MICROCHIP LAN8770M-I/PRA

The LAN8770 is a compact, cost-effective, single-port 100BASE-T1 Ethernet physical layer transceiver compliant with the IEEE 802.3bw-2015 specification. The device provides 100 Mbit/s transmit and receive capability over a single Unshielded Twisted Pair (UTP) cable, supporting cable lengths of up to at least 15m. The LAN8770 is available in a Grade 1 Automotive (-40°C to +125°C) temperature range and is optimized for AEC-Q100 automotive use cases such as Automated Driver-Assistance Systems (ADAS), infotainment, telematics, smart antennas, and in-vehicle backbones. The LAN8770 supports communication with an Ethernet MAC via standard MII/RMII/RGMII interfaces (RGMII LAN8770R only). An optional 125MHz or 50MHz reference clock output is provided for RGMII and RMII applications, respectively. Reverse MII mode (LAN8770M only) provides the ability to connect two PHYs back-to-back. An integrated SMI interface provides rapid register access and configuration. Microchip’s LAN8770 EtherGREEN™ energy efficient technology provides low-power 100BASE-T1 PHY operation along with an ultra low-power sleep mode with local wake-up support (partial networking), sleep request recognition, and various wake/enable signals for low power modes. FlexPWR variable I/O and core power supply voltages provide flexible design options and power saving opportunities. Advanced PHY diagnostics provide the user with troubleshooting capabilities such as cable defect detection of shorts or opens, a receiver Signal Quality Indicator (SQI), over-temperature, under-voltage protection, comprehensive status interrupt support, and various loopback and test modes.

• Single-chip Ethernet physical layer transceiver
• Compliant with IEEE 802.3bw-2015 (100BASE-T1)
• Supports MII/RMII/RGMII (RGMII LAN8770R only)
• OPEN Alliance TC10 support / wake-up support
• Ultra low power sleep
• FlexPWR technology power management
• Advanced Signal Quality Indicator (SQI)
• Over-temperature and under-voltage protection
• Comprehensive status interrupt support
• Extended cable reach
• Small footprint 32-pin VQFN (5×5 mm) and 36-pin VQFN (6×6 mm) with wettable flanks
• AEC-Q100 automotive product qualification
• Grade 1 Automotive temperature range (-40°C to +125°C)
• Microchip Functional Safety Ready
• 100Mbps over single balanced twisted pair cable
• Supports cable lengths up to at least 15m
• 3-level Pulse Amplitude Modulation (PAM-3) line coding
• Echo cancellation
• Jumbo frame support up to 16KB
• On-chip termination resistors for balanced UTP cable
• 125MHz reference clock output (LAN8770R only)
• 25MHz / 50MHz RMII clock mode
• Reverse MII mode for back-to-back connection of two PHYs (LAN8770M only)
• SMI interface for rapid register access
• Integrated transmission filtering
• MII/RMII/RGMII drive strength adjust
• 125MHz RGMII clock slew rate adjust
• Ultra low-power sleep mode (typical 12μA) with local wake-up support (OPEN Alliance TC10)
• Sleep request recognition
• IDLE detection on MDI
• WAKE_IN pulse detection wakeup
• INH output for enable/disable of ECU supply
• ENABLE dedicated PHY enable/disable input pin
• Pin reset (RESET_N)
• Power-On Reset (POR) with brownout protection
• Software reset

• Advanced Driver-Assistance Systems (ADAS)
• Infotainment
• Telematics & Smart Antennas
• In-Vehicle Backbone
• Gateways