YT8531SH-CA

The YT8531SH-CA is the industrial-grade QFN-48 code for the Motorcomm YT8531S single-port Gigabit Ethernet PHY, in mass production. It implements 10BASE-Te, 100BASE-TX and 1000BASE-T over CAT.5e with 120 m reach at gigabit rate, connects to the MAC over RGMII with selectable 3.3 V, 2.5 V or 1.8 V signaling or over SerDes (SGMII/1000BASE-X), and supports fiber-to-UTP media-converter mode, IEEE 802.3az Energy Efficient Ethernet, Synchronous Ethernet and Wake-on-LAN, at under 400 mW from 3.3 V and 1.1 V rails. It is the domestic second source designed against the AR8033, KSZ9031 and 88E1111 class of PHYs for routers, switches, PON equipment and industrial networking. Selection advice: the SH code is the SerDes-capable industrial variant in a 48-pin QFN, distinct from the 40-pin RGMII-only family members, so match the code to your MAC interface before layout; Motorcomm also lists LRE100-4 long-reach support for 400 m links at 100 Mbps on this family. Parameters verified against Motorcomm documentation.