Ksz80 Ob S4lv02 Datasheet -

Cross-reference with distributor search (Digi-Key, Mouser) and contact vendor support with the full marking on the physical IC.

Assuming "KSZ80 OB S4LV02" is a KSZ8081, here are the definitive specifications you would find in the datasheet:

| Parameter | Value | | :--- | :--- | | Standard | IEEE 802.3 / 802.3u (10Base-T, 100Base-TX) | | Interface | MII (Medium Independent Interface) or RMII (Reduced MII) | | Auto-Negotiation | Yes (Full/Half Duplex, 10/100 Mbps) | | HP Auto MDI-X | Yes (Auto crossover detection) | | Supply Voltage | 3.3V for VDDIO; 1.2V internal regulator or external | | Operating Temp | Industrial: -40°C to +85°C (Check "OB" for extended range) | | Package | 24-pin QFN (4x4 mm) or 32-pin QFN (5x5 mm) | | LED Support | Link, Activity, Speed, Duplex (configurable via strapping) |

| Part you see | Real part | Type | |--------------|-----------|------| | S4LV02 | Sony CXK4S4LV02 | 2Mbit Low-Voltage SRAM | | KSZ80 | Possibly KSZ8721 or KSZ8081 | Ethernet PHY/switch | ksz80 ob s4lv02 datasheet

They are two different chips combined in a BOM or silkscreen label “KSZ80 OB S4LV02” as a board assembly code or handwritten note.

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If you can share a photo of the chip marking and package, I can likely identify it exactly. Would you like help searching a specific manufacturer database instead? Assuming "KSZ80 OB S4LV02" is a KSZ8081, here

Here is the correction of the text:

Please check the physical IC marking again. Look for: If you can share a photo of the

Then:

Use manufacturer part marking lookup tools:

In semiconductor marking, "OB" is rarely a model number. Instead, it typically represents:

Important Note: "OB" is not a standard speed grade or temperature range in official Microchip datasheets. Official suffixes are usually -TLI (Industrial temp, Tape & Reel) or -TR etc. Therefore, "OB" is likely a customer-specific marking or a date/lot identifier.