Bcm89890 [top] Jun 2026

While the BCM89890 is a 100Mbps device, it is often deployed in mixed-speed networks. Many next-generation designs pair it with a 1000BASE-T1 (1 Gbps) PHY for backbone links while keeping the BCM89890 for leaf nodes (door handles, window lifters, seat controllers). This provides a graceful upgrade path: the central switch can support both speeds, and the BCM89890 remains viable for low-bandwidth, cost-sensitive endpoints well into the 2030s.

Optimized for high-speed PCIe and XFI interfaces to connect seamlessly with switch ICs or host System-on-Chips (SoCs).

Furthermore, the BCM89890 is specifically qualified for and meets stringent EMI/RFI emission standards, making it suitable for everything from engine control units to infotainment systems.

Transmitting high-resolution data from LIDAR, 4D Radar, and 4K camera systems requires the multigigabit bandwidth that the BCM89890 provides. bcm89890

with 128/256-bit AES encryption to secure data moving between Electronic Control Units (ECUs). Interfaces:

Utilizes high-speed XFI and PCIe interfaces for seamless connection to host SoCs (System on Chips) or automotive switches. Key Applications in Modern Vehicles

long, supporting up to four in-line connectors, which is a standard requirement for large vehicle platforms. While the BCM89890 is a 100Mbps device, it

| Feature | BCM89890 | Standard 100BASE-TX | NXP TJA1100 | | :--- | :--- | :--- | :--- | | | 1 | 2 | 1 | | Connector Type | Standard automotive header (H-MTD, MATEnet) | RJ45 (unsuitable for automotive) | Standard automotive | | EMI Performance | Excellent (33 MHz bandwidth) | Poor (125 MHz bandwidth) | Excellent | | Wake-up Support | Yes (digital wake-up) | No | Yes | | Cable Diagnostics | Advanced TDR | Basic | Basic | | Ecosystem | Broadcom switch integration | General purpose | NXP processor integration |

Driving ultra-high-resolution 4K displays and complex rear-seat entertainment systems.

: Compatible with SFP+ and RJ45 modules through media converters. Optimized for high-speed PCIe and XFI interfaces to

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Broadcom BCM89890 is a multigigabit automotive Ethernet Physical Layer (PHY) transceiver specifically designed for high-bandwidth, secure in-vehicle networking. It was notable for being the industry's first PHY to comply with the IEEE 802.3ch standard for automotive multigigabit Ethernet. Key Technical Specifications

With vehicles increasingly connected via telematics, cars are vulnerable to external cyber threats. The BCM89890 features built-in IEEE 802.1AE MACsec hardware acceleration. By handling 128/256-bit AES encryption directly at the line-rate on the PHY chip, it prevents: Man-in-the-middle attacks Packet sniffing and data breaches Malicious payload injections