package dimensions, were not included in the supplied verified records.
Technically, the SI4114G-B-GM integrates the VCO with PLL synthesis functions intended for direct-conversion RF receivers. This integration can reduce the number of separate frequency-generation blocks required around a mixer, although the final receiver design must still satisfy required tuning range, reference frequency, phase-noise, spur, and temperature requirements. Because a PLL synthesizer depends on both its reference source and loop-filter implementation, good reference routing, controlled supply impedance, and deliberate ground-plane design remain essential.
Typical uses include GSM and GPRS direct-conversion receivers, RF transceiver intermediate-frequency sections, and other wireless communication systems requiring a local oscillator below the verified 1.99 GHz maximum frequency. The device may also be relevant to custom RF test equipment or legacy receiver platforms, provided the designer verifies every electrical and timing parameter against the manufacturer datasheet before committing the part to a new PCB.
Designers should not treat the Mouser replacement note as proof that any Si41xx-D-GM product is a one-for-one drop-in replacement. The manufacturer guidance describes multiple Si41xx-D-GM devices, so board-level compatibility, pin assignment, control registers, reference frequency, tuning range, and RF performance must all be checked. The SI4114G-B-GM is also marked not recommended for new designs, making lifecycle risk a primary selection criterion.
This page consolidates the verified distributor information, package and application context, lifecycle warning, source links, and engineering cautions for SI4114G-B-GM. It distinguishes confirmed specifications from unavailable datasheet details and avoids presenting generic cross-reference tools as verified, pin-compatible replacements.
直接替换替代料： SI4114G-B-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： SI4114G-B-GM （相同外形与封装尺寸） ——差异在于 Package, Architecture, Product Type, Supply Voltage Range, Application Category.
SI4113-D-GMR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SI4113-D-GTR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SI4112-D-GTR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SI4136-F-GMR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SI4126-F-BMR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SI4114G-B-GM 规格参数
| Product Type | RF frequency synthesizer |
| PLL | Yes |
| Input Type | Clock |
| 输出类型 | Clock |
| Maximum Frequency | 1.99 GHz |
| Number of Circuits | 1 |
| Supply Voltage Range | 2.7 V to 2.9 V |
| 封装 | 28-QFN (5 x 5 mm) |
| 安装类型 | Surface mount |
| Integrated VCO | Yes |
| Target Communication | GSM and GPRS wireless communications |
| Architecture | Direct-conversion RF frequency synthesizer |
| Lead-Free Status | Lead free |
| Lifecycle Recommendation | Not recommended for new designs |
| Manufacturer-Reported Replacement | Multiple Si41xx-D-GM devices |
SI4114G-B-GM 28-qfn (5 x 5 mm) 引脚配置指南
SI4114G-B-GM（28-qfn (5 x 5 mm) 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： SI4114G-B-GM.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI4114G-B-GM 适用于 6 应用s: GSM Direct-Conversion Receiver, GPRS RF Transceiver, RF Mixer Local Oscillator, Legacy Wireless Test Equipment, Industrial RF Signal Conditioning, Wireless Module Retrofit.
GSM Direct-Conversion Receiver
The SI4114G-B-GM fits a legacy GSM direct-conversion receiver because it is identified as an RF synthesizer with an integrated VCO for GSM and GPRS communications. Its verified 1.99 GHz maximum frequency provides coverage for the intended legacy RF range, while the single synthesizer circuit consolidates a local-oscillator function into one package. The 2.7 V to 2.9 V supply requirement must be accommodated directly in the receiver’s low-voltage power architecture. Designers should confirm channel coverage, reference frequency, tuning range, phase noise, and mixer-drive requirements against the manufacturer datasheet before release.
推荐
GPRS RF Transceiver
The SI4114G-B-GM is applicable to a GPRS transceiver requiring a local oscillator for direct signal conversion. The integrated VCO and PLL provide the verified functional basis for frequency synthesis, while the 1.99 GHz maximum frequency addresses the stated GSM/GPRS application class. Its single-circuit implementation can simplify board planning compared with a discrete oscillator and divider arrangement. However, GPRS products have stringent adjacent-channel and spurious-signal requirements, so the engineer must validate phase noise, reference rejection, lock behavior, and supply-noise performance in the complete radio design.
推荐
RF Mixer Local Oscillator
As a local oscillator for an RF mixer, the SI4114G-B-GM combines PLL synthesis and an integrated VCO in a 28-QFN device. This is relevant to direct-conversion receivers where the required oscillator must remain phase-locked to a reference while operating below the verified 1.99 GHz maximum frequency. Using a phase-locked source can improve frequency stability relative to an unconstrained free-running oscillator, but only when the reference and loop parameters meet the channel requirements. Output power, tuning sensitivity, spur levels, and load compatibility remain datasheet items that must be confirmed.
推荐
Legacy Wireless Test Equipment
The SI4114G-B-GM can support frequency-generation and local-oscillator subsystems in test equipment intended to reproduce legacy GSM or GPRS receiver conditions. Its PLL-based clock output and integrated VCO offer a compact way to create a controllable RF reference up to the verified 1.99 GHz limit. The narrow 2.7 V to 2.9 V supply range requires a clean, dedicated regulator and careful grounding. For production test equipment, engineers should verify output power, tuning resolution, settling time, frequency accuracy, and calibration stability because those values were not included in the supplied verified records.
推荐
Industrial RF Signal Conditioning
The SI4114G-B-GM may be used in industrial RF signal-conditioning equipment where a stable synthesized source is required below 1.99 GHz. Its PLL and integrated VCO architecture allows a system to derive an RF frequency from a stable reference, supporting deterministic measurement or excitation. The component is not recommended for new designs, so industrial users should treat it as a maintenance or controlled-transition choice rather than a long-term platform commitment. Input frequency range, output power, temperature limits, and aging-related performance must be reviewed from the complete manufacturer documentation before it is used outside wireless receiver service.
推荐
Wireless Module Retrofit
The SI4114G-B-GM can support a targeted retrofit of an existing direct-conversion wireless module that already uses its pinout and reference arrangement. The package is a 28-QFN, and the device operates from 2.7 V to 2.9 V, allowing reuse where the mechanical footprint, supply rail, and radio topology already match. This use should be limited to repair and lifecycle-transition work because the product is marked not recommended for new designs. Before substitution, compare the original and proposed device pin maps, control-register behavior, tuning system, reference requirements, and RF test limits; a similar family name alone does not establish compatibility.
推荐
推荐产品汇总
工程参考数据： SI4114G-B-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 | SI4113-D-GMR | SI4113-D-GTR | SI4112-D-GTR | SI4136-F-GMR | SI4126-F-BMR |
|---|---|---|---|---|---|---|
| Package | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Product Type | RF frequency synthesizer | Frequency synthesizer | Frequency synthesizer | Frequency synthesizer | Frequency synthesizer | Frequency synthesizer |
关键差异点
- Purpose-built legacy direct-conversion RF synthesis （对比 SI4113-D-GMR)
- Documented low-voltage operating range （对比 SI4113-D-GTR)
- Integrated single-circuit synthesizer （对比 SI4126-F-BMR)
设计说明
Do not interpret the Mouser statement that multiple Si41xx-D-GM devices are recommended as proof that a single Si4113-D, SI4112-D, SI4136-F, or SI4126-F device is a one-for-one drop-in replacement. First compare the package pin map, reference input, control interface, divider structure, tuning range, and RF output requirements. Treat all alternatives listed here as engineering candidates requiring schematic and layout verification rather than unconditional substitutions.
Design the SI4114G-B-GM supply around its verified 2.7 V to 2.9 V range. Place local high-frequency bypass capacitance at the supply pins and provide a low-impedance return path to the device ground. Because PLL and VCO noise can modulate the synthesized carrier, evaluate supply ripple and regulator noise under minimum, nominal, and maximum channel-frequency conditions. Verify all decoupling values and stability requirements against the manufacturer datasheet.
Keep the reference input, loop-filter components, VCO-related connections, supply pins, and output route compact and isolated from noisy digital and switching circuitry. Maintain a continuous ground reference beneath the 28-QFN device and follow the manufacturer’s exposed-pad and thermal-via layout instructions. RF output routing should minimize excessive trace length and discontinuities, especially when the synthesized signal feeds a mixer or sensitive measurement block.
The quoted distributor price, stock, and lead-time information was not included in the verified dataset, so the quantity tiers use zero as a schema placeholder rather than a commercial price. Request current pricing and lifecycle terms directly from authorized distributors as of 2026-10-29. Because SI4114G-B-GM is not recommended for new designs, compare the total redesign cost of multiple Si41xx-D-GM devices against the cost and availability of maintaining the legacy component.
合规信息
The Mouser listing identifies SI4114G-B-GM as lead free. No verified RoHS, REACH, halogen-free, conflict-minerals, or automotive-qualification statement was supplied.
