{"id":10381,"date":"2026-07-19T13:07:33","date_gmt":"2026-07-19T13:07:33","guid":{"rendered":"https:\/\/ic-vendor.com\/ksz8081rnbia-2\/"},"modified":"2026-07-19T13:07:33","modified_gmt":"2026-07-19T13:07:33","slug":"ksz8081rnbia-2","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/ar\/ksz8081rnbia-2\/","title":{"rendered":"KSZ8081RNBIA"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The Microchip KSZ8081RNBIA is a single-supply 10BASE-T\/100BASE-TX Ethernet physical-layer transceiver (PHY) with RMII v1.2 interface support. Housed in a 32-pin QFN (5×5 mm) package, it integrates on-chip termination resistors for differential pairs and a low-noise 1.2V core regulator, reducing board cost and simplifying layout. It operates from a single 3.3V supply with configurable 1.8V\/2.5V\/3.3V digital I\/O voltage support across the industrial temperature range of -40\u00b0C to +85\u00b0C.<\/p>\n

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Standard<\/td>\nIEEE 802.3 10\/100 Ethernet<\/td>\n<\/tr>\n
MAC Interface<\/td>\nRMII v1.2 (MII on MNX variant)<\/td>\n<\/tr>\n
Port Speed<\/td>\n10\/100 Mbps<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n3.3V (single supply)<\/td>\n<\/tr>\n
Digital I\/O Voltage<\/td>\n1.8V \/ 2.5V \/ 3.3V<\/td>\n<\/tr>\n
On-Chip Termination<\/td>\nYes<\/td>\n<\/tr>\n
Auto MDI\/MDI-X<\/td>\nYes (HP Auto MDIX)<\/td>\n<\/tr>\n
Cable Diagnostics<\/td>\nLinkMD TDR-based<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +85 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n32-QFN (5×5 mm)<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • Single-chip IEEE 802.3 compliant 10\/100 Ethernet PHY transceiver<\/li>\n
  • RMII v1.2 with 50MHz reference clock output to MAC<\/li>\n
  • On-chip termination resistors for differential pairs reduce BOM<\/li>\n
  • Integrated 1.2V low-noise core regulator<\/li>\n
  • HP Auto MDI\/MDI-X for automatic crossover detection<\/li>\n
  • LinkMD TDR-based cable diagnostics for fault identification<\/li>\n
  • Programmable interrupt output and LED indicators<\/li>\n
  • Power-down and power-saving modes for low-power operation<\/li>\n
  • HBM ESD rating of 6 kV<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Industrial Ethernet and factory automation<\/li>\n
    • IP phones and VoIP gateways<\/li>\n
    • IP set-top boxes and smart TVs<\/li>\n
    • Game consoles and consumer electronics<\/li>\n
    • Printers and networked peripherals<\/li>\n
    • LAN on Motherboard (LOM) designs<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The Microchip KSZ8081RNBIA is a single-supply 10BASE-T\/100BASE-TX Ethernet physical-layer transceiver (PHY) with RMII v1.2 interface support. Housed in a 32-pin QFN (5×5 mm) package, it integrates on-chip termination resistors for differential pairs and a low-noise 1.2V core regulator, reducing board cost and simplifying layout. It operates from a single 3.3V supply with configurable […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[1682],"chip_brand":[134],"class_list":["post-10381","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-ksz8081rnbia","chip_brand-microchip"],"acf":{"brief_explanation":"10\/100 Ethernet PHY with RMII, 3.3V single supply, on-chip termination, 32-QFN","date_code":"","package_case":"32-QFN (5x5 mm)","in_stock":8742,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/KSZ8081MNX-RNB-Data-Sheet-DS00002202C.pdf","price":"$1.07 @ 1ku","product_introduction":"The Microchip KSZ8081RNBIA is a highly integrated single-supply 10BASE-T\/100BASE-TX Ethernet physical-layer transceiver designed for transmission and reception of data over standard CAT-5 UTP cable. It reduces board cost and simplifies layout by integrating on-chip termination resistors for the differential pairs and a low-noise regulator to supply the 1.2V core. The RMII v1.2 interface provides direct connection to RMII-compliant MACs in Ethernet processors and switches. A 25MHz crystal generates all required clocks, including the 50MHz RMII reference clock output for the MAC. The KSZ8081RNBIA is ideal for industrial, consumer, and embedded networking applications requiring reliable 10\/100 Ethernet connectivity.","working_principle":"The KSZ8081RNBIA operates as a physical-layer transceiver bridging the MAC layer and the physical Ethernet medium. 1) RMII Interface Subsystem: The Reduced Media Independent Interface connects to the MAC via a 2-bit wide data bus with a 50MHz reference clock, enabling compact designs with fewer signal lines than MII. 2) PHY Core Subsystem: The 100BASE-TX PCS\/PMA performs 4B\/5B encoding\/decoding, MLT-3 scrambling\/descrambling, and digital signal processing for transmit and receive data streams. 3) Analog Front-End Subsystem: Integrated termination resistors and line drivers\/receivers interface directly with the magnetics and RJ-45 connector for the copper medium. 4) Management Subsystem: The MDC\/MDIO serial management interface provides register-level access for configuration, status monitoring, and LinkMD cable diagnostics using TDR technology.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VDDA_3.3<\/td>Power<\/td>3.3V analog supply<\/td><\/tr>
      2<\/td>TXP<\/td>Output<\/td>Positive transmit differential pair<\/td><\/tr>
      3<\/td>TXM<\/td>Output<\/td>Negative transmit differential pair<\/td><\/tr>
      4<\/td>RXP<\/td>Input<\/td>Positive receive differential pair<\/td><\/tr>
      5<\/td>RXM<\/td>Input<\/td>Negative receive differential pair<\/td><\/tr>
      6<\/td>VDDRCV_3.3<\/td>Power<\/td>3.3V receive analog supply<\/td><\/tr>
      7<\/td>RBIAS<\/td>Analog<\/td>Bias resistor connection<\/td><\/tr>
      8<\/td>XTAL1<\/td>Input<\/td>25MHz crystal input<\/td><\/tr>
      9<\/td>XTAL2\/CLKIN<\/td>Output<\/td>Crystal output \/ external clock input<\/td><\/tr>
      10<\/td>RST#<\/td>Input<\/td>Active-low reset<\/td><\/tr>
      11-22<\/td>RMII\/MDC\/MDIO\/LED<\/td>I\/O<\/td>RMII data, management, and LED pins<\/td><\/tr>
      23<\/td>INTRP<\/td>Output<\/td>Programmable interrupt output<\/td><\/tr>
      24-32<\/td>VDD\/GND\/CFG<\/td>Power\/Config<\/td>Power, ground, and configuration strap pins<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial Ethernet: Factory automation and process control communication nodes<\/li>
      • Consumer Electronics: IP set-top boxes, smart TVs, and game consoles<\/li>
      • Networking Peripherals: Printers, IP phones, and VoIP gateways<\/li>
      • Embedded Systems: LAN on Motherboard (LOM) for server and embedded platforms<\/li>
      • IoT Gateways: 10\/100 Ethernet connectivity for IoT edge devices<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Realtek<\/td>RTL8201F-VB-CG<\/td>QFN-32<\/td>10\/100 PHY, RMII, similar footprint<\/td><\/tr>
        Microchip<\/td>KSZ8041NL<\/td>LQFP-48<\/td>10\/100 PHY with MII interface<\/td><\/tr>
        TI<\/td>DP83848C<\/td>LQFP-48<\/td>10\/100 PHY, MII\/RMII, industrial temp<\/td><\/tr>
        Microchip<\/td>KSZ8081MNX<\/td>QFN-32<\/td>MII variant of same family<\/td><\/tr>
        ADI<\/td>ADIN1300<\/td>QFN-40<\/td>10\/100\/1000 PHY, higher performance<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/10381","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/comments?post=10381"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/10381\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/media?parent=10381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/categories?post=10381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/tags?post=10381"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=10381"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}