The KSZ8081 is a highly integrated, single-chip Physical Layer (PHY) transceiver designed for low-power and cost-sensitive applications.
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The prefix is unmistakably associated with Microchip Technology (formerly Micrel Inc.). Microchip’s KSZ series is world-famous for Ethernet PHY (Physical Layer Transceivers) and integrated Ethernet switches. ksz80 ob s4lv02 datasheet