BCM8706BIFBG - 10GBASE-LRM XAUI Transceiver | Broadcom
Référence : BCM8706BIFBG ✗ Fin de vieBCM8706BIFBG Présentation
A 10GBASE-LRM transceiver is a high-speed optical-interface component used to connect a host or switching ASIC to a multimode optical link. LRM denotes a link-optimized multimode format, while XAUI describes the wide parallel interface traditionally used between networking silicon and an optical module. The BCM8706BIFBG therefore serves as an interface bridge within a larger optical transceiver assembly rather than as a general-purpose logic IC.
The confirmed headline characteristics are a 10GBASE-LRM signal path, XAUI-to-serial conversion, interface-transceiver functionality, and a 256-pin FBGA package. These features place the component in demanding Ethernet equipment such as switches, routers, line cards, and network-interface controllers. Its high pin count and fine-pitch BGA construction also require a PCB and assembly process designed for controlled fanout, inspection, and thermal performance.
Technically, this part belongs to the transceiver and DSP-oriented interface IC category. A complete signal-chain design must account for the required XAUI input signals, serial output behavior, reference-clock expectations, supply rails, configuration controls, and the package's thermal and layout requirements. The manufacturer datasheet should be used as the controlling source for electrical limits, timing, lane behavior, pin assignments, and recommended power and decoupling networks.
Typical BCM8706BIFBG applications include 10-Gigabit Ethernet switching systems, router interfaces, server network-interface modules, optical backplanes, and telecommunications aggregation equipment. In these systems, the transceiver can reduce the number of external high-speed copper links by accepting XAUI data from a switching or routing ASIC before the signal is converted for the appropriate serial link.
The most important design consideration is package-aware implementation. A 256-pin FBGA cannot be treated like a generic exposed-pad package: its many supply, ground, signal, and configuration pins must follow the manufacturer's reference layout and pinout exactly. Power and ground distribution, return paths, clock routing, decoupling, and thermal management should therefore be developed together rather than added after schematic capture.
This page combines the confirmed product identity and package information with an explicit data-completeness review, practical high-speed PCB guidance, sourcing-focused answers, and a conservative drop-in replacement assessment. Every unconfirmed electrical, timing, compliance, pin-level, and lifecycle parameter is marked for engineering verification rather than estimated.
Alternatives de remplacement direct pour BCM8706BIFBG — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesBCM8706BIFBG Valeurs maximales et caractéristiques électriques
| Product Type | XAUI-to-serial 10GBASE-LRM transceiver |
| Nominal Data Rate | 10 Gb/s |
| Interface | XAUI to serial |
| Network Standard | 10GBASE-LRM |
| Catégorie | Interface IC |
| Boîtier | 256-pin FBGA |
| Nombre de broches | 256 pins |
| Type de montage | Surface mount |
Guide de configuration des broches du BCM8706BIFBG 256-pin fbga
Configuration des broches du BCM8706BIFBG (boîtier 256-pin fbga). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour BCM8706BIFBG.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
BCM8706BIFBG convient pour 6 applications: 10-Gigabit Ethernet Switching, Router and Aggregation Interfaces, Server Network-Interface Modules, Optical Backplane Interconnect, Telecommunications Line Cards, Industrial Network Gateways.
10-Gigabit Ethernet Switching
The BCM8706BIFBG fits a 10-Gigabit Ethernet switch line card because it provides the XAUI-to-serial conversion needed for a 10GBASE-LRM optical link. A switching ASIC can present parallel XAUI traffic to the transceiver, while the surrounding module supplies the required clocking, signal conditioning, optical interface, and power delivery. The confirmed 10 Gb/s operating role and 256-pin FBGA make it appropriate for dense switching platforms. Final deployment still depends on confirming lane count, electrical limits, timing, reference-clock requirements, thermal performance, and the manufacturer pinout. PCB implementation must preserve high-speed return paths and place decoupling and clock-support components according to the reference design.
Recommandé
Router and Aggregation Interfaces
The BCM8706BIFBG is applicable to router and packet-aggregation interfaces where a host ASIC uses XAUI and the line card needs a 10GBASE-LRM serial path. The device can serve as the dedicated high-speed transceiver around the routing or aggregation silicon, reducing the number of direct serial links handled by the host. Its 256-pin FBGA supports integration with a dense line-card layout, but the design must account for hundreds of package connections and the exact pin map. Verification should include lane mapping, clock quality and jitter, shutdown behavior, supply sequencing, signal-loss handling, and thermal performance. Optical and copper channel compliance must be demonstrated separately rather than inferred from the transceiver description.
Recommandé
Server Network-Interface Modules
The BCM8706BIFBG can be evaluated for a server network-interface module that accepts XAUI from a host controller and converts it into a 10GBASE-LRM serial optical path. Its dedicated transceiver function can isolate the high-speed conversion stage from the server's general-purpose processing and simplify a modular NIC architecture. The 256-pin FBGA requires careful escape routing from the central die region, and the assembly process must support fine-pitch BGA inspection. Before schematic approval, confirm the exact interface width, operating clock, supply rails, electrical thresholds, latency expectations, and configuration method in the Broadcom datasheet. The complete module should also validate heat dissipation, optical power, link training or startup behavior, and electromagnetic compatibility.
Recommandé
Optical Backplane Interconnect
The BCM8706BIFBG is a candidate for an optical-backplane architecture in which parallel XAUI traffic from an ASIC is converted for a 10GBASE-LRM channel. Backplane use demands tight control of insertion loss, return loss, skew, jitter, connector behavior, and channel reach; the transceiver marking alone does not guarantee compliance. Place the device so the high-speed XAUI and serial routes have continuous reference planes and minimal branch stubs. Use the manufacturer's recommended layer stack, decoupling topology, and clock routing to control deterministic and random jitter. Thermal analysis should include the BGA's coupled heat flow through the PCB, while channel simulation and hardware eye testing should validate the completed link rather than only the IC.
Recommandé
Telecommunications Line Cards
The BCM8706BIFBG can support a telecommunications line-card design that connects packet-processing silicon to a 10GBASE-LRM optical path. The dedicated transceiver function provides a defined conversion boundary between parallel XAUI and serial link circuitry, allowing the switching or transport ASIC to remain focused on packet processing. For line-card implementation, confirm the exact number of XAUI lanes, supported data rate, clock architecture, operating-temperature limits, and fault-reporting behavior before layout release. The 256-pin FBGA requires an assembly process capable of handling dense ball spacing, and the power network must supply the specified rails without excessive impedance. Conduct system-level eye, jitter, BER, temperature, and power-integrity testing because individual IC operation does not establish link margin.
Recommandé
Industrial Network Gateways
The BCM8706BIFBG may fit an industrial network gateway that bridges a high-throughput processing ASIC to a 10GBASE-LRM optical uplink. Its dedicated high-speed interface can provide a structured XAUI-to-serial boundary in systems requiring reliable Ethernet backhaul. Industrial use makes operating-temperature qualification, long-term availability, transient robustness, and lifecycle status important, so those attributes must be confirmed from Broadcom documentation rather than assumed. The design should provide isolated or protected external connections as required by the installation environment while preserving the integrity of the internal high-speed links. Thermal analysis, conducted-emissions testing, ESD protection, and a controlled BGA assembly process are essential because industrial gateways may operate continuously in sealed enclosures with limited cooling.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour BCM8706BIFBG — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Brand | Broadcom |
| Package | 256-pin FBGA |
| Product Type | Interface transceiver IC |
| Interface | XAUI to serial |
| Network Standard | 10GBASE-LRM |
| Nominal Data Rate | 10 Gb/s |
| Pin Count | 256 pins |
| Mounting Type | Surface mount |
Principaux différenciateurs
- Dedicated 10GBASE-LRM conversion function (vs General-purpose interface ICs)
- High-density integrated transceiver packaging (vs Discrete serial-interface assemblies)
- Established Broadcom networking orientation (vs Unrelated transceiver vendors)
Notes de conception
Implement the BCM8706BIFBG land pattern directly from the exact Broadcom package drawing and pin-description table. A 256-pin FBGA generally requires via-in-pad or closely placed escape structures, multiple power and ground planes, and a controlled-impedance stackup. Keep the ball map, mask layers, solder-mask definitions, paste apertures, and assembly stencil mutually consistent, and verify courtyard clearance around neighboring components.
Route XAUI and serial outputs as short, continuous, impedance-controlled paths with uninterrupted reference planes. Avoid stubs, test pads, and layer transitions in critical nets unless the manufacturer reference design includes them. Maintain the specified clock and power distribution topology, control impedance variation across the BGA escape region, and perform signal-integrity simulation with realistic package and connector models before releasing the board.
Estimate junction temperature from actual board copper, adjacent heat sources, airflow, and enclosure temperature rather than relying on a generic package rating. Spread high-current supply and ground connections across multiple BGA balls as specified, provide thermal vias beneath the package where recommended, and use thermal imaging or a detailed model to identify local hot spots. Validate operation at the highest ambient temperature and worst-case data-loading condition.
Informations de conformité
The current product information does not state environmental or automotive compliance for the exact BCM8706BIFBG ordering code. Obtain compliance documentation from Broadcom before production release.
