OS81118AF-D2A-020400-V11

Controllers Overview

The OS81118AF-D2A-020400-V11 is a MOST150 Intelligent Network Interface Controller (INIC) from Microchip Technology. It provides a 150 Mbits/s MOST network bandwidth and integrates a USB 2.0 high-speed device port for connecting external modules. The device supports both optical physical layer (oPHY) and coax physical layer (cPhy) interfaces, enabling flexible network topologies. It features an embedded MediaLB controller, two configurable streaming ports, and operates within an ambient temperature range of -40°C to +85°C. The component is housed in a lead-free, RoHS-compliant 72-pin QFN package measuring 10 × 10 mm.

Controllers Feature Summary

• Integrates a USB 2.0 high-speed device port supporting both physical layer and High-Speed Inter-Chip (HSIC) interfaces for versatile host connectivity.
• Supports low-cost LED/POF-based optical physical layers and integrated coaxial transceivers for dual-simplex or full-duplex communication.
• Includes an embedded MediaLB controller with high-speed differential mode and legacy single-ended mode support.
• Features two configurable streaming ports capable of routing industry-standard synchronous audio and isochronous video streams.

Controllers Applications

• In-car mobile and Wi-Fi connectivity systems utilizing 3G/LTE and Wi-Fi modules connected via the USB port.
• Head unit designs incorporating multi-core consumer System-on-Chips (SoCs) into automotive MOST networks.
• Rear-seat entertainment systems and peripheral devices requiring IP data transmission over the MOST network.

Controllers Procurement Notes

Verify the specific ordering suffix against the official datasheet to confirm interface variants and package options. Ensure compatibility with system voltage requirements, noting that 1.2 V operation is mandatory only when utilizing the HSIC interface. Confirm environmental ratings match the target application's thermal constraints before finalizing procurement.

Controllers Selection Notes

Select this INIC for applications requiring seamless integration of consumer SoCs into automotive MOST150 networks. Choose based on the required physical layer; use the coax variant if cPhy is needed, though availability may vary by specific part number. Consider the USB port capabilities for handling IP and isochronous data transfers efficiently alongside the dedicated streaming ports for low-latency audio.

Controllers Part Context

This component belongs to the OS81118 family of MOST150 Intelligent Network Interface Controllers. It serves as a bridge between high-speed USB hosts and the MOST media network, facilitating data exchange for infotainment and connectivity services. The architecture allows for efficient management of network bandwidth and security through embedded network management features.

Controllers Replacement Considerations

Consult Microchip documentation for direct substitutes within the OS81118 series. Verify pinout and electrical specifications carefully when considering alternative INICs, as physical layer support and interface configurations may differ significantly across product lines.

Controllers FAQ

Does the OS81118 support both optical and coaxial physical layers?

Yes, the OS81118 supports low-cost LED/POF-based optical physical layers and includes an integrated coaxial transceiver for coax physical layer communication, depending on the specific product variant.

What are the supported operating voltages for the OS81118?

The device supports operating voltages of 1.2 V, 1.8 V, and 3.3 V. The 1.2 V supply is specifically required when the HSIC interface is utilized.

How does the OS81118 handle network security and protection?

The device includes embedded MOST network management features such as network protection mode, hardware and application watchdog timers, and intelligent muting to ensure system safety and reliability.