VSC8256YMR - Quad 10G Repeater/Retimer | Microchip
MPN: VSC8256YMR ✓ نشطVSC8256YMR نظرة عامة
A repeater/retimer is a signal-integrity IC positioned between two serial endpoints to reduce timing uncertainty, recover degraded signals, and extend reliable communication over circuit-board channels. Within the semiconductor hierarchy, the VSC8256YMR belongs to the serial transceiver and interface-controller class rather than the general-purpose Ethernet PHY category. This distinction matters because the device is protocol-agnostic and focuses on physical-layer signal recovery rather than converting between conventional Ethernet media and a digital host interface.
The device supports four 1G/10G serial paths in one device, allowing a multiport system to use a consistent retiming architecture across parallel lanes. Its hardware-based host-side 10GBASE-KR auto-negotiation and training functions support link establishment over backplane-style electrical channels. Combining these functions in a compact FCBGA can reduce the number of separate repeater devices required in dense line-card and switching-platform designs while keeping signal timing behavior consistent among channels.
The 256-FCBGA package provides a high pin count suitable for four independent high-speed channels, their associated supply and ground connections, control interfaces, and configuration or reference connections. Dense ball-pitch packaging also demands careful PCB layout, short high-speed escape paths, controlled reference planes, and independent supply-return distribution. The package is intended for surface-mount assembly and is suited to multilayer boards designed specifically for multi-gigabit signal routing rather than simple two-layer prototyping.
Typical board-level uses include 10G Ethernet switching equipment, WAN and LAN interface line cards, telecom backplanes, and systems requiring protocol-independent signal recovery between endpoints. In these applications, the retimer can help compensate for connector, package, and PCB-channel losses while preserving deterministic link behavior. It is also relevant to equipment designers implementing four-lane 1G or 10G links where channel-to-channel timing consistency and training control are important design objectives.
Design teams should evaluate the complete channel path rather than treating the retimer as a standalone specification. Loss and jitter budgets, transmit and receive equalization, connector transitions, reference-clock quality, power sequencing, and the PCB stack-up determine whether a 10G channel closes reliably. Decoupling and power-plane design are particularly important in a 256-ball package because each high-speed retimer channel requires clean references and controlled return paths for dependable signal recovery.
This product page consolidates the manufacturer description, package information, sourcing details, application guidance, and pin-compatible family options into a concise engineering reference. It also highlights the distinction between protocol conversion, Ethernet media access, and true repeater/retimer functions to help designers select the correct device for high-speed board-level signal-integrity requirements.
بدائل مباشرة لـ VSC8256YMR — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
VSC8256YMR-01
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
VSC8256Y
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
VSC8256YM
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
VSC8256YMR المواصفات
| Product Type | Quad 1G/10G serial-to-serial repeater/retimer |
| Number of Channels | 4 channels |
| Supported Serial Data Rate | 1G or 10G per channel |
| Protocol Support | Protocol-agnostic |
| Ethernet Feature | Hardware-based host-side only 10GBASE-KR auto-negotiation and training |
| العلبة | 256-FCBGA, 17 x 17 mm |
| نوع التركيب | Surface mount |
| Device Category | Telecom interface IC / Ethernet interface IC |
| Number of Circuits | 4 circuits |
| Power-Supply Voltage | 1 V or 1.2 V |
| Maximum Data Rate | 10 Gbps per channel |
| نوع الواجهة | Serial Ethernet / SFI / XFI |
| Termination Count | 256 terminations |
دليل تكوين أطراف VSC8256YMR 256-fcbga, 17 x 17 mm
تكوين الأطراف لـ VSC8256YMR (حزمة 256-fcbga, 17 x 17 mm). يتم تعريف ترقيم الأطراف والوظائف ومخططات التوصيل في ورقة البيانات الفنية من الشركة المصنعة. راجعها للحصول على البصمة الدقيقة وإرشادات اللحام.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ VSC8256YMR.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
VSC8256YMR مناسب لـ 6 التطبيقs: 10G Ethernet Switching Equipment, WAN Interface Line Cards, LAN Interface Modules, Telecom Backplanes, Protocol-Agnostic Backplane Equalization, High-Density Network Appliance Boards.
10G Ethernet Switching Equipment
The VSC8256YMR fits 10G Ethernet switching equipment requiring four high-speed serial channels to recover and retime board-level links. Its four-channel 1G/10G configuration allows one device to support several parallel lanes instead of distributing retiming functions across multiple single-channel packages. According to the Microchip product page, the integrated host-side 10GBASE-KR auto-negotiation and training functions support link initialization, while protocol-agnostic operation makes the device useful across compatible link implementations. PCB design should preserve channel bandwidth with short impedance-controlled routes, continuous reference planes, low-inductance supply connections, and carefully modeled connector or package transitions.
موصى به
WAN Interface Line Cards
The VSC8256YMR is appropriate for WAN interface line cards that route several 1G or 10G serial links across a dense board. Each of its four channels can operate at 1G or 10G, helping designers standardize physical-layer signal recovery across differently provisioned ports. The protocol-agnostic architecture avoids coupling the retimer to a single packet protocol, while hardware-based 10GBASE-KR negotiation and training simplify host-side link establishment. For a line card, engineers should calculate the complete channel budget from connector, package, and PCB losses, then reserve enough margin for channel-to-channel variation and manufacturing tolerances.
موصى به
LAN Interface Modules
The VSC8256YMR can support compact LAN interface modules that need deterministic recovery of multiple high-speed serial links. Four integrated 1G/10G channels reduce the component count compared with four separate single-lane retimers, while the 17 x 17 mm 256-FCBGA preserves routing flexibility on a multilayer PCB. The device is especially relevant where cable, connector, or board-routing losses would otherwise impair a 10G link. Keep each high-speed lane electrically short, maintain continuous return paths, decouple each supply domain close to its pins, and validate channel performance with the exact connector and enclosure configuration used in production.
موصى به
Telecom Backplanes
The VSC8256YMR suits telecom backplanes requiring several board-level 10G links to cross long or lossy routing environments. Its four retiming channels can recover degraded signals at strategic locations on the backplane, while host-side 10GBASE-KR auto-negotiation and training establish operating conditions for compatible electrical channels. Protocol independence is valuable in telecom equipment because different line cards may use different service protocols while sharing the same physical retiming layer. The design must include a controlled stack-up, low-loss dielectric choices, appropriate via transitions, continuous planes, and simulation of the complete connector-to-retimer channel before placement is finalized.
موصى به
Protocol-Agnostic Backplane Equalization
The VSC8256YMR can be used when a backplane carries compatible high-speed links but does not require the retimer to interpret the upper-layer protocol. Its four 1G/10G channels provide parallel physical-layer recovery, and the integrated host-side 10GBASE-KR functions support link training where the channel standard applies. This separation between physical retiming and protocol handling lets designers reuse the same signal-integrity block across different traffic formats. Engineering validation should cover insertion loss, return loss, jitter tolerance, skew, power sequencing, reference-clock quality, and fault recovery at the temperatures and cable lengths required by the equipment.
موصى به
High-Density Network Appliance Boards
The VSC8256YMR fits high-density network appliance boards that combine many 10G-facing ports with limited board area. Four channels in one 256-FCBGA can reduce routing fragmentation and consolidate physical-layer link recovery in a multiport platform. Its low-power-oriented package is useful when every retimer contributes to total board power and thermal budget. The compact BGA still requires advanced assembly capability, a multilayer PCB, adequate ball-in-pad and soldermask design, and thermal analysis of neighboring Ethernet controllers. Signal and power integrity should be verified together because a retimer cannot compensate for an inadequately designed power-return path.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ VSC8256YMR — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | VSC8256YMR-01 | VSC8256Y | VSC8256YM |
|---|---|---|---|---|
| Package | 256-FCBGA (17 x 17 mm) | 256-FCBGA (17 x 17 mm) - same | 256-FCBGA (17 x 17 mm) - same | 256-FCBGA (17 x 17 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Number of Channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Supported Data Rate | 1G or 10G per channel | 1G or 10G per channel | 1G or 10G per channel | 1G or 10G per channel |
| Device Function | Serial-to-serial repeater/retimer | Serial-to-serial repeater/retimer | Serial-to-serial repeater/retimer | Serial-to-serial repeater/retimer |
أبرز الفروقات
- Four high-speed retiming channels in one device (مقابلVSC8256YMR-01)
- Protocol-independent physical-layer recovery (مقابلVSC8256Y)
- Integrated host-side 10GBASE-KR support (مقابلVSC8256YM)
ملاحظات التصميم
Design each 1G/10G channel as a complete transmission path from the transmitting device through connectors and package transitions to the VSC8256YMR input, and likewise for the output path. Use the manufacturer channel-loss, jitter, and return-loss limits to build the budget before layout. Keep the retimer close to the loss source when practical, minimize layer changes and stubs, and provide continuous reference planes beneath every high-speed route.
The 256-FCBGA requires a multilayer PCB with an assembly process capable of handling its fine pitch and high ball count. Follow the manufacturer land pattern, solder-mask, paste, and via recommendations exactly; do not substitute a generic 256-BGA footprint. Keep high-speed escape traces short, preserve symmetry between differential or controlled-impedance structures where applicable, and place decoupling and ground connections close to their associated device pins.
Evaluate each supported 1 V or 1.2 V supply domain for sequencing, droop, noise, and return-current continuity. Place local high-frequency decoupling at the appropriate package power and ground balls, and use additional bulk capacitance only where the manufacturer guidance or channel testing supports it. Confirm the reference-clock amplitude, frequency, jitter, and routing requirements from the datasheet because unstable clocking can prevent otherwise compliant data links from training.
Do not treat the VSC8256YMR as a substitute for an Ethernet PHY, MAC, or protocol converter. Its role is physical-layer repeater/retimer functionality. Verify the complete protocol stack, training support, channel type, electrical limits, and clock architecture before integration. Also confirm that VSC8256YMR-01, VSC8256Y, or VSC8256YM ordering codes have the required temperature range, qualification, lifecycle status, and production-test requirements.
معلومات الامتثال
Compliance declarations were not stated in the product-page and distributor records. Confirm RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status using the manufacturer's current product documentation and declarations.
