BCM54285C1KFBG

The BCM54285C1KFBG is Broadcom’s single-port Gigabit Ethernet PHY. It provides the physical layer to connect a MAC (host processor) to a 10/100/1000 Mbps Ethernet link. Key features typically include auto-negotiation and speed/duplex selection, full/half duplex operation, and auto MDI/MDI‑X crossover, plus a standard MDIO/MDC management interface for register access and configuration. It supports 10/100/1000BASE-T operation and often includes energy-efficient Ethernet (EEE) features. The C1KFBG suffix denotes a specific RoHS-compliant packaging variant (package type and temp range). Common applications are embedded systems, network interface cards, and switches that require a Gigabit PHY. For exact electrical specs, pinout, and interface options (e.g., MAC interface variants), consult the BCM54285 datasheet and product brief.

Direct non-Broadcom equivalents do not exist. The closest matches are other Broadcom devices in the BCM54285 family (same package/pinout and similar 1G PHY/switch functionality). For a formal cross-reference, consult Broadcom’s cross-reference matrix or contact Broadcom support; otherwise, substituting with third-party parts will likely involve pinout/feature differences.

Here are the typical features of Broadcom BCM54285C1KFBG:
- 1-port Gigabit Ethernet controller (10/100/1000BASE-T)
- PCI Express host interface
- Integrated MAC/PHY with auto-negotiation (MDI/MDI-X)
- IEEE 802.3az Energy Efficient Ethernet (EEE)
- Jumbo frames support (up to ~9 KB)
- Hardware offloads: IPv4/IPv6 checksum, TCP/UDP checksum, TCP segmentation (LSO)
- Hardware VLAN support: 802.1Q tagging/stripping
- Wake-on-LAN and PCIe power management
- MSI/MSI-X interrupt support
- MDIO interface for PHY management
- Broad driver support (Windows/Linux and embedded OS)

- Pin count: 28 pins (28‑pin package, e.g., QFN)
- Function: Single‑port Gigabit Ethernet PHY (10/100/1000BASE‑T) providing the physical layer and MAC interface (GMII/RGMII) to the MAC for an Ethernet RJ‑45 connection.

- Manufacturer: Broadcom Inc.
- What kind of company: A multinational semiconductor company that designs and supplies a broad range of semiconductor products and related infrastructure software for networking, data centers, broadband, wireless, and storage.

BCM54285C1KFBG is a Broadcom Gigabit Ethernet PHY (10/100/1000BASE-T) that provides the physical layer for devices with an external MAC. Common application areas include:
- Motherboards, SBCs, and NICs requiring GbE
- Network switches, external PHY modules, and network appliances
- Routers, gateways, firewalls, and VPN devices
- NAS and small/medium servers
- IP cameras, video encoders, and surveillance systems
- Industrial automation and rugged Ethernet devices
- Consumer electronics with wired Ethernet ports
- Telecommunication edge devices

BCM54285C1KFBG comes in a 64-pin LQFP (lead-free, RoHS-compliant) package.