BCM54140B0IFBG

BCM54140B0IFBG is Broadcom’s single-port Ethernet PHY (physical layer transceiver) used to connect a MAC to a 10/100/1000BASE-T network (RJ-45). It implements the IEEE 802.3 PHY functions, including auto-negotiation for speed/duplex, a standard management interface (MDIO), link status/LEDs, and typical low-power modes. The suffix B0 indicates the revision, and IFBG denotes packaging/ RoHS-compliant options. Typical applications include embedded Ethernet in SoCs, network interface cards, switches, and other network devices. For exact electrical specs (interfaces, voltage, timing, package details), refer to the BCM54140B0IFBG datasheet or product brief.

I don’t have the exact datasheet on hand, but BCM54140B0IFBG is a Broadcom 10/100/1000BASE-T Ethernet controller in a BGA package. Typical features include:
- MAC + PHY integrated for copper Ethernet
- Auto-Negotiation with 10/100/1000 Mbps support
- Full/half duplex operation with auto MDI/MDI-X
- IEEE 802.3az Energy Efficient Ethernet
- VLAN support (802.1Q) and offloads
- Jumbo frames and large RX/TX buffers
- Cable diagnostics and link/status reporting
- Wake-on-LAN and basic power-management features
- Packaging: BGA (B0IFBG variant) suitable for embedded/PC NIC use
For exact specifications, timing, interfaces, and any optional features, please refer to the official datasheet.

- Pin count: 48 pins (QFN-48 package, RoHS, revision B0).
- Function: Broadcom Gigabit Ethernet PHY (IEEE 802.3 10/100/1000BASE-T) transceiver, provides the physical layer interface between the MAC and the Ethernet cable (MAC interface typically via MII/GMII/RGMII).

- Manufacturer: Broadcom Inc. (Broadcom)
- What kind of company: A multinational semiconductor company that designs and sells a wide range of chips and related infrastructure software; it is typically fabless (outsources manufacturing).

BCM54140B0IFBG is Broadcom’s 10/100/1000BASE-T Ethernet PHY. Typical application areas include:
- Network interfaces in desktops, servers, and motherboard NICs
- Routers, switches, gateways, and other network appliances
- Embedded networking in consumer devices (set-top boxes, IP cameras, networked media players)
- Industrial and enterprise equipment requiring reliable Ethernet connectivity
- Reference designs and development boards for evaluating Ethernet PHY performance

FBGA (Fine-pitch Ball Grid Array) package.