4/4 Transceiver Full MII, RMII 32-VQFN (5x5) ## Engineering Specification ## General Description The **LAN8770M-I/PRA** is a Microchip Technology single-port **100BASE-T1 Ethernet physical layer transceiver** designed for automotive, industrial, and embedded networking applications. It provides Ethernet communication over a single balanced twisted pair and is suitable for compact systems requiring reliable network connectivity, low-power operation, and standard MAC interface support. The device is commonly used in automotive electronic control units, infotainment systems, telematics modules, sensor nodes, industrial control systems, and embedded Ethernet hardware. ## Device Identification Manufacturer Part Number: **LAN8770M-I/PRA** Manufacturer: **Microchip Technology** Product Family: **LAN8770** Device Category: **Integrated Circuit** Device Type: **Ethernet PHY Transceiver** Ethernet Standard: **100BASE-T1** Interface Type: **MII and RMII** Mounting Type: **Surface Mount** Package Type: **VQFN** ## Functional Description The device functions as an Ethernet physical layer transceiver that connects a host controller or microcontroller MAC interface to a single-pair Ethernet physical medium. It handles the analog and digital PHY functions required for 100BASE-T1 communication, allowing embedded systems to transmit and receive Ethernet data over a single twisted pair cable. ## Network and Interface Description The **LAN8770M-I/PRA** supports 100 Mb/s single-pair Ethernet communication and provides MII and RMII host interface options. This allows integration with microcontrollers, processors, gateways, and network controllers that support standard Ethernet MAC interfaces. The device is intended for applications where compact Ethernet connectivity and reduced cabling complexity are required. ## Electrical Description The device is designed for low-voltage operation and supports multiple supply domains according to the manufacturer’s recommended operating conditions. Proper power sequencing, decoupling, reset handling, clocking, and reference layout should be implemented to maintain stable PHY operation and signal integrity. ## Package and Mechanical Description The component is supplied in a compact surface-mount **VQFN package**, suitable for dense printed circuit board assemblies. The package supports automated assembly and is appropriate for space-constrained automotive and industrial electronic designs. ## Control and Diagnostic Description The PHY supports management and configuration through standard control interfaces used in Ethernet designs. It provides status monitoring and configuration capability for link management, operating mode selection, and system-level diagnostics. These features allow the host controller to configure and monitor Ethernet link behavior during operation. ## Automotive and Industrial Suitability The **LAN8770M-I/PRA** is suitable for embedded systems requiring robust single-pair Ethernet communication. It is applicable to automotive networking, telematics, infotainment, advanced driver assistance systems, industrial Ethernet nodes, building automation, control modules, and other connected embedded platforms. ## Mounting and Assembly Description The component is intended for surface-mount PCB assembly using standard reflow soldering processes. PCB layout should follow Microchip’s hardware design guidance, including proper power supply decoupling, controlled impedance routing, short signal paths, grounding, and separation of sensitive analog and digital sections where applicable. ## Design Considerations The design should account for Ethernet signal integrity, single-pair cable interface requirements, common-mode noise control, EMC performance, supply filtering, oscillator or clock source requirements, reset timing, thermal performance, and package solderability. The device should not be operated beyond the manufacturer’s specified electrical, thermal, or mechanical limits. ## Application Suitability The device is suitable for automotive Ethernet nodes, electronic control units, telematics modules, infotainment systems, sensor interfaces, industrial controllers, embedded gateways, connected equipment, and compact network-enabled hardware requiring 100BASE-T1 Ethernet PHY functionality. ## Hashtags #commonpartslibrary #integratedcircuit #ethernetphy #microchip #microchiptechnology #lan8770 #lan8770mipra #singlepairethernet #100baset1 #automotiveethernet #ethernettransceiver #phytransceiver #embeddednetworking #mii #rmii #vqfnpackage #smdcomponent #surfacemount #automotiveelectronics #industrialethernet #telematics #infotainment #embeddedhardware #pcbdesign #hardwaredesign #electronicscomponents #electronicparts #componentlibrary #engineeringparts #electronicsengineering

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support LAN8720A-CP-TR-ABC is a low-power, single-port 10BASE-T/100BASE-TX Ethernet Physical Layer (PHY) transceiver from Microchip Technology. It is designed to connect a microcontroller, processor, or Ethernet MAC to a standard Ethernet network through an RMII (Reduced Media Independent Interface). The device is widely used in embedded networking applications such as industrial controllers, IoT gateways, IP cameras, networked printers, routers, and ESP32-based Ethernet designs. Key Features Single-chip 10/100 Mbps Ethernet PHY Supports both 10BASE-T and 100BASE-TX Ethernet operation. RMII Interface Reduced pin-count interface for easy connection to Ethernet MACs and microcontrollers. IEEE 802.3 / 802.3u Compliant Fully compliant with Fast Ethernet standards. HP Auto-MDIX Support Automatically detects and configures straight-through or crossover Ethernet cables. Auto-Negotiation Automatically selects the best available speed and duplex mode. Flexible I/O Voltage Supports LVCMOS I/O voltages from 1.6 V to 3.6 V, simplifying interfacing with different processors. Integrated 1.2 V Regulator Allows operation from a single 3.3 V supply, reducing external components. Low-Power Architecture Features multiple power-saving modes through Microchip's flexPWR® technology. Built-in Diagnostics and Reliability Features Loopback modes, automatic polarity correction, link-status monitoring, and wake-up detection. Compact Package Available in a 24-pin SQFN/QFN (4 mm × 4 mm) package for space-constrained designs #CommonPartsLibrary #IntegratedCircuit

Ethernet ICs W55RP20 microcontroller, Dual ARM Cortex-M0+ a. 133MHz, 2MByte Flash memory on-chip, 264kB on-chip SRAM in six independent banks, DMA controller W55RP20 is a highly integrated System-in-Package (SiP) from WIZnet that combines the popular RP2040 dual-core microcontroller with a W5500 hardware TCP/IP Ethernet controller. Designed for IoT, industrial automation, and embedded networking applications, the W55RP20 delivers reliable Ethernet connectivity, low power consumption, and high-performance processing in a compact package. It simplifies Ethernet-enabled designs by integrating the MCU, network stack, flash memory, and Ethernet functionality into a single device. Key Features Dual-core ARM Cortex-M0+ processor running up to 133 MHz Integrated hardwired TCP/IP stack for reliable Ethernet communication 2 MB on-chip Flash memory 264 KB SRAM in six independent memory banks Built-in 10BASE-T / 100BASE-TX Ethernet MAC and PHY Supports TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE protocols 23 GPIO pins, including 4 analog-capable inputs 2× UART, 2× SPI, and 2× I²C interfaces 16 PWM channels and 8 Programmable I/O (PIO) state machines USB 1.1 Host/Device controller with integrated PHY 12-channel DMA controller for efficient data transfer Operating voltage range of 1.8 V to 3.3 V Industrial temperature support up to -40°C to +85°C Compact 68-QFN package for space-constrained designs #W55RP20 #WIZnet #RP2040 #EthernetMCU #IoT #EmbeddedSystems #IndustrialAutomation #TCPIP #EthernetController #Microcontroller #HardwareTCPIP #Networking #EmbeddedDesign #SmartDevices #IoTDevelopment