The capabilities of the BCM89890 have been validated in real-world demonstrations, proving its readiness for production vehicles.
With the emergence of autonomous driving capabilities, vehicles now process petabytes of environmental data. High-resolution 4K camera systems, LiDAR, and 4D radar arrays must stream massive amounts of raw, uncompressed data to central compute blocks instantaneously. Standard enterprise networking components cannot withstand the intense heat, extreme vibrations, and intense electromagnetic interference (EMI) found inside a vehicle.
High-bandwidth links for 4K cameras, Lidar, and 4D Radar.
This guide provides an overview of the BCM89890's features, functionality, and usage. bcm89890
The is a high-performance multigigabit Automotive Ethernet PHY (Physical Layer) transceiver. It is recognized as the industry's first device fully compliant with the IEEE 802.3ch standard , enabling data rates of 2.5 Gbps, 5 Gbps, and 10 Gbps over a single pair of shielded twisted-pair (STP) cables. Key Specifications & Features
Fully compliant with AEC-Q100 requirements, ensuring reliability in harsh automotive environments.
: Tools like the Inno-Maker Automotive Ethernet Converter allow for point-to-point conversion between 10GBASE-T1 and standard RJ45 Ethernet for laboratory debugging. The capabilities of the BCM89890 have been validated
The versatility of the BCM89890 makes it a key enabling technology across multiple high-bandwidth, safety-critical, and convenience-oriented automotive domains.
Broadcom has integrated hardware security features (MACsec support) into this line, which is becoming increasingly important as cars become connected devices vulnerable to hacking. From a design perspective, it integrates the termination resistors, reducing the Bill of Materials (BOM) count for engineers designing the PCBs.
, supporting multi-gigabit speeds over a single shielded twisted-pair (STP) cable. Key Technical Specifications Multi-Gigabit Support : Delivers flexible data rates of 2.5G, 5G, and 10G Enhanced Security : Features integrated 802.1AE MACsec with 128/256-bit AES encryption to protect in-vehicle data. Interfaces : Supports high-speed XFI and PCIe interfaces for seamless connection to host SoCs or switches. Time Sensitivity : Includes PHY timestamping for IEEE 1588 / 802.1AS , making it suitable for synchronized automotive networks. Automotive Grade AEC-Q100 qualified It is reliable
Unlike traditional Ethernet, 100BASE-T1 does require isolation magnetics in the same way. However, the BCM89890 still requires a Common Mode Choke (CMC) on the MDI (Media Dependent Interface) lines to suppress EMI. Broadcom’s reference designs typically specify a specific CMC part number from TDK or Murata.
For any OEM or Tier-1 supplier building a zonal architecture that requires robust 1Gbps connectivity without breaking the bank on 10G hardware, the BCM89890 is a top-tier choice. It is reliable, secure, and built to survive the harsh reality under the hood.