The BCM89890 is a PHY (Physical Layer) device that provides the physical interface for Ethernet connectivity. Its primary functions include:
: Incorporates Clause 45 (CL45) MDIO register protocol, ensuring proper system-level management and diagnostics across shared management buses. 🔒 Security and Time-Sensitive Networking (TSN)
with 128/256-bit AES encryption to secure data moving between Electronic Control Units (ECUs). Interfaces:
The BCM89890 is designed for low power consumption, critical for electric vehicles (EVs) looking to maximize range. It features various low-power modes to operate efficiently during both high-speed data processing and idle times. 4. Advanced Interfaces (XFI and PCIe)
With cyber threats looming large, security is paramount. The BCM89890 integrates IEEE 802.1AE MACsec with 128/256-bit AES encryption. This hardware-level encryption ensures secure, authenticated communication between sensors and domain controllers, protecting against data tampering or interception. 3. Low-Power Consumption and Efficient Design bcm89890
By utilizing a single pair of shielded twisted-pair (STP) cables to deliver 10Gbps, the
The BCM89890 operates at the Physical Layer (Layer 1) of the OSI model, translating digital data from the network controller into electrical signals transmitted across the physical cabling. Specification Details Fully compliant with IEEE 802.3ch (2.5G/5G/10GBASE-T1) Supported Data Rates 2.5 Gbps, 5 Gbps, and 10 Gbps (Multi-rate negotiation) Physical Medium Single Shielded Twisted-Pair (STP) copper cable Hardware Security IEEE 802.1AE MACsec (128/256-bit AES link-layer encryption) Host Interfaces
: Features integrated 802.1AE MACsec with 128/256-bit AES encryption to secure vehicle data communication against tampering or eavesdropping [5.6, 5.16].
The BCM89890 employs robust echo cancellation and crosstalk mitigation. It can tolerate significant channel impairments, including impedance mismatches and connector reflections, making it ideal for noisy automotive environments (e.g., near high-current motor drives or infotainment displays). The BCM89890 is a PHY (Physical Layer) device
Improved handling in Ethernet host connections. VN5000 Ethernet Interface Family Manual - Vector
Diagnostics over IP (DoIP) requires a physical connection via the OBD-II port. The BCM89890 is often placed on the diagnostic gateway, allowing a dealer scan tool to connect to the vehicle’s entire Ethernet network without needing legacy CAN bridges.
Autonomous driving functions and coordinated control systems require extremely precise timing. To support this, the BCM89890 integrates a (gPTP) protocols. This feature, combined with a fast link-up time , makes the device perfectly suited for time-sensitive applications where low and deterministic latency is a must.
The device provides full-duplex 1 Gbps data transfer over a single balanced twisted-pair cable. It supports cable lengths up to 15 meters (typically for in-vehicle networks) and meets the stringent EMC requirements of the automotive environment. Interfaces: The BCM89890 is designed for low power
, meeting stringent automotive requirements for electromagnetic compatibility (EMC) and extreme temperature operation. Primary Applications The chip is a critical component for Software-Defined Vehicles (SDVs) , where high-speed backbone communication is essential for: Autonomous Driving (ADAS):
Whether you are designing a new ADAS sensor cluster, a domain controller, or a telematics gateway, the BCM89890 stands as a proven, reliable, and future-ready choice. Its ecosystem support, broad availability, and integration with Broadcom’s switching silicon make it a staple component in virtually every modern luxury and electric vehicle on the road today.
In the rapidly evolving landscape of automotive connectivity and industrial IoT, the demand for high-bandwidth, low-latency data transmission is insatiable. The by Broadcom stands out as a premier solution in this space, addressing the critical need for single-pair Ethernet in next-generation vehicles.
BCM89890B1BFBG, BCM89890A1BFBG (different temperature ranges and package options). Always consult the latest Broadcom datasheet and application note 100BASE-T1-AN for reference schematics.
Standard consumer-grade Ethernet chips fail under the extreme conditions of a vehicle powertrain. The BCM89890 is hardened to thrive under extreme physical stress. Rigorous Standards Compliance