BCM5482A1KFB Dual-Port Gigabit Ethernet PHY | Broadcom
料号： BCM5482A1KFB ✓ 量产中BCM5482A1KFB 概述
An Ethernet PHY converts between a digital MAC-side interface and analog copper-cable signaling. The BCM5482A1KFB integrates two physical-layer channels, allowing one component to serve two Ethernet ports while reducing board area in IP phones, access equipment, industrial controllers, and other multiport systems. Its dual-port architecture can reduce the number of discrete PHY packages required on a board.
The BCM5482A1KFB supports 10, 100, and 1000 Mb/s rates and is compatible with IEEE devices operating in half-duplex and full-duplex configurations. This broad rate support lets a product design accommodate legacy 10BASE-T and 100BASE-TX links while retaining Gigabit Ethernet capability. The integrated SerDes also connects the PHY channels to digital network processors or switching silicon.
Clock timing can be adjusted to compensate for board-trace delays required by the RGMII specification. This feature is particularly useful when the PHY and MAC are separated by a routed interface or when propagation delay through a multilayer board would otherwise affect timing margins. The adjustment capability supports more practical placement of high-speed digital circuitry on space-constrained boards.
Low-power operation is a central design benefit for dual-port PHYs because each active channel continuously performs line coding, signal conditioning, and cable diagnostics. The device is suited to IP phone uplinks, industrial networking equipment, customer-premises equipment, and embedded dual-Ethernet systems where package size, port density, and interface timing are important design constraints.
For implementation, follow the Broadcom BCM5482 documentation for power sequencing, magnetic-component selection, termination, clock configuration, and the exact pin assignments. Preserve the recommended high-speed layout practices around the RGMII interface and place input, output, and decoupling connections according to the reference design to avoid signal-integrity degradation.
This page combines the device’s dual-port Gigabit Ethernet capabilities with practical selection guidance, verified source links, interface considerations, and design guidance. It is designed to help engineers identify the correct operating conditions and board-level integration requirements before committing a BCM5482A1KFB-based Ethernet interface to production.
直接替换替代料： BCM5482A1KFB ——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BCM5482A1KFB 最大额定值与电气特性
| Product Type | Dual-port 10/100/1000BASE-T Ethernet PHY transceiver with SerDes |
| Number of Ports | 2 ports |
| Supported Data Rates | 10 Mb/s, 100 Mb/s, and 1000 Mb/s |
| Duplex Operation | Half-duplex and full-duplex |
| Digital Interface | RGMII |
| Clock Timing Adjustment | Adjustable to compensate for RGMII board-trace delays |
| Cable Standard | 10/100/1000BASE-T |
| IEEE Compatibility | IEEE 802.3, IEEE 802.3u, and IEEE 802.3ab |
| Package Type | 121-pin plastic ball grid array |
| 安装类型 | Surface mount |
| Power Architecture | Low-power dual-port integration |
| SerDes Integration | Integrated SerDes |
BCM5482A1KFB 121-pin plastic ball grid array 引脚配置指南
BCM5482A1KFB（121-pin plastic ball grid array 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： BCM5482A1KFB.
请参阅 数据手册 以查看完整引脚配置。
典型应用
BCM5482A1KFB 适用于 6 应用s: IP Phone Uplink, Industrial Ethernet Gateway, Access Equipment Uplink, Network Interface Controller, Embedded Dual-Ethernet Controller, Ethernet Test and Measurement.
IP Phone Uplink
The BCM5482A1KFB fits an IP phone that needs two copper-network connections while keeping the PCB compact. One channel can serve a primary network uplink while the second supports a secondary connection, pass-through, or equipment-specific Ethernet function. The device’s dual 10/100/1000BASE-T capability accommodates 10, 100, and 1000 Mb/s network links, while integrated SerDes reduces the number of external interface components. Its RGMII clock adjustment also helps address PCB routing delay between the PHY and host controller.
推荐
Industrial Ethernet Gateway
The BCM5482A1KFB is suitable for an industrial gateway that bridges local equipment to a copper Ethernet backbone. Two integrated PHY channels provide a compact implementation for separate network segments without requiring two large multi-pin packages. Support for 10, 100, and 1000 Mb/s links allows the same design to connect both legacy and Gigabit infrastructure. Low-power dual-port integration is valuable when the gateway has a constrained thermal envelope or limited board area.
推荐
Access Equipment Uplink
Access terminals, customer-premises equipment, and compact network appliances can use the BCM5482A1KFB when two Ethernet ports are required near the edge of the network. Its half-duplex and full-duplex operation across 10, 100, and 1000 Mb/s provides compatibility with a broad range of endpoint speeds. The 121-pin PBGA arrangement supports high interconnect density, while integrated SerDes and adjustable RGMII timing help engineers develop a repeatable host-interface layout.
推荐
Network Interface Controller
The BCM5482A1KFB can provide the copper-facing side of a network interface controller or switching subsystem. Its SerDes connection supports a digital host architecture, while the adjustable RGMII clock permits compensation for board propagation delay. The device is appropriate where a system must offer both 100BASE-TX and 1000BASE-T connectivity over compact PCB space. Designers should implement the Broadcom timing and reference-layout guidance to preserve signal integrity at the host interface.
推荐
Embedded Dual-Ethernet Controller
An embedded controller requiring two wired-network channels can use the BCM5482A1KFB to reduce PHY component count and routing congestion. The package supports 10BASE-T, 100BASE-TX, and 1000BASE-T links, enabling equipment to operate alongside both legacy and high-speed infrastructure. Its integrated dual-port architecture is useful in control cabinets and compact automation equipment, where surface-mount area is limited and predictable thermal behavior is important.
推荐
Ethernet Test and Measurement
The BCM5482A1KFB can form the network-facing section of portable test equipment or communication analyzers that need two copper ports. Supporting 10, 100, and 1000 Mb/s makes it possible to connect the instrument to a broad range of network equipment for configuration, loopback, and diagnostic workflows. The low-power dual-port integration helps conserve space and energy, while RGMII timing adjustment supports layouts where the PHY must be separated physically from the measurement controller.
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工程参考数据： BCM5482A1KFB ——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 |
|---|---|
| Package | 121-pin plastic ball grid array |
| Brand | Broadcom |
| Port Count | 2 ports |
| Supported Data Rates | 10 Mb/s, 100 Mb/s, and 1000 Mb/s |
| Duplex Modes | Half-duplex and full-duplex |
| Digital Interface | RGMII with adjustable clock timing |
| Integrated SerDes | Yes |
| Cable Compatibility | 10/100/1000BASE-T |
| IEEE Standards | IEEE 802.3, IEEE 802.3u, and IEEE 802.3ab |
| Power Characteristics | Low-power dual-port integration |
关键差异点
- Two copper Ethernet physical layers in one package （对比 Single-port Ethernet PHY)
- Broad copper-link rate support in each integrated channel （对比 100BASE-TX-only PHY)
- Adjustable RGMII timing （对比 PHY without RGMII delay adjustment)
设计说明
Route RGMII data and clock traces on a continuous ground plane with controlled impedance and matched lengths. Keep the clock away from switching power nodes and analog magnetics, and avoid vias or plane transitions on high-speed nets where possible. The BCM5482A1KFB supports adjustable clock timing for board-trace delay, but compensation should supplement—not replace—careful topology, return-path continuity, and signal-integrity verification.
Decouple each supply rail close to its package power balls using the capacitance and placement specified by Broadcom. Preserve the recommended power-up and power-down sequence, and account for inrush when both PHY channels are enabled. Estimate supply-headroom demand from the manufacturer’s worst-case operating current for the selected port rates, then verify regulator tolerance, startup behavior, and thermal rise across the complete enclosure.
Do not infer that any dual-port Gigabit Ethernet PHY is a drop-in replacement. A valid substitution must match the 121-pin package, ball assignment, power rails, RGMII timing, control interface, reset behavior, and management requirements. In particular, the related BCM5482A2KFB should not be selected as a drop-in part without a documented manufacturer or distributor cross-reference confirming those conditions.
Follow the Broadcom reference circuit for the line-side network interface, including the recommended isolation or magnetics arrangement, termination, and protective-network placement. Keep high-current Ethernet return currents controlled and provide the intended chassis or surge-current path to the network interface. Validate conducted and radiated emissions because PHY clocking, high-speed digital routing, and external magnetics can create coupling paths if their return-current paths are poorly controlled.
合规信息
The available manufacturer and distributor sources do not provide explicit compliance declarations for this ordering code. Confirm RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status with Broadcom before production release.
