Ethernet PHY Eases Compact Auto Designs

Texas Instruments introduces what it calls the industry's first 100-Mb/s single-pair Ethernet PHY with SGMII. The automotive Ethernet physical layer (PHY) transceiver cuts external-component counts and board space in half and consumes as little as half the power of existing solutions. The DP83TC811S-Q1's support for serial gigabit media independent interface (SGMII), small packaging and integrated diagnostic features promises to bring greater intelligence via Ethernet connectivity to space-constrained automotive body electronics, infotainment and cluster, and advanced driver assistance systems (ADAS) applications.


The device supports the full range of media independent interfaces, which enables designers to implement Ethernet connectivity with various media access controllers (MACs) and processors such as the company’s Jacinto automotive processors. To help the system monitor and detect cable breaks, temperature and voltage variations, and electrostatic discharge (ESD) events, the DP83TC811S-Q1 features a diagnostic toolkit, including a patent-pending ESD monitor.

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Designers can evaluate the device and its SGMII support with the DP83TC811SEVM evaluation module. Those who need only RGMII can use the DP83TC811EVM evaluation module. Both are available for $299. The DP83TC811S-Q1 is available in a 36-pin wettable flank very thin quad flat no-lead package (VQFNP), starting at $2.25 each/1,000. To get even deeper enlightenment, review the DP83TC811S-Q1 data sheet.

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