Microchip Technology Inc


In Production

For product comparison, please consider: OS81119, OS81110
View Side By Side Comparison

OS81118 is available for following applications

• MOST150 Coaxial Networks (MOST150 cPHY)
• MOST150 Optical Networks (MOST150 oPHY)

General Description

The OS81118 is a Single Network Port highly integrated Intelligent Network Interface Controller (INIC) for the 150 Mbps MOST Network (MOST150) with support for both optical physical layers (oPHY) and coaxial (coax) physical layers (cPHY) that can efficiently handle audio, video, packet, and control data for infotainment and Advanced Driver Assistance Systems (ADAS).

On cPHY it point to point connections with the support of full-duplex communication. This feature contributes to reduce the total system costs through the reduced number of cables and connectors that are necessary to connect the single devices.

The classic ring topology with dual-simplex communication is supported by oPHY and cPHY.

The OS81118 offers following state-of-the-art industry standards as user interfaces: I2C, Streaming Port, MediaLB, SPI, USB2.0 high speed port. From software side, it is compatible with MOST Linux® Driver,MOST NetServices, and the Microchip’s Unified Centralized Network Stack (UNICENS).

INIC provides encapsulation of all low-level functions necessary to develop a MOST-compliant device, significantly simplifying MOST implementation in a node. Supervision of the application is also provided, including a protection mode that is entered when an application is not present (i.e. start-up) or the External Host Controller (EHC) malfunctions. This protection mode prevents application malfunctions from influencing the integrity of the network and the system.

INIC includes the INIC Software Stack, which provides MOST-compliant real-time behavior. Integration of the INIC Software Stack significantly relieves the EHC from real-time processing tasks.

The INIC makes a MOST device accessible according to the rules of the MOST Specification, even without participation from the External Host Controller (EHC). The INIC provides a message-based interface for control and packet data. Configuration is encapsulated within a Function Block (FBlock INIC), which allows the EHC to manage INIC in the same way as other functions in the system.

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



        • 150 Mbits/s MOST network bandwidth
        • Intelligent Network Interface Controller architecture that provides a complete network interface on a single chip
        • Supports low-cost LED/POF-based optical physical layer and coax physical layer
          • LVDS interfaces for FOTs
          • Integrated coaxial transceiver(*) supports dual-simplex as well as full-duplex communication
        • Supports state-of-the-art industry standard streaming and packet formats
          • Synchronous audio streams (PCM)
          • Isochronous audio/video streams such as (MPEG, H-264)
          • Ethernet packets for TCP/IP-based applications
          • IEEE MAC addressing by using MOST Ethernet Packets (MEPs)
          • 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 MOST network management
          • Network protection mode
          • Hardware and application watchdog timer
          • Intelligent muting
        • Provides remote control mode capability
        • Is compatible with UNICENS
        • MOST Technology Linux Driver available
        • Universal Serial Bus (USB) Port supports high-speed USB 2.0 upstream data transfers using either
          • USB 2.0 physical layer
          • High-Speed Inter-Chip (HSIC) physical layerm
        • Powerful MediaLB® controller
          • High-speed differential mode
          • Legacy single-ended mode
        • Two configurable Streaming Ports
          • Two serial data pins per port
          • Capable of routing streaming  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
        • 72-pin QFN (10 x 10 mm x mm)
        • Lead-free, RoHS-compliant package
        • Wettable flanks
        • Ambient Temperature range: -40 °C to +85 °C
        * Not available on all product variants.
        ** Required only when the HSIC interface is used.
    Parameter Name
    MOST Speed Grade
    150 Mbps
    PHY Type
    optical, coax (integrated) (*)
    I2C, Streaming Port, MediaLB, SPI, USB
    Content Protection Support
    with companion IC
    Operating Voltage (V)
    Temperature Range (°C)
    -40 to 85