BCM5387KFBG - 8-Port 5GbE SGMII Switch | Broadcom
料号： BCM5387KFBG ✓ 量产中BCM5387KFBG 概述
An Ethernet switch controller is an integrated circuit that coordinates traffic between multiple physical network ports. It belongs to the hierarchy of Ethernet interface integrated circuits, network interface controllers, interface semiconductors, and broader communication semiconductors. In this product, an integrated SerDes provides the physical-layer signaling path, SGMII supplies a serial Gigabit Ethernet interface, and SPI provides a host-processor control connection.
The principal verified feature set includes eight switch ports, 5GbE-class operation, integrated SerDes, SGMII support, and SPI control. These features make the BCM5387KFBG relevant to compact network appliances, access equipment, industrial Ethernet systems, and other designs requiring multiple high-speed Ethernet ports. Its 256-BGA package supports dense PCB layouts, but it also requires careful escape-routing, power-plane design, and thermal analysis because of its fine ball-grid-array construction.
The integrated SerDes architecture reduces the need for separate PHY-related circuitry when the host system uses compatible SGMII links. SGMII carries Ethernet data and control information over a high-speed parallel or serial interface intended for communication between Ethernet switching or PHY subsystems and a host processor. Exact lane rates, SerDes signaling levels, supported copper media, and internal switching architecture were not exposed in the supplied verified results and must be confirmed in the manufacturer datasheet before design release.
Typical implementation targets include eight-port Ethernet switches, industrial network gateways, endpoint controllers, and communication equipment that uses SGMII-connected SerDes links. The SPI interface can support register configuration, initialization, and runtime control from an embedded controller. Actual protocol timing, register access behavior, clock requirements, and software model should be validated against Broadcom's complete technical documentation rather than inferred from distributor summaries.
A critical design consideration is the 256-BGA footprint. Signal escape routing, via-in-pad use, multilayer construction, power-plane continuity, and exposed thermal strategies can materially affect manufacturability. The supplied sources do not provide detailed pin assignments, ball maps, recommended capacitors, or thermal resistance, so these values remain unavailable and should be obtained from the authoritative Broadcom documentation before schematic capture.
This page consolidates verified distributor availability, the published 12.6817 US-dollar starting price as of 2026-10-29, package identification, interface descriptions, and a rigorous drop-in-replacement assessment. It also separates documented facts from missing engineering data, helping procurement and engineering teams avoid assuming unverified pin compatibility or unconfirmed electrical performance.
直接替换替代料： BCM5387KFBG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料BCM5387KFBG 最大额定值与电气特性
| Product Type | 8-port Ethernet switch controller |
| Port Count | 8 ports |
| Ethernet Performance Class | 5GbE |
| SerDes | Integrated SerDes |
| Host Interface | SPI |
| Switch Interface | SGMII |
| Package Type | 256-BGA |
| Package Dimensions | 17 mm x 17 mm |
| Ball Count | 256 balls |
| 安装类型 | Surface mount |
BCM5387KFBG 17 mm x 17 mm 引脚配置指南
BCM5387KFBG（17 mm x 17 mm 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： BCM5387KFBG.
请参阅 数据手册 以查看完整引脚配置。
典型应用
BCM5387KFBG 适用于 6 应用s: Eight-Port Industrial Ethernet Gateway, Network Access Equipment, Communication Appliance with SGMII PHYs, Managed Ethernet Endpoint Controller, High-Density Network Interface Backplane, Ethernet Test and Measurement Platform.
Eight-Port Industrial Ethernet Gateway
The BCM5387KFBG fits an eight-port gateway when the equipment uses SGMII links from compatible external PHYs and requires centralized switching under host control. Its eight-port count and integrated SerDes provide a clear architectural match for dense industrial Ethernet equipment, while SPI allows an embedded controller to configure registers and supervise the switch. The 256-BGA footprint supports compact routing but demands multilayer escape routing, continuous power planes, and careful BGA assembly controls. Before release, engineers must verify the unsupported-from-source details: operating temperature, port media capabilities, core and I/O supplies, SerDes lane rates, clock requirements, reset behavior, and initialization firmware.
推荐
Network Access Equipment
BCM5387KFBG is suitable for network access equipment requiring eight switched Ethernet ports and a processor-facing control path. SGMII provides the documented interface between the switching subsystem and compatible PHY or host circuitry, while SPI supplies a compact mechanism for configuration and status access. This arrangement can reduce board area compared with distributing switching across several smaller controllers, provided the host processor can support the required initialization sequence and register profile. The verified source set does not state switching fabric throughput, latency, VLAN support, spanning-tree behavior, or queueing, so those capabilities must be checked in the complete Broadcom documentation before architecture approval.
推荐
Communication Appliance with SGMII PHYs
The BCM5387KFBG fits a communication appliance where eight external network paths are implemented with SGMII-compatible PHYs. The switch controller's integrated SerDes reduces interface complexity when the physical-layer devices are designed for serial Gigabit Ethernet connectivity, and the SPI interface can connect directly to a host processor or embedded controller. This makes the part relevant to gateways and edge equipment requiring multiple Ethernet services without several unrelated interface blocks. Designers should confirm whether each port supports the required media, speed, cable reach, and auto-negotiation behavior. They should also budget board area for a 256-BGA layout and validate signal-integrity, power-integrity, and thermal solutions against the authoritative datasheet.
推荐
Managed Ethernet Endpoint Controller
BCM5387KFBG can serve as the central eight-port switching element in a managed endpoint when an embedded host initializes and controls it over SPI. This arrangement suits equipment that needs multiple Ethernet links while sharing firmware, status reporting, and board-level management functions. The controller's documented 5GbE designation and integrated SerDes make it particularly relevant to designs using compatible high-speed serial Ethernet links. It is not a universal plug-in replacement for conventional PHYs because the external PHY, isolation, connector, and magnetics architecture must be matched. Confirm switch features, port restrictions, reference clock, firmware requirements, and reset timing before freezing the schematic. Use the official ball map to route power, grounds, SerDes, SPI, clock, and management signals.
推荐
High-Density Network Interface Backplane
The eight-port BCM5387KFBG can support high-density network interface backplanes in which compatible SerDes links connect the switching device to PHYs or other communication subsystems. Its 256-BGA package is appropriate for compact multilayer PCBs where fine-pitch routing and high pin density are required. The key benefit is consolidation of eight switch ports into one controlled IC rather than duplicating interface subsystems, but the benefit depends on accurate lane routing, controlled-reference clocking, clean power delivery, and compatible host software. The supplied evidence does not identify differential impedance targets, SerDes reach, synchronization features, or signal conditioning requirements. Obtain those values from Broadcom and validate the complete channel before production release.
推荐
Ethernet Test and Measurement Platform
BCM5387KFBG can be incorporated into test and measurement equipment that needs a repeatable eight-port Ethernet switching subsystem controlled by an embedded test controller. SGMII connectivity enables the design to use compatible PHY or SerDes test fixtures, while SPI provides a straightforward control path for initialization, loopback-related configuration, and status monitoring. Because the verified material does not expose the switch's loopback, forwarding, diagnostic, or synchronization features, engineers should not infer those functions from the distributor description alone. The 256-BGA package also requires a stable reference clock, low-noise supply distribution, and careful BGA inspection. Confirm all test-mode behavior and timing margins in the manufacturer documentation and validate the assembled channel with representative traffic.
推荐
推荐产品汇总
工程参考数据： BCM5387KFBG ——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 |
|---|---|
| Port Count | 8 ports |
| Ethernet Performance Class | 5GbE |
| SerDes | Integrated SerDes |
| Switch Interface | SGMII |
| Host Control Interface | SPI |
| Package | 256-BGA (17 mm x 17 mm) |
| Brand | Broadcom |
| Verified Starting Price | 12.6817 USD as of 2026-10-29 |
| Surface-Mount Package | Yes |
| Ball Count | 256 balls |
关键差异点
- Eight integrated network ports in one controller （对比 A discrete multi-PHY design using multiple LAN8720A-CP devices)
- Integrated SerDes with SGMII connectivity （对比 A conventional coprocessor-centered Ethernet interface arrangement)
- Processor control through SPI （对比 A parallel-register network controller arrangement)
设计说明
Treat the BCM5387KFBG as a demanding 256-BGA layout rather than a conventional fine-pitch perimeter device. Use the official ball map to classify every position as power, ground, signal, reserved, or no-connect. Plan multilayer escape routing and via-in-pad requirements against the manufacturer's assembly recommendations. Because the verified data does not state pad-stack geometry, solder-mask rules, or via dimensions, do not derive those values from generic BGA practice; obtain them from the authoritative package drawing.
Reserve power-plane and decoupling resources for the switch controller's core and I/O supplies, but use the manufacturer datasheet to determine the actual voltage values, tolerance, sequencing, and startup limits. Place required high-frequency bypass capacitors directly at the relevant supply and ground balls, following the reference layout. The verified records do not provide current consumption, ripple limits, or startup timing, so an estimated power budget must not be treated as a release value.
Develop the SerDes and SGMII channels with controlled impedance, continuous return paths, and the exact topology shown in the Broadcom reference design. Confirm lane rates, differential impedance, insertion-loss limits, connector or PHY reach, and reference-clock requirements before selecting PCB stack-up. Because those parameters are absent from the supplied source snippets, use controlled-impedance calculations and channel simulations based on validated datasheet targets rather than generic Ethernet assumptions.
Do not treat a similarly featured Ethernet controller as a drop-in replacement merely because it has eight ports. A safe replacement requires an identical 256-BGA ball pattern, compatible power and ground assignments, equivalent SerDes and SGMII behavior, compatible SPI register access, matching clock and reset requirements, and a workable software initialization sequence. The supplied cross-reference search did not identify a verified drop-in candidate, so any substitution requires manufacturer confirmation or a formal redesign.
合规信息
The supplied verified web results identify the manufacturer, interface architecture, package, availability, and one distributor price but do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations.
