{"id":8477,"date":"2026-06-29T02:54:14","date_gmt":"2026-06-29T02:54:14","guid":{"rendered":"https:\/\/materialparts.com\/ksz8091mnxia-tr\/"},"modified":"2026-06-29T06:27:59","modified_gmt":"2026-06-29T06:27:59","slug":"ksz8091mnxia-tr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ksz8091mnxia-tr\/","title":{"rendered":"KSZ8091MNXIA-TR"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The KSZ8091MNXIA-TR from Microchip is a single-chip 10BASE-T\/100BASE-TX IEEE 802.3-compliant Ethernet physical-layer transceiver (PHY) with MII interface in a 32-pin QFN (5×5 mm) package. It features on-chip termination resistors, an integrated 1.2V core regulator, Energy Efficient Ethernet (EEE), Wake-on-LAN (WoL), and LinkMD TDR-based cable diagnostics, operating from a single 3.3V supply with flexible 1.8\/2.5\/3.3V digital I\/O.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6570\u636e\u901f\u7387<\/td>\n10\/100 Mbps<\/td>\n<\/tr>\n
Interface<\/td>\nMII (MNX variant)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/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 (differential pairs)<\/td>\n<\/tr>\n
Internal Regulator<\/td>\n1.2V core (built-in)<\/td>\n<\/tr>\n
EEE Support<\/td>\nYes (IEEE 802.3az)<\/td>\n<\/tr>\n
Wake-on-LAN<\/td>\nYes (magic packet, link change, custom packet)<\/td>\n<\/tr>\n
Cable Diagnostics<\/td>\nLinkMD TDR-based<\/td>\n<\/tr>\n
Auto MDI\/MDI-X<\/td>\nYes (HP Auto)<\/td>\n<\/tr>\n
Management Interface<\/td>\nMDC\/MDIO (Clause 22)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n32-pin QFN-EP (5 x 5 x 0.85 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Single-chip 10\/100 Ethernet PHY with IEEE 802.3 compliance<\/li>\n
  • On-chip termination resistors reduce BOM cost and simplify layout<\/li>\n
  • Integrated 1.2V regulator eliminates external LDO for core supply<\/li>\n
  • Energy Efficient Ethernet (EEE) for reduced power during idle periods<\/li>\n
  • Wake-on-LAN with magic packet, link status change, or custom packet detection<\/li>\n
  • LinkMD TDR cable diagnostics identify faulty copper cabling<\/li>\n
  • HP Auto MDI\/MDI-X for automatic crossover detection and correction<\/li>\n
  • Programmable interrupt output and LED indicators<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • IP phones and VoIP endpoints<\/li>\n
    • IP set-top boxes and smart TVs<\/li>\n
    • Game consoles and printers<\/li>\n
    • Industrial Ethernet nodes<\/li>\n
    • Embedded systems with 10\/100 Ethernet connectivity<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The KSZ8091MNXIA-TR from Microchip is a single-chip 10BASE-T\/100BASE-TX IEEE 802.3-compliant Ethernet physical-layer transceiver (PHY) with MII interface in a 32-pin QFN (5×5 mm) package. It features on-chip termination resistors, an integrated 1.2V core regulator, Energy Efficient Ethernet (EEE), Wake-on-LAN (WoL), and LinkMD TDR-based cable diagnostics, operating from a single 3.3V supply with flexible […]<\/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":[],"chip_brand":[134],"class_list":["post-8477","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-microchip"],"acf":{"brief_explanation":"10\/100 Ethernet PHY, MII, on-chip termination, EEE, WoL, LinkMD, 32-QFN 5x5mm","date_code":"","package_case":"QFN-32 EP (5 x 5 x 0.85 mm)","in_stock":3951,"datasheet":"https:\/\/www.microchip.com\/en-us\/product\/ksz8091","price":"$1.60 @ 1ku","product_introduction":"The Microchip KSZ8091MNXIA-TR is a single-supply 10BASE-T\/100BASE-TX Ethernet physical-layer transceiver for transmission and reception of data over standard CAT-5 UTP cable. As a highly integrated PHY solution, it reduces board cost and simplifies layout by integrating on-chip termination resistors for differential pairs, a low-noise 1.2V core regulator, and flexible 1.8\/2.5\/3.3V digital I\/O voltage support. The MNX variant provides the Media Independent Interface (MII) for direct connection to MII-compliant Ethernet MAC processors and switches. Energy Efficient Ethernet (EEE) reduces power during idle traffic, while Wake-on-LAN enables system wakeup from standby mode. LinkMD TDR-based cable diagnostics and parametric NAND tree support facilitate system bring-up and production testing.","working_principle":"The KSZ8091MNXIA-TR operates as an Ethernet PHY layer transceiver that encodes and decodes data between the MAC-side MII interface and the line-side differential TX\/RX pairs connected to the RJ-45 magnetics. On the transmit path, 4-bit nibble data from the MAC via MII is encoded using 4B\/5B coding (100BASE-TX) or Manchester encoding (10BASE-T), scrambled, and driven onto the differential TXP\/TXN pair through an internal line driver with on-chip 50-ohm termination. On the receive path, the differential signal from the cable is equalized, decoded, and presented as 4-bit nibble data on the MII RXD[3:0] bus synchronized to RXC. Auto-negotiation selects the highest common speed and duplex mode. The integrated 1.2V regulator powers the digital core from the 3.3V supply, eliminating an external LDO. The MDC\/MDIO management interface provides register-level access for configuration, status monitoring, and cable diagnostics via the LinkMD TDR function.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>VDD<\/td>3.3V Analog Supply<\/td><\/tr>
      2<\/td>RXP<\/td>Receive Positive (differential pair)<\/td><\/tr>
      3<\/td>RXN<\/td>Receive Negative (differential pair)<\/td><\/tr>
      4<\/td>VDD<\/td>3.3V Analog Supply<\/td><\/tr>
      5-7<\/td>PHYAD[2:0]<\/td>PHY Address strapping pins<\/td><\/tr>
      8<\/td>MDC<\/td>Management Data Clock<\/td><\/tr>
      9<\/td>MDIO<\/td>Management Data I\/O<\/td><\/tr>
      10<\/td>VDDIO<\/td>Digital I\/O Supply (1.8\/2.5\/3.3V)<\/td><\/tr>
      11-14<\/td>RXD[3:0]<\/td>MII Receive Data<\/td><\/tr>
      15<\/td>RXDV<\/td>MII Receive Data Valid<\/td><\/tr>
      16<\/td>RXER<\/td>MII Receive Error<\/td><\/tr>
      17<\/td>RXC<\/td>MII Receive Clock (2.5\/25 MHz)<\/td><\/tr>
      18<\/td>CONFIG2<\/td>Configuration strapping (MII mode select)<\/td><\/tr>
      19<\/td>INT\/PME_N2<\/td>Interrupt \/ PME output<\/td><\/tr>
      20<\/td>TXP<\/td>Transmit Positive (differential pair)<\/td><\/tr>
      21<\/td>TXN<\/td>Transmit Negative (differential pair)<\/td><\/tr>
      22<\/td>TXC\/PME_EN<\/td>MII Transmit Clock \/ PME enable strap<\/td><\/tr>
      23<\/td>TXEN<\/td>MII Transmit Enable<\/td><\/tr>
      24-27<\/td>TXD[3:0]<\/td>MII Transmit Data<\/td><\/tr>
      28-29<\/td>COL\/CRS<\/td>MII Collision\/Carrier Sense + config straps<\/td><\/tr>
      30<\/td>LED0\/NWAYEN<\/td>LED output \/ Auto-Negotiation enable strap<\/td><\/tr>
      31<\/td>TXER<\/td>MII Transmit Error \/ EEE LPI control<\/td><\/tr>
      32<\/td>RST#<\/td>Chip Reset (active low)<\/td><\/tr><\/table>","application_scenarios":"
      • IP Phone \/ VoIP<\/b>: Single-port 10\/100 PHY with WoL for always-on VoIP endpoints and EEE reducing power during idle call periods<\/li>
      • Industrial Ethernet<\/b>: LinkMD cable diagnostics for field installation verification in factory automation and process control nodes<\/li>
      • Smart TV \/ Set-Top Box<\/b>: Integrated termination and regulator minimize BOM in cost-sensitive consumer entertainment devices<\/li>
      • Embedded System<\/b>: Flexible 1.8-3.3V VDDIO allows direct MII connection to low-voltage FPGAs and SoCs without level shifters<\/li>
      • Printer \/ MFP<\/b>: 10\/100 Ethernet connectivity with Auto MDI\/MDI-X for plug-and-play network cable connection<\/li><\/ul>","alternative_models":"
        Model<\/th>Brand<\/th>Speed<\/th>Interface<\/th>Package<\/th><\/tr>
        KSZ8081MNXIA-TR<\/td>Microchip<\/td>10\/100<\/td>MII\/RMII<\/td>QFN-32<\/td><\/tr>
        RTL8201F-VB-CG<\/td>Realtek<\/td>10\/100<\/td>MII\/RMII<\/td>QFN-32<\/td><\/tr>
        DP83848JVVB<\/td>TI<\/td>10\/100<\/td>MII\/RMII<\/td>LQFP-48<\/td><\/tr>
        LAN8720A<\/td>Microchip<\/td>10\/100<\/td>RMII<\/td>QFN-24<\/td><\/tr>
        KSZ9031RNXIA<\/td>Microchip<\/td>10\/100\/1000<\/td>RGMII<\/td>QFN-48<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=8477"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8477\/revisions"}],"predecessor-version":[{"id":8478,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8477\/revisions\/8478"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8477"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}