8N4SV75BC-0099CDI - FemtoClock VCXO 187.5 MHz LVDS 6-CLCC | Renesas
MPN： 8N4SV75BC-0099CDI ✓ 啟用中8N4SV75BC-0099CDI 概覽
What is a FemtoClock VCXO? A VCXO (Voltage-Controlled Crystal Oscillator) is a timing component whose output frequency can be finely adjusted by an external control voltage, enabling PLL-based jitter attenuation or frequency fine-tuning in synchronous networks. A FemtoClock refers specifically to the Renesas/IDT FemtoClock NG family that combines a fractional-N PLL with a low-jitter oscillator core to deliver sub-picosecond RMS phase jitter, typically below 0.5 ps RMS (12 kHz to 20 MHz). These devices occupy the application layer between standard XOs (no tuning) and full clock generators, in the broader hierarchy of clock and timing ICs inside the Power Management / Clock & Timing tree of an electronic system.
Key features of this part include a programmable output frequency from 15.476 MHz to 866.72 MHz, low additive RMS jitter under typical LVDS load, an integrated Voltage Controlled Crystal Oscillator tuning port with a sensitivity optimized for 50 ppm pull range, an operating supply range of 2.375 V to 3.465 V, and a select-one of eight pre-configured frequency profiles stored in one-time programmable (OTP) memory. The LVDS output swing (~350 mV differential) provides strong noise immunity for backplane and high-speed serial links, while the 6-CLCC hermetic package simplifies board integration for industrial designs.
Architecture-wise, the 8N4SV75 FemtoClock platform routes the VCXO output through a sigma-delta fractional-N PLL to the LVDS driver. The PLL multiplier and divider ratios are encoded into OTP during the Renesas factory programming step, so every MPN variant (e.g. -0099CDI vs -0999CDI8) corresponds to a unique frequency code.
Typical applications include telecom backplane synchronization, network routers and switches, FPGA and ASIC reference clocks, PCIe/SERDES reference inputs, and instrumentation timing cards. Designers select this part when they require a board-mounted frequency reference with a fine tuning range and picosecond-level jitter without designing a discrete PLL.
When laying out, keep LVDS traces at 100 ohm differential, place the AC-coupling caps close to the receiver, and power the rail from a low-noise LDO. Decoupling requirements and OTP programming constraints should be confirmed against the Renesas family datasheet before schematic commit.
This page integrates distributor stock levels, drop-in compatible FemtoClock alternatives, and parameter-by-parameter application notes not present in any individual listing.
直接替換替代品，適用於 8N4SV75BC-0099CDI — 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。
8N4SV75BC-0094CDI8
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
8N4SV75BC-0098CDI8
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
8N4SV75BC-0100CDI8
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
8N4SV75BC-0099CDI8
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
8N4SV75FC-0099CDI
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
8N4SV75BC-0099CDI 規格
| Family | FemtoClock NG (8N4SV75) |
| 功能 | Programmable VCXO Frequency Synthesizer |
| 輸出類型 | LVDS |
| Output Frequency | 187.5 MHz (factory programmed) |
| Frequency Programming Range | 15.476 MHz to 866.72 MHz (family-level) |
| 供應電壓 | 2.375 V to 3.465 V |
| 封裝 | 6-CLCC (7.0 x 5.0 mm, hermetic) |
| 安裝類型 | Surface Mount |
| Terminal Finish | Matte Tin (Sn), JESD-609 e3 |
| Lead Free / RoHS | Yes / Compliant |
| 工作溫度 | -40C to +85C (industrial) |
| 腳位數 | 6 |
| Programming Interface | OTP (factory programmed by Renesas) |
8N4SV75BC-0099CDI 腳位配置
| 腳位 1 | VCC — Positive supply voltage 3.3 V nominal |
| 腳位 2 | NC — Not connected (per family datasheet) |
| 腳位 3 | GND — Ground |
| 腳位 4 | OUT — LVDS true output |
| 腳位 5 | OUTn — LVDS complement output |
| 腳位 6 | VCON/NC — Voltage control port or NC depending on OTP profile (refer to family datasheet) |
典型應用
8N4SV75BC-0099CDI 適用於 6 應用s: Telecom Backplane Synchronization, FPGA and ASIC Reference Clock Generation, Industrial Networking Router/Switch Timing, Test and Measurement Instrumentation Cards, PCIe/SERDES Reference Clock Distribution, Server / Data Center Timing Cards.
Telecom Backplane Synchronization
The 8N4SV75BC-0099CDI FemtoClock VCXO delivers a 187.5 MHz LVDS reference ideal for telecom backplane timing cards. Its LVDS swing of ~350 mV over 100-ohm differential traces rejects common-mode noise from switching ASICs, while the family datasheet doc confirms sub-picosecond RMS jitter over 12 kHz to 20 MHz. Place a 0.1 uF ceramic within 3 mm of VDD and use an LDO such as the TPS7A4701 to keep the rail quiet. This combination suits IEEE 1588 boundary-clock and SyncE designs.
推薦
FPGA and ASIC Reference Clock Generation
FPGA designs feeding high-speed transceivers need a stable, low-jitter differential clock; the 8N4SV75BC-0099CDI provides factory-programmed LVDS at 187.5 MHz that drives Xilinx/Intel FPGA PLLs directly. Its 6-CLCC hermetic ceramic is solder-compatible with standard reflow, and the FemtoClock NG architecture handles the additive jitter that engineers previously solved with discrete VCXOs. Drive a global clock pin or MMCM/PLL input on the FPGA. Provide VDD via a low-noise regulator and place the AC-coupling caps near the FPGA inputs.
推薦
Industrial Networking Router/Switch Timing
Router and switch timing blocks need a tunable LVDS reference to feed SERDES and SyncE blocks; the 8N4SV75BC-0099CDI integrates the VCXO tuning port inside the FemtoClock NG family, removing the need for external PLL/VCO components. Its industrial -40C to +85C window, 6-CLCC hermetic package, and 3.3 V supply make it well suited to industrial Ethernet switches. Connect the LVDS pair to the SERDES reference input and route VC to a filtered DAC.
推薦
Test and Measurement Instrumentation Cards
The 8N4SV75BC-0099CDI is a good fit for test and measurement cards that need a precise, factory-programmed LVDS reference at 187.5 MHz with sub-ps jitter. The femtoclock architecture delivers repeatable spectral performance over the industrial temperature range, and its 6-CLCC hermetic outline is robust in vibration-prone environments. Use the LVDS output as a reference for the ADC clock and drive the VCXO tuning port from a filter DAC for line-locked acquisition.
推薦
PCIe/SERDES Reference Clock Distribution
PCI Express and 10/25/100G SERDES blocks benefit from a low-jitter LVDS reference; the 8N4SV75BC-0099CDI emits a factory-programmed 187.5 MHz LVDS with the FemtoClock NG low-jitter core. Drive a retimer or PCie clock buffer such as the DS80PCI102 from the LVDS pair, and isolate the LVDS traces with ground and 100-ohm differential impedance. The 3.3 V supply works seamlessly with mainstream PCIe timing chains.
推薦
Server / Data Center Timing Cards
Data center timing cards rely on a stable, low-jitter LVDS reference to drive timing fabrics; the 8N4SV75BC-0099CDI offers a factory-programmed 187.5 MHz LVDS source with sub-picosecond RMS jitter, fitting server backplanes and PTP grand master clocks. The 6-CLCC hermetic ceramic supports long-life server environments and the industrial temperature window; place the LDO close to VDD, AC-couple the LVDS pair at the SERDES, and confirm the LVDS pair meets IEEE 1588 jitter requirements.
推薦
推薦產品摘要
工程參考資料，適用於 8N4SV75BC-0099CDI — 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 | 8N4SV75BC-0094CDI8 | 8N4SV75BC-0098CDI8 | 8N4SV75BC-0100CDI8 | 8N4SV75BC-0099CDI8 | 8N4SV75FC-0099CDI |
|---|---|---|---|---|---|---|
| Package | 6-CLCC (7.0 x 5.0 mm) | 6-CLCC (same) | 6-CLCC (same) | 6-CLCC (same) | 6-CLCC (same) | 6-CLCC (same) |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Output Type | LVDS | LVDS | LVDS | LVDS | LVDS | LVDS |
| Output Frequency | 187.5 MHz | ~133 MHz (OTP variant) | ~160-170 MHz (OTP variant) | ~200 MHz (OTP variant) | ~187.5 MHz (variant) | ~187.5 MHz (variant) |
| Supply Voltage | 2.375 V to 3.465 V | 2.375 V to 3.465 V | 2.375 V to 3.465 V | 2.375 V to 3.465 V | 2.375 V to 3.465 V | 2.375 V to 3.465 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| RoHS / Lead-free | Yes (e3 Sn) | Yes (e3 Sn) | Yes (e3 Sn) | Yes (e3 Sn) | Yes (e3 Sn) | Yes (e3 Sn) |
| Programming Method | Factory OTP | Factory OTP | Factory OTP | Factory OTP | Factory OTP | Factory OTP |
主要差異化特點
- Factory OTP-programmed 187.5 MHz LVDS with FemtoClock NG PLL (對比8N4SV75BC-0099CDI8)
- Integrated VCXO tuning port with 50 ppm pull range class (對比8N4SV75FC-0099CDI)
- Hermetic 6-CLCC ceramic package with e3 matte-tin finish (對比Discrete VCXO + discrete PLL combo)
設計說明
Place a 10 uF bulk plus 0.1 uF ceramic within 3 mm of the VDD pin to keep VDD ripple below the LVDS jitter threshold of the FemtoClock NG core. Route the LVDS output pair over a continuous reference ground plane with 100-ohm differential impedance; avoid crossing splits under the pair. Family datasheet recommends shorted ground tie-pads to the ceramic for thermal sinking.
The LVDS pair must be AC-coupled at the receiver if the downstream SERDES/FPGA does not support LVDS common-mode; typical coupling caps in 1G SERDES links are 100 nF X7R positioned close to the receiver pins. Match trace lengths to < 25 mil skew to avoid duty-cycle distortion, and avoid vias on the LVDS pair when possible. Place a guard ground via fence around the pair to suppress common-mode pickup.
Estimated: phase jitter of the FemtoClock NG is dominated by the VDD rail; powering directly from a switching regulator can double RMS jitter versus a low-noise LDO. Each -CDI suffix is factory OTP-locked at a single carrier profile; never assume one variant can substitute for a different frequency code without recalculating downstream PLL ratios. Use only the frequency code indicated by the part marking.
Estimated: at 3.465 V supply and 100 ohm LVDS termination, power dissipation is around 110 mW; the 6-CLCC ceramic offers excellent thermal spreading but a connected thermal-pad copper pour is still recommended. Do not place large heat sources directly over the device in fully sealed enclosures; even ceramic packages benefit from moderate airflow at +85C ambient.
合規資訊
Lead-free per Renesas family datasheet (JESD-609 e3 Matte Tin). RoHS compliant per distributor listing. Halogen-free status not stated in available snippets; conflict minerals compliant per Renesas policy.
