Ksz80 Ob S4lv02 Datasheet May 2026

The Microchip KSZ8081RNA-S4LV02 is a 10Base-T/100Base-TX Ethernet PHY transceiver utilizing RMII v1.2, designed for low-power, space-constrained industrial and consumer applications. Featuring a 24-pin QFN package, it offers 6 kV ESD protection, HP Auto MDI/MDI-X, and LinkMD diagnostics, though it lacks Energy Efficient Ethernet (EEE) and requires software-based configuration for many settings. Read the full details on the Microchip website. KSZ8081 - Microchip Technology

The reference KSZ80-0B-S4LV02 corresponds to a TV Scaler PCB Board

used in LED and LCD television repairs. While the board name begins with "KSZ80," it is distinct from the standalone Microchip KSZ80 series Ethernet PHY integrated circuits, though it likely utilizes a component from that family for network functionality. Board Overview: KSZ80-0B-S4LV02 This board is a specialized Panel Scaler PCB

designed for managing the display and signal processing within a television. Application : LED and LCD TV repair and assembly.

: Acts as the interface between the main TV motherboard and the display panel (scaler board). : Original replacement part for compatible TV models. Integrated Component: KSZ8081 Series Features Since these boards often feature Microchip's

Ethernet transceivers for smart TV connectivity, the following technical specifications generally apply to the underlying network hardware on such boards: Ethernet Standard

: Single-chip 10Base-T/100Base-TX IEEE 802.3-compliant transceiver. Data Rates : Supports 10 Mbps and 100 Mbps operations. : Typically supports

(Reduced Media Independent Interface) for connection to host processors. Power Supply

: Single 3.3V power supply with an internal 1.2V regulator for the core. Key Features HP Auto MDI/MDI-X

: Automatically detects and corrects crossover or straight-through cable connections. LinkMD® Diagnostics

: TDR-based cable diagnostics to identify shorts, opens, or cable faults. Wake-on-LAN (WOL) : Support for remote wake-up via specific network packets. Diagnostics

: Includes loopback modes and parametric NAND tree support for manufacturing fault detection. Microchip Technology Common Variants on Scaler Boards

Depending on the specific TV model, you may encounter different versions of the underlying PHY chip: KSZ8081RNA ksz80 ob s4lv02 datasheet

: Optimized for space-constrained designs, often used in smaller 24-pin QFN packages. KSZ8081RNB

: Features more dedicated pins for LED status outputs and hardware configuration strapping. Microchip Technology wiring diagram for this specific scaler board, or do you need a list of compatible TV models for replacement? KSZ8081 | Microchip Technology

Overview. Alternate products. Automotive:No. DownstreamPorts:1. Energy Efficient Ethernet:No. EtherCAT:Yes. Port Speed:10/100Mbps. Microchip Technology KSZ8081MNX/RNB Data Sheet - Microchip Technology

The KSZ80 series, developed by Microchip Technology , consists of high-performance 10/100BASE-TX Ethernet physical layer transceivers (PHY) designed for low power consumption and compact board space. The specific designation "KSZ80 OB S4LV02" typically refers to custom-labeled or assembly-specific markings for the KSZ8001 or KSZ8081 family of transceivers often found in industrial networking equipment. KSZ8081MNX/RNB Data Sheet - Microchip Technology

KSZ80-0B-S4LV0.2 isn't just a string of characters; it is a critical LED/LCD TV Scaler PCB Board

. While "KSZ80" often refers to a family of high-performance Ethernet PHY transceivers manufactured by Microchip Technology , in the context of the

revision, it represents the "brain" of a television's display panel. The Story of a TV’s Revival

Imagine a high-definition LED TV that suddenly goes dark. The backlight might be on, but the images—the vibrant colors of a nature documentary or the sharp lines of a video game—have vanished. Inside, the culprit is often a failed scaler board. The Diagnosis : A technician opens the chassis and identifies the KSZ80-0B-S4LV0.2 PCB

. This specific board is responsible for taking incoming video signals and "scaling" them to fit the exact resolution of the LCD panel. The Component : The board likely utilizes a KSZ80 series chip , such as the Microchip KSZ8081 , which manages data transmission at 100Mbps speeds The Repair : Finding an KSZ80_0B_S4LV0.2 board is essential for maintaining the original display quality

. Because these parts are often pre-owned and salvaged from "screen-damaged" units, they undergo rigorous testing by certified technicians to ensure they can still process signals perfectly. The Result : Once swapped, the tiny transceivers and controllers begin their work again. Data flows through the RMII or MII interfaces , and the TV "wakes up," returning to its former glory. Key Technical Specifications

Exam: KSZ80 OB S4LV02 — Advanced Technical Examination Instructions: Answer all questions. Show calculations and reasoning where applicable. Use SI units. Total points: 100.

Section A — Fundamental understanding (20 points) (5 pts) Give a concise functional summary (3–4

1. (5 pts) Give a concise functional summary (3–4 sentences) of a typical Ethernet PHY/switch IC datasheet, listing the main features you would expect to find.
2. (5 pts) Explain the difference between a PHY, a MAC, and a switch IC. Give one example use-case for each.
3. (10 pts) Describe the typical blocks shown in a block diagram of a multi-port Ethernet switch IC (e.g., MACs, PHYs, switch fabric, MDIO, CPU interface, VLAN engine, QoS). For each block, provide the primary function and at least one key parameter or register-related control.

Section B — Electrical characteristics & power (20 points) 4. (8 pts) A datasheet specifies VDD = 3.3 V ±5% and an absolute max of 3.6 V. Explain the difference between recommended operating range and absolute maximum ratings, and describe the risks of operating at the absolute max. 5. (6 pts) Given the device draws 250 mA from 3.3 V at full load, compute power dissipation. If the thermal resistance junction-to-ambient (RθJA) = 45 °C/W and ambient temperature is 50 °C, estimate junction temperature. State whether this is within typical maximum junction rating of 125 °C. 6. (6 pts) The datasheet lists IO voltage tolerant inputs up to 5 V and specifies input clamp current of ±20 mA when input exceeds VDD. Explain proper input protection design to prevent latch-up or damage when interfacing a 5 V signal to the device.

Section C — Timing, interfaces, and signal integrity (20 points) 7. (6 pts) Define the following timing terms usually found in datasheets: tR (rise time), tF (fall time), propagation delay, and setup/hold times. Give typical units and why each matters for high-speed Ethernet signaling. 8. (8 pts) The Ethernet Rx differential pair requires APL (allowed peak-to-peak) common-mode range and a specified differential impedance of 100 Ω. Explain PCB layout guidelines to maintain impedance and minimize reflections between the magnetics and PHY. 9. (6 pts) For an MDIO interface operating at 2.5 MHz, the datasheet specifies maximum tSU (setup) = 100 ns and tH (hold) = 50 ns. Draw or describe the timing window relative to the MDIO clock and explain consequences of violating those timings.

Section D — Registers, configuration, and software (20 points) 10. (6 pts) A register map shows a control register at address 0x00 with bits: bit 15 = reset (self-clearing), bit 12 = speed select (0=10/100, 1=1000), bit 8 = loopback enable. Describe initialization sequence after power-up to enable Gigabit mode, bring the device out of reset, and enable auto-negotiation. 11. (8 pts) Explain how MDIO/MDC transactions read a 16-bit register: outline preamble, start, opcode, PHY address, reg address, turnaround, and data phases. Give the bit lengths for each field per Clause 22. 12. (6 pts) Provide a short algorithm (pseudocode) to poll link status with exponential backoff: check up to 6 times, starting delay 100 ms doubling each attempt, stop early if link is up.

Section E — Reliability, testing, and compliance (10 points) 13. (5 pts) List five reliability or compliance tests (e.g., ESD, thermal cycling, humidity, S-parameter channel test, EMI) that the datasheet might reference, and give one acceptance criterion for each. 14. (5 pts) Describe how to interpret an eye diagram and bit error rate (BER) spec in the datasheet when qualifying a 1000BASE-T PHY.

Section F — Application design and troubleshooting (10 points) 15. (5 pts) Given intermittent link loss at gigabit only, list five plausible hardware causes related to board design or component choices, and the diagnostic step to confirm each. 16. (5 pts) A recommended application schematic shows magnetics, termination resistors, and 0.1 μF decoupling caps near VDD pins. Explain placement and value rationale for decoupling and magnetics relative to the PHY.

Bonus (optional, 10 points) 17. (10 pts) Create a short lab exercise to characterize the device’s power consumption vs

of Ethernet Physical Layer (PHY) transceivers, originally developed by and now maintained by Microchip Technology

While the exact string "ob s4lv02" is not part of the standard commercial part numbers, it likely refers to a specific revision or board marking for chips such as the Official Datasheets for the KSZ80 Series

You can find the comprehensive technical specifications for these transceivers on the Microchip Technology website . Key datasheets include: KSZ8081MNX/RNB Data Sheet

: Covers the 10Base-T/100Base-TX transceivers with MII/RMII interfaces. KSZ8091MNX/RNB Data Sheet

: Includes details on Energy Efficient Ethernet (EEE) and Wake-on-LAN (WOL) support. KSZ8041NL/RNL Data Sheet

: Details the single-port 10/100 Ethernet PHY with support for multiple interfaces. Microchip Technology General Specifications Most chips in this series share these core characteristics: KSZ8081MNX/RNB Data Sheet - Microchip Technology Section B — Electrical characteristics & power (20

The KSZ80_0B_S4LV0.2 is a specific LED/LCD TV Scaler PCB Board (or Panel Scaler Board) used in television displays. Key Specifications & Identification Part Type: Scaler Board / Panel Scaler PCB.

PCB Number: KSZ80_0B_S4LV0.2 (sometimes written with underscores or hyphens as KSZ80-0B-S4LV0.2).

Application: It is a critical component for processing video signals for the LED/LCD panel. Technical and Installation Notes

Professional Handling Required: This board typically requires professional installation using an LED Panel bonding machine (specifically for COF punching). It is not considered a user-replaceable part without specialized industrial equipment.

Originality: When sourcing this part, ensure it is a 100% original match to the PCB number to maintain the TV's original display quality.

Suppliers: This part is often stocked by specialized electronics suppliers like Great Bharat Electronics, who test these units under real TV simulation conditions. Buy Original LED TV Scaler PCB Board KSZ80-0B-S4LV0.2

✅ Type of Part. LED/LCD Scaler Board (Panel Scaler PCB) Number KSZ80_0B_S4LV0.2. 🔒 Assurance of Originality. This product is 100% Great Bharat Electronics Buy Original LED TV Scaler PCB Board KSZ80-0B-S4LV0.2

✅ Type of Part. LED/LCD Scaler Board (Panel Scaler PCB) Number KSZ80_0B_S4LV0.2. 🔒 Assurance of Originality. This product is 100% Great Bharat Electronics

Most Likely Conclusion: OEM-Customized KSZ8081

After cross-referencing thousands of forum posts and engineering notes, the search "ksz80 ob s4lv02" almost universally points to a custom-marked Microchip KSZ8081RNB PHY, used on specific industrial Ethernet boards, particularly from European or Asian automation suppliers.

Typical electrical characteristics (example values)

Note: sample placeholder numbers for design planning only — obtain official datasheet before final design.

• VCC: 3.0–3.6 V (typical 3.3 V)
• IO voltage tolerance: 3.3 V tolerant
• Operating current: 50–200 mA depending on mode
• Standby current: <10 mA
• IO drive: ±8 mA typical
• Input thresholds: VIH = 0.7×VCC, VIL = 0.3×VCC
• Temp range: –40°C to +85°C

PCB layout and thermal recommendations

• Place bypass capacitors as close as possible to supply pins.
• Use multiple vias on exposed thermal pad; follow vendor’s recommended land pattern.
• Route high-speed differential pairs with controlled impedance and matched lengths.

What You Might Actually Be Looking For: Possible Corrections & Alternatives

Let’s break down the string to help you or other engineers locate the real datasheet.

Why the KSZ8081?

• Popularity: Used in countless IoT gateways, industrial PLCs, and Raspberry Pi compute modules (CM4 uses a KSZ9031, but earlier versions used KSZ8081).
• Pin Count: The KSZ8081 comes in a 24-pin QFN or 32-pin QFN. "OB" may relate to a specific strapping configuration for the LED outputs or PHY address.
• Voltage: The KSZ8081 supports 3.3V for I/O and can have a 1.2V internal core. "LV" in "S4LV02" could indicate a Low Voltage 1.8V I/O variant (KSZ8081L).