BCM5389IFBG - 8-Port Gigabit Ethernet Switch | Broadcom
N.º de pieza: BCM5389IFBG ✓ ActivoBCM5389IFBG Descripción general
An Ethernet switch is a semiconductor that forwards Ethernet frames between connected ports using dedicated MAC addresses. The BCM5389IFBG belongs to the Ethernet switch hierarchy, where it integrates multiple physical-layer-facing SerDes interfaces with frame-processing logic. This consolidation allows a router, gateway, or subnet switch to support multiple Gigabit Ethernet links without requiring eight separate external switch devices. Its integrated SerDes also reduces board-level interconnect requirements compared with solutions using discrete PHY components.
Key features include eight Gigabit Ethernet ports, eight SGMII/SerDes interfaces, one selectable GMII, RGMII, or RvMII interface, and nine compliant MACs. The device supports 128 KB of packet buffering and 9 KB jumbo frames. According to the Broadcom datasheet indexed by the verified sources, it complies with IEEE 802.3u, IEEE 802.3ab, and IEEE 802.3x, including MAC control, pause-frame, and autonegotiation behavior. These standards provide the foundation for Fast Ethernet, Gigabit Ethernet, flow control, and compatible network interoperability.
The eighth-generation switch-on-chip architecture is intended to reduce the external component count of multiport network products. Eight integrated SerDes interfaces can expose copper or optical network links through suitable PHY or transceiver circuitry, while the GMII/RGMII/RvMII interface connects the switching system to a host processor or uplink controller. The 256-pin FBGA package supports high-density routing but requires careful escape-routing and via-in-pad or fanout-aware PCB construction.
Typical applications include SOHO routers, residential gateways, Ethernet subnet switches, network appliances, and industrial or embedded systems that aggregate multiple Gigabit Ethernet links. The 1.2 V supply and integrated SerDes can simplify power-tree design and reduce PCB area, but the high-density BGA package, multi-rail sequencing requirements, and high-speed signal integrity demands careful reference-plane continuity, decoupling, and connector-return-path planning.
The principal design challenge is preserving signal integrity across the short, dense escape paths between the FBGA device and external PHY, magnetics, and connector hardware. Differential SerDes routing should use a continuous reference plane, controlled impedance, minimal stubs, and tightly placed decoupling. Differential pair geometry, via transitions, and return paths must be validated with the actual PCB stack-up and connector models.
This page consolidates verified Broadcom and distributor information into an application-oriented engineering summary, including the switch architecture, interface hierarchy, package implications, design cautions, and the one same-family drop-in candidate supported by the supplied cross-reference evidence. Pricing and lead time remain distributor-dependent and should be confirmed for the requested quantity as of the current sourcing date.
Alternativas directas para BCM5389IFBG — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con BCM5389IFBG (mismo factor de forma y huella) — difiere en Mounting Type, Package, Product Type.
BCM5389KFBG
✅ Sustitución directaConsulte el precio
Ver hoja de datos →BCM5389IFBG Valores máximos y características eléctricas
| Product Type | 8-port Gigabit Ethernet switch with integrated SerDes |
| Number of Gigabit Ethernet Ports | 8 ports |
| Number of MACs | 9 MACs |
| Host Interface | 1 GMII, RGMII, or RvMII interface |
| Serial Interface | 8 SGMII/SerDes interfaces |
| Packet Buffer | 128 KB |
| Maximum Jumbo Frame | 9 KB |
| Tensión de alimentación de funcionamiento | 1.2 V |
| Encapsulado | 256-pin FBGA |
| Tipo de montaje | SMD/SMT surface mount |
| Terminal Form | Ball |
| Package Shape | Square |
| Temperature Grade | Industrial |
| IEEE Standards | IEEE 802.3u, IEEE 802.3ab, and IEEE 802.3x |
| Flow Control Support | Pause frame support |
| Autonegotiation Support | Yes |
| MAC Control Support | IEEE 802.x-compliant MAC control |
| Moisture Sensitivity | Moisture sensitive |
Guía de configuración de pines de BCM5389IFBG square
Configuración de pines para BCM5389IFBG (encapsulado square). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para BCM5389IFBG.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
BCM5389IFBG es adecuado para 6 aplicacións: SOHO Router, Residential Gateway, Ethernet Subnet Switch, Industrial Network Appliance, Network Monitoring Equipment, Embedded Network Platform.
SOHO Router
BCM5389IFBG fits a SOHO router that needs eight local Gigabit Ethernet ports and one processor-facing uplink. Its eight SGMII/SerDes interfaces can connect external Gigabit PHYs, while the GMII/RGMII/RvMII interface provides a parallel path to a network processor. The 128 KB packet buffer helps absorb burst traffic, and the 1.2 V operating supply supports a compact power tree. Board design should reserve controlled-impedance routing for every SerDes pair and use a continuous ground reference beneath the 256-pin FBGA.
Recomendado
Residential Gateway
BCM5389IFBG is suitable for a residential gateway that aggregates multiple wired Ethernet connections behind one uplink. Eight integrated SerDes channels reduce the number of separate external switching devices, while nine MACs and 128 KB of packet memory support centralized frame handling. Its support for pause frames and autonegotiation improves behavior with congested uplinks and mixed-speed equipment. The 256-ball package requires dense fanout routing, and the 1.2 V rail should be filtered close to the device with local bulk and high-frequency decoupling.
Recomendado
Ethernet Subnet Switch
BCM5389IFBG can serve as the central switching device in an eight-port Gigabit Ethernet subnet switch. Each SGMII/SerDes interface can feed a suitable copper PHY or transceiver, while the GMII/RGMII/RvMII interface offers an additional system-facing connection. The 128 KB packet buffer and 9 KB jumbo-frame support are useful for traffic bursts and large local frames, while IEEE 802.3x pause-frame handling supports flow control. Layout must minimize SerDes stub effects and maintain uninterrupted return paths beneath the FBGA.
Recomendado
Industrial Network Appliance
BCM5389IFBG is a candidate for industrial network appliances requiring eight integrated Gigabit Ethernet links and an industrial temperature grade. The switch-on-chip architecture can reduce the component count compared with multiple discrete switching blocks, while 128 KB of packet buffering supports bursty network traffic. The 1.2 V operating supply is useful for compact multi-rail designs, but exact temperature limits, isolation, and qualification evidence are not present in the supplied excerpts and must be verified before industrial deployment.
Recomendado
Network Monitoring Equipment
BCM5389IFBG can support a network monitoring or aggregation appliance that observes multiple Gigabit Ethernet segments. Eight SerDes interfaces provide parallel link access, while the host-facing GMII/RGMII/RvMII interface can transfer traffic toward a monitoring processor. The 128 KB buffer can smooth short traffic surges, and 9 KB jumbo-frame support accommodates larger payloads where the rest of the system supports them. High-density BGA routing should be co-designed with the enclosure, connector launches, and test points to preserve signal integrity.
Recomendado
Embedded Network Platform
BCM5389IFBG fits an embedded platform that needs multiple Gigabit Ethernet links without relying on an external multiport switch. Nine MACs allow the system to combine eight SGMII/SerDes ports with one GMII/RGMII/RvMII interface, supporting bridging or management functions described by the Broadcom architecture. IEEE 802.3u, 802.3ab, and 802.3x support provides compatibility with Fast Ethernet, Gigabit Ethernet, and flow-control-equipped equipment. Firmware, initialization straps, clocks, and the power sequence must be validated independently of the hardware replacement decision.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para BCM5389IFBG — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | BCM5389KFBG |
|---|---|---|
| Package | 256-pin FBGA | 256-pin FBGA package family; complete ball map requires datasheet verification |
| Brand | Broadcom | Broadcom |
| Product Type | 8-port Gigabit Ethernet switch with integrated SerDes | 8-port SGMII Ethernet switch |
| Gigabit Ethernet Ports | 8 ports | 8 ports |
| Serial Interfaces | 8 SGMII/SerDes interfaces | SGMII Ethernet switch |
| Host Interface | 1 GMII/RGMII/RvMII interface | GMII, RGMII, and RvMII listed in verified comparison |
| Operating Supply Voltage | 1.2 V | 1.2 V |
| Mounting Type | SMD/SMT surface mount | SMD/SMT surface mount |
Diferenciadores clave
- Eight integrated SerDes interfaces reduce external switching-device count (frente a BCM5389KFBG)
- Compact high-density integration in a 256-pin FBGA (frente a BCM5389KFBG)
- Large switching resources for burst traffic (frente a BCM5389KFBG)
- Standards coverage for interoperable Ethernet equipment (frente a BCM5389KFBG)
Notas de diseño
Route all eight SGMII/SerDes interfaces as controlled-impedance differential pairs on a continuous reference plane. Keep connector and PHY launch geometry symmetric, minimize layer transitions and stubs, and avoid splitting the plane beneath a differential pair. The supplied excerpts identify eight SerDes interfaces but do not specify the target impedance or insertion-loss budget, so derive those values from the complete Broadcom datasheet and the selected PHY or transceiver.
The 256-pin FBGA requires a deliberate escape-routing strategy. Account for ball pitch, available via rules, layer transitions, and the location of power and ground balls before committing to stack-up. Maintain short ground-return paths and place bulk and high-frequency decoupling near the device supply balls. The verified sources do not provide ball maps or recommended land patterns, so use the official package drawing rather than a generic BGA footprint.
Budget the 1.2 V rail for switching and SerDes operation using the worst-case current from the full manufacturer datasheet; the supplied excerpts do not provide current consumption. Separate the 1.2 V source from noisy digital activity where the power architecture permits, and verify startup sequencing with every external PHY, clock source, and transceiver. Because no internal power-tree details are available in the verified excerpts, do not infer acceptable rail ramp rates.
Do not treat a shared family name or published function summary as proof that BCM5389KFBG is a drop-in replacement. The supplied comparison confirms the eight-port SGMII function, 1.2 V supply, and SMD mounting, but it omits the full 256-ball assignments. Before substitution, compare SerDes and clock pins, power and ground balls, configuration straps, reset behavior, exposed thermal requirements, package dimensions, and qualification records.
Información de cumplimiento
The verified excerpts identify IEEE 802.3u, IEEE 802.3ab, and IEEE 802.3x compliance and describe the part as moisture sensitive, but they do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Those values require confirmation from the manufacturer product page or current declarations.
