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150 Mbps Dual Port INIC

Status: In Production

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Device Overview


INICnet Dual Port Intelligent Network Interface Controller

OS81119 is available for following applications

• INICnet 150 Coaxial Networks (cPHY)
• INICnet 150  Optical Networks (oPHY)
• INICnet 150  Hybrid Networks 

General Description

The OS81119 is a dual network port Intelligent Network Interface Controller (INIC) for the 150 Mbps INICnet Network with support for both optical physical layers (oPHY) and coaxial physical layers (cPHY) that can efficiently handle audio, video, packet, and control data for infotainment and Advanced Driver Assistance Systems (ADAS).

The cPHY enables daisy chain INICnet 150 Networks with the support of full-duplex communication, reducing the total system costs through the reduced number of cables and connectors. The classic ring topology with dual-simplex communication is supported by oPHY and cPHY. Hybrid topologies combining ring and daisy chains are also possible, providing additional flexibility.

The OS81119 offers industry-standard interfaces to peripheral components: I2C, I2S (and similar formats) audio streaming ports, MediaLB, SPI, USB 2.0. The MediaLB and USB ports support all data types (stream, packet, control) simplifying connections for a wide variety of applications. INICs include a powerful stream-data routing engine that links application ports to network channels and allows dynamic reconfiguration.

Microchip’s Unified Centralized Network Stack (UNICENS) supports establishing of all network connected data resources from one point in the network, enabling simple, yet full featured network connections. Software support for interfacing to the INIC’s data I/O ports in Linux applications is provided by the native driver included in Automotive Grade Linux. A QNX driver for the USB interface is available.  For MOST implementations, a variety of software support is available.

INIC encapsulate all low-level network-management functions relieving the External Host Controller (EHC) from the burden of managing real-time network tasks. INICs monitor and manage a variety of network conditions to support robust network functionality and fault detection and recovery. A built-in watchdog protects the network from EHC faults. INIC protection mode prevents application malfunctions from influencing the integrity of the network and system. INICs also provide support for device power management.

Remote control functionality is supported obviating the need for an EHC in certain, “slim” applications. The INIC can be fully configured and managed through the network. Peripheral components can be configured / monitored via I2C tunneling.

Optionally IP-based system management can be supported via the Ethernet packet channel providing seamless integration of the multimedia network with Ethernet networking in other vehicle domains.

To purchase the OS81119 or obtain additional information, please contact any Microchip sales representative or authorized worldwide distributor.

For product comparison, please consider: OS81118, OS81110

Additional Features
  • 150 Mbits/s network bandwidth
  • Intelligent Network Interface Controller architecture that provides a complete network interface on a single chip
  • Two network ports
  • Supports low-cost LED/POF-based optical physical layer (oPhy) and coax physical layer (cPhy)
    • LVDS interfaces for FOTs
    • Integrated coaxial transceiver supports dual-simplex as well as full-duplex communication
  • Enables daisy chain topology and hub configuration with full-duplex communication on cPhy
  • Supports ring topology(*) with dual-simplex communication on oPhy and cPhy
  • Enables hybrid physical layers and hybrid topologies
  • Supports coaxial system diagnosis on full-duplex cPhy
    • No need of extra wiring or hardware
    • Checks node presence
    • Gathers information from all nodes in the network
    • Can trigger cable link diagnosis
  • Supports legacy Ring Break Diagnosis on oPhy and dual-simplex cPhy
  • Supports state-of-the-art industry standard streaming and packet formats
    • Synchronous audio streams (PCM, TDM)
    • Isochronous audio/video streams such as (MPEG, H-264)
    • Ethernet frame transport for packet-data applications
    • IEEE MAC addressing for Ethernet Packets
    • MOST High packets for lean file transfer to small micro controllers with small memory
    • Clock distribution over the network
  • Flexible management of available bandwidth
  • Embedded network management
    • Network protection mode
    • Hardware and application watchdog timer
    • Stream source monitoring
    • Intelligent muting
    • Lost node detection and recovery
  • Remote control capability
  • Compatible with UNICENS for resource configuration
  • Linux Driver available
  • Universal Serial Bus (USB) Port supports high-speed USB 2.0 data transfers using either
    • USB 2.0 physical layer
    • High-Speed Inter-Chip (HSIC) interface
  • MediaLB® controller
    • High-speed differential mode
    • Legacy single-ended mode
  • Two configurable Streaming Ports
    • Two serial data pins per port
    • Capable of routing stream data in industry standard formats
    • Sequential mode with max. 512xFs on each of the four streaming port pins available
  • Operating voltages: 1.2 V(**)/1.8 V/3.3 V
  • 88-pin QFN (12 x 12 mm)
  • Lead-free, RoHS-compliant package
  • Wettable flanks
    • Ambient Temperature range: -40 °C to +85 °C
  • * Ring topology is not available on all ports, if coaxial PHY is used.
  • ** Required only when the HSIC interface is used.
Speed Grade
150 Mbps
PHY Type
Dual Port: optical, coax (integrated)
I2C, I2S, MediaLB, SPI, USB
Content Protection Support
with companion IC
Operating Voltage (V)
Temperature Range (C*)(Junction)
-40 to 125


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