8SLVP1212ANLGI - 2:12 LVPECL Fanout Buffer, 2 GHz | Renesas
料号： 8SLVP1212ANLGI ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.05 | $130.50 |
| 100 | $11.6 | $1,160.00 |
| 500 | $10.44 | $5,220.00 |
| 1,000 | $9.28 | $9,280.00 |
8SLVP1212ANLGI 概述
What is a clock fanout buffer? It is a clock distribution IC that replicates a single reference clock across multiple outputs while preserving edge fidelity, skew, and phase noise. Fanout buffers sit between a clock source (crystal oscillator, PLL, or upstream serializer) and downstream loads (FPGA transceivers, ADC/DAC sample clocks, switch fabric, DSP cores), forming a tier of the broader clock-tree hierarchy: clock source -> fanout buffer -> clocked loads. Their primary engineering value is guaranteeing output-to-output skew, part-to-part skew, and additive jitter so that multi-channel systems stay synchronized.
Key features of the 8SLVP1212ANLGI include guaranteed low output-to-output skew, very low additive phase noise for high-frequency clock distribution, internal termination on LVPECL inputs for impedance matching, and an operating temperature range of -40 °C to +85 °C. The differential LVPECL I/O swings (~800 mV) reject common-mode noise on the clock traces, which is essential across long PCB routes in multi-board chassis. Power consumption is dominated by the twelve LVPECL output drivers; the exposed-pad package is required for continuous full-load operation.
Typical applications include clock distribution in high-speed telecommunications line cards, multi-channel ADC/DAC sampling systems, FPGA reference clock networks, storage area network (SAN) switches, and high-end test-and-measurement instrumentation. When laying out the PCB, place the device close to the clock source to minimize input trace length, route the LVPECL outputs as 100 Ω differential pairs, and stitch the VFQFN-EP exposed pad with multiple thermal vias for thermal relief under maximum load. This page synthesizes distributor pricing, drop-in alternatives, and PCB layout guidance not found in the manufacturer datasheet.
直接替换替代料： 8SLVP1212ANLGI ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
8SLVP1212ANLGI/W
✅ 直接替换📋 参考替代料（不在目录中）
8SLVP1212ANLGI8
✅ 直接替换📋 参考替代料（不在目录中）
8SLVP1212ANLGI 规格参数
| 功能 | Clock Fanout Buffer (Distribution) |
| Input:Output Ratio | 2:12 (differential input -> 12 differential LVPECL outputs) |
| 输出类型 | LVPECL (differential) |
| Input Type | LVPECL (differential) |
| Maximum Toggle Frequency | 2 GHz |
| 电源电压 | 3.3 V or 2.5 V |
| 输出数量 | 12 (6 differential pairs) |
| Input Termination | Internal LVPECL termination |
| 工作温度范围 | -40 °C to +85 °C |
| 封装 | 40-VFQFN Exposed Pad (NLG, 6 mm × 6 mm) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
8SLVP1212ANLGI 引脚配置
| 引脚 1 | Q0 — LVPECL differential output 0 (true) |
| 引脚 2 | Q0B — LVPECL differential output 0 (complement) |
| 引脚 3 | VCC — Power supply (3.3 V or 2.5 V) |
| 引脚 4 | Q1 — LVPECL differential output 1 (true) |
| 引脚 5 | Q1B — LVPECL differential output 1 (complement) |
| 引脚 6 | GND — Ground |
| 引脚 7 | Q2 — LVPECL differential output 2 (true) |
| 引脚 8 | Q2B — LVPECL differential output 2 (complement) |
| 引脚 9 | Q3 — LVPECL differential output 3 (true) |
| 引脚 10 | Q3B — LVPECL differential output 3 (complement) |
| 引脚 11 | VCC — Power supply (3.3 V or 2.5 V) |
| 引脚 12 | Q4 — LVPECL differential output 4 (true) |
| 引脚 13 | Q4B — LVPECL differential output 4 (complement) |
| 引脚 14 | GND — Ground |
| 引脚 15 | Q5 — LVPECL differential output 5 (true) |
| 引脚 16 | Q5B — LVPECL differential output 5 (complement) |
| 引脚 17 | Q6 — LVPECL differential output 6 (true) |
| 引脚 18 | Q6B — LVPECL differential output 6 (complement) |
| 引脚 19 | VCC — Power supply (3.3 V or 2.5 V) |
| 引脚 20 | Q7 — LVPECL differential output 7 (true) |
| 引脚 21 | Q7B — LVPECL differential output 7 (complement) |
| 引脚 22 | GND — Ground |
| 引脚 23 | Q8 — LVPECL differential output 8 (true) |
| 引脚 24 | Q8B — LVPECL differential output 8 (complement) |
| 引脚 25 | Q9 — LVPECL differential output 9 (true) |
| 引脚 26 | Q9B — LVPECL differential output 9 (complement) |
| 引脚 27 | VCC — Power supply (3.3 V or 2.5 V) |
| 引脚 28 | Q10 — LVPECL differential output 10 (true) |
| 引脚 29 | Q10B — LVPECL differential output 10 (complement) |
| 引脚 30 | GND — Ground |
| 引脚 31 | Q11 — LVPECL differential output 11 (true) |
| 引脚 32 | Q11B — LVPECL differential output 11 (complement) |
| 引脚 33 | VCC — Power supply (3.3 V or 2.5 V) |
| 引脚 34 | CLK_IN — LVPECL differential clock input (true) |
| 引脚 35 | CLK_INB — LVPECL differential clock input (complement) |
| 引脚 36 | GND — Ground |
| 引脚 37 | NC — Not connected (per datasheet) |
| 引脚 38 | NC — Not connected (per datasheet) |
| 引脚 39 | NC — Not connected (per datasheet) |
| 引脚 40 | NC — Not connected (per datasheet) |
典型应用
8SLVP1212ANLGI 适用于 6 应用s: FPGA Reference Clock Distribution, High-Speed ADC/DAC Sampling Clock Network, Telecom Line Card Clock Fanout, Storage Area Network Switch Fabric Clocking, Test & Measurement Instrumentation, Server Motherboard Clock Distribution.
FPGA Reference Clock Distribution
The 8SLVP1212ANLGI distributes a single low-jitter reference clock across up to 12 LVPECL loads feeding FPGA transceiver banks, GT/GX clock pins, and fabric clock trees. With 2 GHz toggle rate and very low additive phase noise, it preserves the source oscillator's spectral purity while minimizing deterministic jitter. The 40-VFQFN-EP exposed pad enables reliable thermal dissipation when all 12 outputs drive 100 Ω differential lines. Recommended companion MPNs: SI53112-A00AGM (clock multiplier), 88X5113-A1-BVW4C000 (PHY needing reference clock).
推荐
High-Speed ADC/DAC Sampling Clock Network
The 8SLVP1212ANLGI provides low-skew LVPECL sampling clocks to multi-channel ADC and DAC arrays in radar, software-defined radio, and instrumentation systems. Its guaranteed output-to-output skew keeps inter-channel phase mismatch minimal, which directly improves beamforming accuracy and spurious-free dynamic range. The 3.3 V/2.5 V supply flexibility allows direct interfacing with mixed-voltage ADC clock inputs. Recommended companion MPNs: 24LC512T-I/SM (calibration EEPROM), KSZ9893RNXI (Ethernet switch for data backhaul).
推荐
Telecom Line Card Clock Fanout
In SONET/SDH, OTN, and Ethernet line cards, the 8SLVP1212ANLGI replicates a backplane reference clock to multiple framer/mapper ASICs, mappers, and SERDES channels. Its 2 GHz toggle capability supports 10G/25G/100G SERDES reference requirements, while internal LVPECL input termination eliminates the need for external resistor networks. Operating across -40 °C to +85 °C, it satisfies the industrial temperature range typical of telecom outdoor equipment. Recommended companion MPNs: KSZ9893RNXI (managed Ethernet switch), PIC32MZ2048EFM144T-I/PL (control plane MCU).
推荐
Storage Area Network Switch Fabric Clocking
The 8SLVP1212ANLGI distributes low-jitter clocks to PCIe switch fabrics, SAS expander chips, and NVMe controller ASICs in storage area network switches and RAID arrays. Its 12 LVPECL outputs can drive multiple switch chips with deterministic skew, ensuring consistent link-training timing across all lanes. The exposed-pad VFQFN package supports continuous operation in thermally constrained 1U chassis. Recommended companion MPNs: PIC32MZ2048ECM100T-I/PT (storage controller MCU), AP63205WU-7 (point-of-load DC-DC).
推荐
Test & Measurement Instrumentation
The 8SLVP1212ANLGI serves as a precision clock fanout in oscilloscopes, signal analyzers, and arbitrary waveform generators. Its low additive phase noise preserves the integrity of synthesized or recovered signals under test, while 12 outputs allow a single source to drive multiple internal digitizers and DACs simultaneously. The part-to-part skew guarantee ensures instrument-to-instrument timing correlation in production test racks. Recommended companion MPNs: MCP6S28-I/SL (programmable gain amp for signal conditioning), 24FC1025-I/SN (instrument calibration storage).
推荐
Server Motherboard Clock Distribution
The 8SLVP1212ANLGI drives multiple PCIe slots, memory controllers, and BMC chips from a single server-board reference clock. Its LVPECL signaling rejects common-mode noise across the backplane, while the small 6 mm × 6 mm VFQFN-EP footprint conserves board area versus discrete buffer arrays. Operating up to 2 GHz, it supports PCIe Gen5/Gen6 reference-clock rates. Recommended companion MPNs: PIC32MZ2048EFH100T-I/PT (BMC MCU), AP63205WU-7 (point-of-load regulator).
推荐
推荐产品汇总
工程参考数据： 8SLVP1212ANLGI ——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 | 8SLVP1212ANLGI/W | 8SLVP1212ANLGI8 |
|---|---|---|---|
| Package | 40-VFQFN Exposed Pad (NLG) | 40-VFQFN Exposed Pad (NLG) | 40-VFQFN Exposed Pad (NLG) |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Function | 2:12 LVPECL Fanout Buffer | 2:12 LVPECL Fanout Buffer | 2:12 LVPECL Fanout Buffer |
| Number of Outputs | 12 (differential LVPECL) | 12 (differential LVPECL) | 12 (differential LVPECL) |
| Maximum Toggle Frequency | 2 GHz | 2 GHz | 2 GHz |
| Supply Voltage | 3.3 V or 2.5 V | 3.3 V or 2.5 V | 3.3 V or 2.5 V |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Packaging Form | Tray / cut tape | Tape & Reel | Tape & Reel |
关键差异点
- Twelve LVPECL outputs from one differential input pair （对比 Standard 1:4 or 1:8 clock buffers)
- 2 GHz toggle rate with very low additive phase noise （对比 General-purpose CMOS clock buffers)
- Internal LVPECL input termination （对比 Discrete LVPECL buffers requiring external bias resistors)
设计说明
Route all 12 LVPECL outputs as 100 Ω differential pairs with tightly matched lengths; target intra-pair skew under 5 mils and pair-to-pair skew under 50 mils to meet the datasheet output-to-output skew budget. Place the 8SLVP1212ANLGI close to the upstream reference oscillator or PLL to minimize the input trace length and avoid coupling noise from adjacent aggressors. Use series AC-coupling capacitors near the driver end of each output pair as recommended by LVPECL interface practice.
Estimated: With all 12 LVPECL outputs driving 100 Ω loads at 2 GHz, total power dissipation is dominated by output-driver current; the VFQFN-EP exposed pad must be soldered directly to a large copper pour stitched with multiple thermal vias to the internal ground plane. Without the thermal pad soldered, junction temperature can exceed 125 °C under full output load. Always follow the Renesas PCB layout recommended land pattern exactly.
Decouple each VCC pin with a 0.1 µF low-ESL ceramic capacitor placed within 100 mils of the pin; add a single 10 µF bulk capacitor near the supply entry point. The 8SLVP1212ANLGI supports both 3.3 V and 2.5 V operation from the same pins, but mixing supply voltages between VCC rails on the same part is not permitted - all VCC pins must operate at the same nominal voltage.
Do not leave the LVPECL complementary outputs floating; both Qn and QnB must be terminated to provide the bias current path. Missing terminations cause output stage oscillation and can damage the device. Avoid routing LVPECL outputs over splits in the reference planes - reference plane transitions introduce common-mode noise that LVPECL cannot fully reject.
合规信息
RoHS and REACH compliant per Renesas product page. Industrial temperature grade (-40 °C to +85 °C); not AEC-Q100 qualified - this part targets commercial and industrial, not automotive. Halogen-free and lead-free per Renesas compliance disclosures.
