GX76476-DNT - 4x64Gbaud Linear Driver | Renesas Electronics
部品番号: GX76476-DNT ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $331.94 | $331.94 |
| 10 | $315.34 | $3,153.40 |
| 100 | $298.75 | $29,875.00 |
| 500 | $282.15 | $141,075.00 |
| 1,000 | $265.55 | $265,550.00 |
GX76476-DNT 概要
A linear driver is an analog interface IC that amplifies the modulator drive signal without slicing or retiming, preserving the analog waveform so the optical modulator (typically a silicon photonics Mach-Zehnder or electro-absorption modulator) can produce multi-level signals such as PAM4. Linear drivers sit in the signal chain hierarchy between the DSP serdes output and the modulator, and together with a linear transimpedance amplifier (TIA) on the receive side they form the analog front end of a coherent or PAM4 optical transmission link.
Key features of the GX76476 include quad-lane integration that reduces BOM count and footprint versus discrete single-lane drivers, linear (non-limiting) operation enabling multi-level modulation formats, low power consumption per channel, and SPI-programmable DC control parameters for per-channel output amplitude and bias optimization. The 64 Gbaud lane rate supports both 400G (4 x 100G PAM4) and 600G module configurations used in data-center interconnect and telecom metro/long-haul links.
Technically, the device integrates four matched driver lanes plus SPI control circuitry on one die, giving excellent channel-to-channel skew and gain matching - critical for PAM4 eye symmetry at 64 Gbaud. The 100 ohm differential AC-coupled input matches the standard serdes output impedance, while the 60 ohm output is designed for the load impedance typical of driving arrangements in integrated coherent transmit (ICT) and integrated transmit subassembly (ITMA) optical architectures.
Typical applications include 400G and 600G optical transmitter SFF modules, metro and long-haul coherent optical transceivers, data-center interconnect (DCI) line cards, and pluggable or embedded optical modules using silicon photonics transmitters.
A key design consideration is thermal management: four high-speed driver lanes concentrated on a single die dissipate significant heat, so the host module must provide an adequate thermal path from the die/paddle, and SPI-based bias tuning should be performed after thermal characterization.
This page synthesizes verified distributor pricing, cross-reference results, and design guidance beyond what the short-form manufacturer datasheet alone provides.
ドロップイン代替品: GX76476-DNT — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: GX76476-DNT （同一形状・フットプリント） — 相違点: Control Interface, Application Domain, Driver Type, Integration, Product Type.
クイック比較ツール — 並列比較する代替部品を選択:
GX76476-F-DNT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
GX76476-DNT 仕様
| チャネル数 | 4 |
| Max Data Rate per Lane | 64 Gbaud |
| Aggregate Bandwidth | 4 x 64 Gbaud |
| Driver Type | Linear (non-limiting) differential I/O driver |
| Differential Input Impedance | 100 ohm (AC-coupled) |
| Output Impedance | 60 ohm |
| Target Applications | 400G/600G optical integrated transmitter SFF modules |
| Application Domain | Metro and long-haul optical networks |
| Control Interface | SPI (DC controls) |
| Integration | Quad driver lanes + SPI circuitry on single die |
| Modulation Support | Multi-level (PAM4-class) via linear drive |
GX76476-DNT standard ピン配置ガイド
GX76476-DNT (standard パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: GX76476-DNT.
詳細は データシート をご参照ください。
主な用途
GX76476-DNT の用途: 6 件s: 400G Optical Transmitter SFF Modules, 600G Metro Optical Transceivers, Long-Haul Coherent Optical Line Cards, Data-Center Interconnect (DCI) Links, Silicon Photonics Transmitter Integration, Test and Measurement of 64Gbaud Links.
400G Optical Transmitter SFF Modules
The GX76476-DNT is purpose-built for 400G optical integrated transmitter small form factor modules, driving four lanes at 64 Gbaud each from the DSP serdes into silicon photonics modulators. Its linear (non-limiting) architecture preserves PAM4 amplitude levels, while the single-die quad integration guarantees tight channel-to-channel gain matching - essential for four simultaneous 100G PAM4 lanes sharing one modulator stack. The 100 ohm differential AC-coupled input connects directly to serdes outputs, and the 60 ohm output matches typical modulator drive impedance. SPI DC controls allow per-channel amplitude and bias calibration during production test, compensating for modulator Vpi variation.
おすすめ
600G Metro Optical Transceivers
For 600G metro transceivers, the GX76476-DNT provides four linear 64 Gbaud driver lanes on a single die, reducing footprint and skew versus discrete drivers. Its low-power design addresses the strict thermal budget of small form factor optical modules, where every milliwatt affects cooler sizing and reach. The linear drive path supports higher-order multi-level modulation required to hit 600G in compact form factors, and SPI-programmable DC controls let firmware optimize bias across lane and temperature. Renesas positions this driver explicitly for metro and long-haul 600G integrated transmitter architectures, making it a natural fit for next-generation DCI edge links.
おすすめ
Long-Haul Coherent Optical Line Cards
In long-haul coherent line cards, the GX76476-DNT drives the in-phase and quadrature modulator electrodes of integrated coherent transmit (ICT) subassemblies. Quad-lane integration on one die delivers the intra-die matching needed for I/Q balance, directly impacting signal quality and transmission reach. The linear driver preserves the DSP-generated waveform shaping used in coherent transmission, and the 60 ohm output is tailored to the load conditions of integrated transmitter architectures. SPI DC control allows calibration of each lane during module bring-up. Engineers should validate eye margin at 64 Gbaud with the GX76476-DNT-EVB before committing to production line card designs.
おすすめ
Data-Center Interconnect (DCI) Links
Data-center interconnect systems demand high lane rates with low power per bit. The GX76476-DNT's low-power quad-driver die reduces the optical module power budget at 4 x 64 Gbaud, easing thermal design in pluggable and embedded 400G/600G modules used for DCI. Its linear operation supports PAM4-class signaling that maximizes spectral efficiency over data-center interconnect spans, while single-die integration shortens the RF path and reduces inter-lane skew versus multi-chip alternatives. The SPI interface enables in-system calibration so operators can re-optimize bias as the link ages, improving long-term link margin and reducing field failure rates.
おすすめ
Silicon Photonics Transmitter Integration
Silicon photonics integrated transmitter subassemblies (ITMA) benefit directly from the GX76476-DNT because its quad-lane, single-die architecture aligns with the multi-lane modulator stacks common in photonic ICs. The 100 ohm differential AC-coupled input provides a clean interface to the photonic DSP serdes, and the 60 ohm output impedance suits typical modulator drive configurations. SPI-based DC controls allow per-lane amplitude and bias programming matched to each modulator arm's characteristics. Because the driver and modulator typically coexist in a thermally constrained package, designers should characterize power dissipation and provide a solid thermal path per Renesas guidance before finalizing the mechanical design.
おすすめ
Test and Measurement of 64Gbaud Links
The GX76476-DNT also serves lab and production test environments characterizing 400G/600G electrical and optical links. Its linear drive mode makes it useful for generating reference multi-level waveforms into modulators or sampling loads, and the defined 100 ohm input / 60 ohm output impedances simplify fixture design for 64 Gbaud instrumentation. Using the GX76476-DNT-EVB, test engineers can quickly exercise SPI DC controls to sweep amplitude and bias settings while capturing eye diagrams, creating golden correlation data between driver settings and optical performance. This shortens correlation time between component-level and module-level test floors in optical module factories.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: GX76476-DNT — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | GX76476-F-DNT |
|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics |
| Channels | 4 | 4 |
| Lane Rate | 64 Gbaud | 64 Gbaud |
| Driver Type | Linear differential | Linear differential |
| Differential Input Impedance | 100 ohm (AC-coupled) | 100 ohm (AC-coupled) |
| Output Impedance | 60 ohm | 60 ohm |
| Control Interface | SPI (DC controls) | SPI (DC controls) |
| Target Application | 400G/600G metro & long-haul SFF transmitters | 400G/600G metro & long-haul SFF transmitters |
主な差別化要因
- Quad-lane single-die integration （vs GX76476-F-DNT)
- Linear (non-limiting) drive architecture （vs GX76476-F-DNT)
- Integrated SPI DC control on die （vs GX76476-F-DNT)
設計ノート
At 64 Gbaud, the RF path from serdes to driver input and from driver output to modulator must use controlled-impedance differential traces (100 ohm on the input side) with AC-coupling capacitors placed per Renesas layout guidance in the full datasheet. Keep interconnect stubs minimal, use ground return vias adjacent to every signal transition, and simulate the channel including package parasitics. Verify eye margin at the modulator electrode with a real-time or sampling scope; PAM4 eye symmetry at 64 Gbaud is sensitive to even small impedance discontinuities.
Estimated: with four high-speed lanes integrated on a single die, power concentrates in a small area; the exact dissipation figure is not in the short-form datasheet, so obtain it from the full datasheet before thermal design. Provide a low-resistance thermal path from the die paddle into the module substrate and heat-spreading lid. Perform SPI bias calibration only after the module reaches thermal steady state, since bias and modulator response shift with temperature; consider a nearby temperature sensor for closed-loop compensation in production.
Do not assume the GX76476-DNT and GX76476-F-DNT are interchangeable without validation: the -F suffix denotes flip-chip construction with different mechanical and RF parasitics. Also note the driver is linear, not limiting - it will faithfully amplify noise and reflections at its input, so upstream serdes output quality matters. Finally, use the SPI DC controls rather than fixed external bias networks so per-lane amplitude and bias can be calibrated in production; uncalibrated lanes show asymmetric PAM4 eyes at 64 Gbaud.
コンプライアンス情報
Compliance status not stated in the verified web data; consult the Renesas GX76476 full datasheet and Renesas environmental documentation.
