TI 100BASE-T1 Ethernet PHY
Texas Instruments (TI) introduced a new automotive Ethernet physical layer (PHY) transceiver that cuts the external component count and board space in half and reportedly consumes as little as half the power of competitive solutions. The DP83TC811S-Q1's support for serial gigabit media independent interface (SGMII), small packaging, and integrated diagnostic features enables designers to bring greater intelligence via Ethernet connectivity to space-constrained automotive body electronics, infotainment and cluster, and advanced driver assistance system (ADAS) applications.
As the first 100BASE-T1 device to support SGMII, the DP83TC811S-Q1 Ethernet PHY improves design flexibility by enabling connections to multiple switches and interfaces. The DP83TC811S-Q1 supports the full range of media independent interfaces (MII), which enables designers to implement Ethernet connectivity with various media access controllers (MACs) and 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 an ESD monitor.
Key features and benefits of the DP83TC811S-Q1 Ethernet PHY include
Smaller solution size and lower weight: In addition to requiring fewer external components, the DP83TC811S-Q1 comes in a 6-mm-by-6-mm wettable flank package, which can reduce solution size by 50%.
Low power consumption: Developed using one of TI's low-power process technologies, the DP83TC811S-Q1's lower power minimizes thermal dissipation and enables components to be placed closer together.
Robust and intelligent design: The integrated diagnostic toolkit features cable diagnostics, temperature and voltage sensors, and an ESD monitor, enabling engineers to create designs that can withstand ESD and voltage events. The diagnostic features enable designers to continually monitor the integrity of the Ethernet link.
Simpler layout, flexible design, and high performance: SGMII uses only four pins instead of the 12 required for reduced gigabit media independent interface (RGMII), reducing board size and number of traces for a simplified design layout. Additionally, the integration of a physical medium dependent (PMD) filter, MII series terminators, PMD termination, and power-supply filtering components reduce the need for external discrete circuitry, leaving more board space for designers to add features. The DP83TC811S-Q1 has a latency as low as 140 ns, allowing latency-critical systems like automotive ADAS to respond and communicate more quickly.
Designers can evaluate the device and its SGMII support with the DP83TC811SEVM evaluation module. Designers who need only RGMII can use the DP83TC811EVM evaluation module. Both are available through the TI store and authorized distributors. Engineers can also jump-start their system design with the Automotive Stand-Alone Gateway Reference Design and the Cost-Effective In-Vehicle Infotainment System Reference Design.