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LAN8770M-I/PRA

LAN8770M-I/PRA thumbnail
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

Properties

LAN8770M-I/PRA

Microchip

Ethernet

microchip.com/downloads/en/DeviceDoc/LAN8770-Product-Brief-DS00002550C.pdf

IC

Base

32-VQFN

parametric-v1

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