To appreciate the BCM89885, it is useful to compare it to its two main rivals.
The PHY supports "Standby" and "Sleep" states defined by the OPEN Alliance TC10 standard. This is vital for Electric Vehicles (EVs), where a parasitic draw of even 1mA can drain the 12V battery over a long parking period. The BCM89885 can listen for a "Wake-up Pattern" (Magic Packet) while consuming less than 20 microamps. bcm89885
The Broadcom is a specialized automotive Ethernet physical layer (PHY) transceiver designed to meet the high-bandwidth and low-latency demands of modern vehicles . As a member of the BCM8988x family , it enables 100/1000 Mbps data rates over a single unshielded twisted-pair (UTP) cable. Key Features and Specifications To appreciate the BCM89885, it is useful to
Electromagnetic Interference (EMI) and Electromagnetic Compatibility (EMC) are the enemies of automotive electronics. A car is a "noisy" environment; the electric motors, ignition systems, and radio transmitters create a soup of electromagnetic noise. Conversely, a car's electronic systems must not emit interference that disrupts radio reception or other critical systems. The BCM89885 can listen for a "Wake-up Pattern"
This data travels over Ethernet cables. However, the digital binary data processed by a car's microcontroller or processor cannot simply be pushed through a copper wire directly. It needs to be converted into a signal that can withstand the physical challenges of transmission—electromagnetic interference, signal attenuation, and noise. This is the job of the (Physical Layer) transceiver.