Ethernet PHY chip, Infrared Data, industrial equipment, ethernet PHY module - tatanh1983/conchodom GitHub Wiki
KSZ8721B Series 2.5 V 10/100 Base TX/FX Physical Layer Transceiver - LQFP-48
https://www.futureelectronics.com/p/semiconductors--comm-products--phy/ksz8721bli-microchip-6275010