KSZ8081MNX Transceiver: Pinout, Equivalent and Datasheet
3.3V 32 Pin KSZ8081 Receivers 1/1 Drivers/Receivers Min 1.71V V Max 3.465V V









3.3V 32 Pin KSZ8081 Receivers 1/1 Drivers/Receivers Min 1.71V V Max 3.465V V
The KSZ8081MNX is a single 3.3V supply device with a built-in regulator to supply the 1.2V core. The KSZ8081MNX design incorporates voltage-mode transmit drivers and on-chip terminations. The KSZ8081MNX offers the Media Independent Interface (MII) for direct connection with MII-compliant Ethernet MAC processors and switches. Furthermore, Huge range of Semiconductors, Capacitors, Resistors and IcS in stock. Welcome RFQ.

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- KSZ8081MNX Pinout
- KSZ8081MNX CAD Model
- KSZ8081MNX Overview
- KSZ8081MNX Features
- Specifications
- KSZ8081MNX Functional Block Diagram
- KSZ8081MNX Recommended Reset Circuit
- KSZ8081MNX Equivalent
- Parts with Similar Specs
- KSZ8081MNX Applications
- KSZ8081MNX Package
- KSZ8081MNX Recommended Land Pattern
- KSZ8081MNX Manufacturer
- Datasheet PDF
KSZ8081MNX Pinout
The following figure is the diagram of KSZ8081MNX pinout.

Pinout
KSZ8081MNX CAD Model
The followings are KSZ8081MNX Symbol, Footprint, and 3D Model.

PCB Symbol

PCB Footprint

3D Model
KSZ8081MNX Overview
The KSZ8081MNX offers the Media Independent Interface (MII) for direct connection with MII-compliant Ethernet MAC processors and switches. The KSZ8081 is a single-supply 10BASE-T/100BASE-TX Ethernet physical-layer transceiver for transmission and reception of data over standard CAT-5 unshielded twisted pair (UTP) cable. The KSZ8081 is a highly-integrated PHY solution. It reduces board cost and simplifies board layout by using on-chip termination resistors for the differential pairs and by integrating a low-noise regulator to supply the 1.2V core. The KSZ8081 provides diagnostic features to facilitate system bring-up and debugging in production testing and in product deployment. Parametric NAND tree support enables fault detection between KSZ8081 I/Os and the board. LinkMD® TDR-based cable diagnostics identify faulty copper cabling. The KSZ8081MNX and KSZ8081RNB are available in 32-pin, lead-free QFN packages.
This article provides you with a basic overview of the KSZ8081MNX Transceiver, including its pin descriptions, features and specifications, etc., to help you quickly understand what KSZ8081MNX is.
KSZ8081MNX Features
● Single-chip 10Base-T/100Base-TX IEEE 802.3 compliant Ethernet transceiver
● MII interface support
● Back-to-back mode support for a 100 Mbps copper repeater
● MDC/MDIO management interface for PHY register configuration
● Programmable interrupt output
● LED outputs for link, activity, and speed status indication
● On-chip termination resistors for the differential pairs
● Baseline wander correction
● HP Auto MDI/MDI-X to reliably detect and correct straight-through and crossover cable connections with disable and enable option
● Auto-negotiation to automatically select the highest link-up speed (100 Mbps) and duplex (half/full)
● Power-down and power-saving modes
● LinkMD TDR-based cable diagnostics to identify faulty copper cabling
● Parametric NAND Tree support for fault detection between chip I/Os and the board
● HBM ESD rating (6 kV)
● Loopback modes for diagnostics
● Single 3.3V power supply with VDD I/O options for 1.8V, 2.5V, or 3.3V
● Built-in 1.2V regulator for core
● Available in 32-pin (5 mm × 5 mm) QFN package
Specifications
- TypeParameter
- Factory Lead Time8 Weeks
- Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Surface Mount - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
32-VFQFN Exposed Pad - Number of Pins32
- Supplier Device Package
The parameter "Supplier Device Package" in electronic components refers to the physical packaging or housing of the component as provided by the supplier. It specifies the form factor, dimensions, and layout of the component, which are crucial for compatibility and integration into electronic circuits and systems. The supplier device package information typically includes details such as the package type (e.g., DIP, SOP, QFN), number of pins, pitch, and overall size, allowing engineers and designers to select the appropriate component for their specific application requirements. Understanding the supplier device package is essential for proper component selection, placement, and soldering during the manufacturing process to ensure optimal performance and reliability of the electronic system.
32-QFN (5x5) - Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~85°C - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Cut Tape (CT) - Published2015
- Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
2 (1 Year) - TypeTransceiver
- Max Operating Temperature
The Maximum Operating Temperature is the maximum body temperature at which the thermistor is designed to operate for extended periods of time with acceptable stability of its electrical characteristics.
85°C - Min Operating Temperature
The "Min Operating Temperature" parameter in electronic components refers to the lowest temperature at which the component is designed to operate effectively and reliably. This parameter is crucial for ensuring the proper functioning and longevity of the component, as operating below this temperature may lead to performance issues or even damage. Manufacturers specify the minimum operating temperature to provide guidance to users on the environmental conditions in which the component can safely operate. It is important to adhere to this parameter to prevent malfunctions and ensure the overall reliability of the electronic system.
-40°C - Voltage - Supply
Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.
1.8V 2.5V 3.3V - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
KSZ8081 - Operating Supply Voltage
The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.
3.3V - Number of Channels1
- Interface
In electronic components, the term "Interface" refers to the point at which two different systems, devices, or components connect and interact with each other. It can involve physical connections such as ports, connectors, or cables, as well as communication protocols and standards that facilitate the exchange of data or signals between the connected entities. The interface serves as a bridge that enables seamless communication and interoperability between different parts of a system or between different systems altogether. Designing a reliable and efficient interface is crucial in ensuring proper functionality and performance of electronic components and systems.
Ethernet - Max Supply Voltage
In general, the absolute maximum common-mode voltage is VEE-0.3V and VCC+0.3V, but for products without a protection element at the VCC side, voltages up to the absolute maximum rated supply voltage (i.e. VEE+36V) can be supplied, regardless of supply voltage.
3.465V - Min Supply Voltage
The minimum supply voltage (V min ) is explored for sequential logic circuits by statistically simulating the impact of within-die process variations and gate-dielectric soft breakdown on data retention and hold time.
1.71V - Max Supply Current
Max Supply Current refers to the maximum amount of electrical current that a component can draw from its power supply under normal operating conditions. It is a critical parameter that ensures the component operates reliably without exceeding its thermal limits or damaging internal circuitry. Exceeding this current can lead to overheating, performance degradation, or failure of the component. Understanding this parameter is essential for designing circuits that provide adequate power while avoiding overload situations.
47mA - Data Rate
Data Rate is defined as the amount of data transmitted during a specified time period over a network. It is the speed at which data is transferred from one device to another or between a peripheral device and the computer. It is generally measured in Mega bits per second(Mbps) or Mega bytes per second(MBps).
100 Mbps - Protocol
In electronic components, the parameter "Protocol" refers to a set of rules and standards that govern the communication between devices. It defines the format, timing, sequencing, and error checking methods for data exchange between different components or systems. Protocols ensure that devices can understand and interpret data correctly, enabling them to communicate effectively with each other. Common examples of protocols in electronics include USB, Ethernet, SPI, I2C, and Bluetooth, each with its own specifications for data transmission. Understanding and adhering to protocols is essential for ensuring compatibility and reliable communication between electronic devices.
MII - Number of Drivers/Receivers1/1
- Duplex
In the context of electronic components, "Duplex" refers to a type of communication system that allows for bidirectional data flow. It enables two devices to communicate with each other simultaneously, allowing for both sending and receiving of data at the same time. Duplex communication can be further categorized into two types: half-duplex, where data can be transmitted in both directions but not at the same time, and full-duplex, where data can be sent and received simultaneously. This parameter is crucial in networking and telecommunications systems to ensure efficient and effective data transmission between devices.
Full - Number of Transceivers1
- Simplex/Duplex
In electronic components, the parameter "Simplex/Duplex" refers to the type of communication or data transmission mode supported by the component. Simplex communication is a one-way communication mode where data flows only in one direction, from the sender to the receiver. This means that the sender can only transmit data, and the receiver can only receive data. On the other hand, duplex communication is a two-way communication mode where data can flow in both directions, allowing for simultaneous transmission and reception of data between two devices. Understanding whether a component supports simplex or duplex communication is important for determining how data will be exchanged between devices and ensuring compatibility in a given system.
Full Duplex - Max Junction Temperature (Tj)
Max Junction Temperature (Tj) refers to the maximum allowable temperature at the junction of a semiconductor device, such as a transistor or integrated circuit. It is a critical parameter that influences the performance, reliability, and lifespan of the component. Exceeding this temperature can lead to thermal runaway, breakdown, or permanent damage to the device. Proper thermal management is essential to ensure the junction temperature remains within safe operating limits during device operation.
125°C - Ambient Temperature Range High
This varies from person to person, but it is somewhere between 68 and 77 degrees F on average. The temperature setting that is comfortable for an individual may fluctuate with humidity and outside temperature as well. The temperature of an air conditioned room can also be considered ambient temperature.
85°C - Height1mm
- Length5mm
- Width5mm
- RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
KSZ8081MNX Functional Block Diagram
The following is the Block Diagram of KSZ8081MNX.

Functional Block Diagram
KSZ8081MNX Recommended Reset Circuit
The following is the Recommended Reset Circuit of KSZ8081MNX.

Recommended Reset Circuit

Recommended Reset Circuit for Interfacing with CPU/FPGA Reset Output
KSZ8081MNX Equivalent
| Model number | Manufacturer | Description |
| KSZ8051MLLI | Microchip Technology Inc | Ethernet Transceiver, 1-Trnsvr, CMOS, PQFP48, 7 X 7 MM, LEAD FREE, LQFP-48 |
| KSZ8081MLXIA-TR | Microchip Technology Inc | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| KSZ8051MNLUB-VAO | Microchip Technology Inc | Ethernet Transceiver |
| KSZ8051MLL | Microchip Technology Inc | Ethernet Transceiver, 1-Trnsvr, CMOS, PQFP48, 7 X 7 MM, LEAD FREE, LQFP-48 |
| KSZ8081MLXCA | Microchip Technology Inc | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| KSZ8061MNXI | Microchip Technology Inc | DATACOM, MANCHESTER ENCODER |
| KSZ8051MNLI | Microchip Technology Inc | Ethernet Transceiver, 1-Trnsvr, CMOS, 5 X 5 MM, LEAD FREE, QFN-32 |
| KSZ8081MNXCA | Microchip Technology Inc | DATACOM, ETHERNET TRANSCEIVER, QCC32 |
| KSZ8081MNXCC | Microchip Technology Inc | DATACOM, ETHERNET TRANSCEIVER, QCC32 |
| KSZ8081MLXIC | Microchip Technology Inc | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsData RateNumber of TransceiversMin Supply VoltageMax Supply VoltageNumber of Drivers/ReceiversTypeView Compare
KSZ8081MNXIA-TR
32-VFQFN Exposed Pad
32
100 Mbps
1
1.71 V
3.465 V
1/1
Transceiver
32-VFQFN Exposed Pad, 32-MLF?
32
100 Mbps
1
3.135 V
3.465 V
1/1
Transceiver
32-VFQFN Exposed Pad, 32-MLF?
32
100 Mbps
1
3.135 V
3.465 V
1/1
Transceiver
KSZ8081MNX Applications
● Game console
● IP phone
● IP set-top box
● IP TV
● LOM
● Printer
KSZ8081MNX Package
The following diagram shows the KSZ8081MNX package.

Top View

Side View

Bottom View
KSZ8081MNX Recommended Land Pattern
The following diagram shows the KSZ8081MNX Recommended Land Pattern.

Recommended Land Pattern
KSZ8081MNX Manufacturer
Microchip Technology Inc. is a leading provider of microcontroller and analog semiconductors, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide. Headquartered in Chandler, Arizona, Microchip offers outstanding technical support along with dependable delivery and quality.
Datasheet PDF
- Datasheets :
- PCN Design/Specification :
- PCN Packaging :
- ConflictMineralStatement :
What is the essential property of the KSZ8081?
The KSZ8081 is an integrated single 3.3V supply Fast Ethernet transceiver. It is fully compliant with the IEEE 802.3 Specification, and reduces board cost and simplifies board layout by using on-chip termination resistors for the two differential pairs and by integrating the regulator to supply the 1.2V core.
Does KSZ8081MNX comply with IEEE 802.3 Specification?
The KSZ8081MNX conforms to the auto-negotiation protocol, defined in Clause 28 of the IEEE 802.3 Specification. Auto-negotiation allows unshielded twisted pair (UTP) link partners to select the highest common mode of operation.
What is the voltage of the KSZ8081MNX device?
The KSZ8081MNX is a single 3.3V supply device with a built-in regulator to supply the 1.2V core.
Does the KSZ8081MNX design include a voltage mode transfer driver?
The KSZ8081MNX design incorporates voltage-mode transmit drivers and on-chip terminations.
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