Ksz80 Ob — S4lv02 Datasheet

The string "ksz80 ob s4lv02" appears to be a specific internal or partial part marking for a member of the Microchip KSZ8081 (formerly Micrel) family of 10/100 Ethernet transceivers.

The primary technical reference for this device is the Microchip KSZ8081MNX/RNB Data Sheet . Key Specifications & Features

The KSZ8081 is a highly integrated, single-chip Physical Layer (PHY) transceiver designed for low-power and cost-sensitive applications.

Ethernet Support: Full compliance with IEEE 802.3 10Base-T/100Base-TX standards. Host Interfaces:

MII (Media Independent Interface): Supported by the KSZ8081MNX and MLX variants.

RMII (Reduced Media Independent Interface): Supported by the KSZ8081RNA/RNB/RND variants.

Power Supply: Operates on a single 3.3V supply, featuring an integrated 1.2V LDO regulator for the core.

Diagnostics: Includes LinkMD® TDR-based cable diagnostics to identify faults like open or shorted cables.

I/O Flexibility: Supports digital I/O voltages of 1.8V, 2.5V, or 3.3V. Common Device Variants

Microchip offers several versions of the KSZ8081 based on package size and clocking needs: Microchip Ethernet Transceiver DigiKey& more Go to product viewer dialog for this item.

24-pin QFN; uses a 25MHz crystal to output a 50MHz RMII clock to the MAC. KSZ8081RNB

32-pin QFN; offers a similar RMII interface with dedicated LED outputs. ksz80 ob s4lv02 datasheet

Microchip Technology KSZ8081RNDIA-TR IC TRANSCEIVER FULL 1/1 24QFN Go to product viewer dialog for this item.

24-pin QFN; expects a 50MHz RMII reference clock as an input. Microchip Ethernet Transceiver DigiKey& more Go to product viewer dialog for this item. 32-pin QFN; supports the MII interface. Applications The KSZ8081 family is commonly integrated into: Game consoles and IP set-top boxes. Industrial Ethernet systems and IP phones. LOM (LAN on Motherboard) implementations. KSZ8081MNX/RNB Data Sheet - Microchip Technology

The "KSZ80" series (specifically the KSZ8081MNX/RNB transceivers) features several "interesting" capabilities designed to lower system costs and simplify debugging.

The most notable features often highlighted in the Microchip KSZ8081 datasheets include:

LinkMD® TDR-based Cable Diagnostics: This utilizes Time-Domain Reflectometry (TDR) to identify faulty copper cabling, specifically detecting opens, shorts, and impedance mismatches.

Parametric NAND Tree Support: Provides a simple mechanism for detecting manufacturing faults (like open pins or shorts) between the chip’s I/Os and the PCB.

Integrated LDO Regulator: The chip includes a built-in 1.2V regulator to power its core, allowing the entire device to operate from a single 3.3V supply.

On-Chip Termination: It includes built-in termination resistors for differential pairs, which reduces the need for external components and simplifies board layout.

Flexible I/O Voltage: Supports digital I/O voltages of 1.8V, 2.5V, or 3.3V, allowing it to interface directly with various host controllers without level shifters.

Quiet/Low-Power Modes: Features standard power-down and Energy-Detect Power-Down, which reduces consumption when the link is idle. Summary of Specifications Specification Speed 10Base-T/100Base-TX (10/100 Mbps) Interface MII (MNX version) or RMII v1.2 (RNB version) ESD Protection ±6 kV (HBM) on MDI pins Package 32-pin QFN (5mm x 5mm) Operating Temp

Commercial (0°C to +70°C) or Industrial (-40°C to +85°C) KSZ8081MNX/RNB Data Sheet - Microchip Technology The string "ksz80 ob s4lv02" appears to be

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

Here is the correction of the text:

• "ksz80 ob" $\rightarrow$ KSZ8081 (A very common 10/100 Ethernet Physical Layer Transceiver).
• "s4lv02" $\rightarrow$ Likely "MNX", "MND", or a specific Date/Lot Code. The KSZ8081 part numbers usually follow the format KSZ8081MNX or KSZ8081MND (for different packages or automotive grades). It could also be a typo for the SLLS452 document number (often seen on older Texas Instruments PHY datasheets), but given the "ksz" prefix, the Microchip/Micrel part is the primary match.

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.

What you’d expect in an official datasheet

An official datasheet for KSZ80 OB S4LV02 (or similarly named part) would include:

1. Product description

   • Functional overview, block diagram, supported interfaces (MII/RMII/MDIO/SPI/I2C/SPI), and typical applications (embedded networking, industrial controllers, bridges).

2. Key features

   • Operating voltage range (e.g., 1.8 V, 2.5 V, 3.3 V).
   • Supported data rates (e.g., 10/100/1000 Mbps for PHYs).
   • Power consumption (active/idle/suspend modes).
   • Package types (QFN, TSSOP, SOIC) and pin count.
   • Temperature range (industrial: –40°C to +85°C).

3. Functional block diagram

   • Internal modules (transceivers, MAC interfaces, buffer memory, MDIO/SPI registers).

4. Pinout and pin descriptions

   • Pin assignments, I/O types (push-pull, open-drain), and recommended PCB land pattern.

5. Absolute maximum ratings

   • Supply voltage limits, input voltage ranges, storage temperature.

6. Recommended operating conditions

   • Supply rails, clock frequencies, timing references.

7. Electrical characteristics

   • Input/output voltage thresholds, VIH/VIL, IOH/IOL, leakage currents, power-on reset thresholds.

8. Timing diagrams

   • Interface timing (MDIO/MDC, SPI timing, reset sequences).

9. Register map / Configuration

   • Control/status registers, initialization sequences, PHY auto-negotiation parameters.

10. Application circuits and reference designs

• Typical connections to MCU, magnetics (for Ethernet), pull-up/pull-down resistor values, decoupling caps, power sequencing.

11. Thermal and mechanical

• Thermal resistance (θJA), recommended PCB thermal pads, mechanical drawing with dimensions.

12. Reliability and compliance

• ESD protection levels (HBM, MM), RoHS compliance, regulatory notes for Ethernet PHYs (FCC/CE) if applicable.

1. The "KSZ80" Prefix – A Strong Clue

The prefix KSZ 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.

• KSZ80xx Family: Microchip produces the KSZ8041, KSZ8081, KSZ8091, and KSZ8721 series. These are 10/100Base-T/TX/FX PHY transceivers.
• What is "KSZ80"? This is likely a truncated reference to the KSZ80xx family. For example, the KSZ8081 is a very common 10/100Base-T PHY with MII/RMII interfaces.

Hypothesis 1: The base component is Microchip’s KSZ8081 or KSZ8041.

Likely Interpretation

The string ksz80 ob s4lv02 appears to be either:

1. A mis-typed or partially corrupted part number – Many ICs have a top marking that is an abbreviated or date/lot-code specific version of the full part number.
2. Two separate designators – For example:
   • KSZ80 might refer to a Microchip (formerly Micrel) KSZ80xx series Ethernet transceiver or switch (e.g., KSZ8081, KSZ8041).
   • S4LV02 looks similar to a serial EEPROM or SRAM part number pattern:
     • S4 / S-4 → Seiko Instruments or ABLIC S-24C series?
     • LV02 → Low-voltage, 2Kbit (common for 24LC02-type I²C EEPROM).
     • But “S4LV02” alone is not a standard prefix.

1. Overview

The KSZ8081 is a single-port, 10Base-T/100Base-TX Physical Layer Transceiver (PHY). It is widely used in embedded systems to provide Ethernet connectivity via an MII (Media Independent Interface) or RMII (Reduced MII) connection to a microcontroller or processor.

Manufactured by Microchip Technology (acquired from Micrel), this chip is favored for its low power consumption, small footprint, and integrated termination resistors, which reduce the overall Bill of Materials (BOM) cost.

3. Practical steps you can take

If you physically have the chip:

• Look for logos — Micrel/Microchip (stylized “M”), Sony, Samsung, ISSI.
• Count pins and measure Vcc — S4LV02 suggests 1.8V–3.3V SRAM.
• Check adjacent components — Ethernet magnetics? Crystal? Then it’s likely a PHY.

If it’s a marking code (shortened for space on small packages):

• Search “S4LV02” alone in Google or Octopart — often yields Sony CXK4S4LV02-xx.
• Search “KSZ80” in Microchip’s site — might redirect to KSZ8721 or KSZ8081.

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