Ksz80 Ob S4lv02 Datasheet [upd] -

+--------------------------------------------+ | Microchip KSZ80 PHY | | | | +-------------------+ | | | On-Chip LDO | <--- 3.3V Main VDD | | | (1.2V Core) | | | +-------------------+ | | | | +-------------------+ | | | MII / RMII | <==> To Host MAC | | | Interface | (Variable I/O) | | +-------------------+ | | | | +-------------------+ | | | LinkMD® TDR | <==> MDI (RJ45 / | | | Cable Diagnostics| Magnetics) | | +-------------------+ | +--------------------------------------------+ Media Independent Interfaces (MII vs. RMII)

The chip contains an internal LDO regulator that drops 3.3V down to 1.2V to power the high-speed digital core.

Identifies the core family line (KSZ80xx series 10/100 Ethernet PHY). ksz80 ob s4lv02 datasheet

Ultra-low power design with advanced power-down and power-saving modes.

Application circuits and reference designs It provides a 50 MHz reference clock output

Use the electrical and timing specifications from that document, and consult the specific board’s hardware manual for the strapping configuration of "OB S4LV02."

: Supports 10 Mbps and 100 Mbps Ethernet over CAT-5 unshielded twisted pair (UTP) cable. Power Supply ksz80 ob s4lv02 datasheet

Keep trace lengths symmetrical and match load capacitors to the crystal vendor specifications.

It provides a 50 MHz reference clock output to the MAC, reducing the need for an external clock source.