KSZ8041NL-AM - 10/100 Ethernet PHY, MII/RMII | Microchip
N.º de pieza: KSZ8041NL-AM ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.45 | $2,45 |
| 10 | $2.2 | $22,00 |
| 100 | $1.95 | $195,00 |
| 500 | $1.72 | $860,00 |
| 1.000 | $1.58 | $1.580,00 |
KSZ8041NL-AM Descripción general
An Ethernet PHY is the analog/digital interface IC that sits between a MAC (media access controller) in a processor, MCU, or FPGA and the twisted-pair physical cable. In the network stack hierarchy, the PHY occupies the physical layer (Layer 1) beneath the data link layer, performing line coding (4B/5B for 100BASE-TX, Manchester for 10BASE-T), scrambling, equalization, echo cancellation, and clock and data recovery, while also handling auto-negotiation per the IEEE 802.3 standard.
Key features of the KSZ8041NL-AM include its single 3.3 V supply operation, which simplifies power tree design in cost-sensitive systems, and its unique mixed-signal design that extends signaling distance while reducing power consumption. The part supports both the parallel MII (16-pin media independent interface) and the reduced pin-count RMII interface, giving designers flexibility when mating to MCUs and embedded processors. HP Auto MDI/MDI-X eliminates crossover cable concerns by automatically selecting transmit/receive pair polarity.
Architecturally, the KSZ8041 integrates the 100BASE-TX transmit shaping filter and receive adaptive equalizer and baseline wander correction, minimizing external component count. It requires only standard Ethernet magnetics (a transformer module) plus a 25 MHz crystal reference; note that in RMII mode the KSZ8041NL requires an external 50 MHz clock source per the family hardware design checklist.
Typical applications include industrial automation and PLC networking, embedded systems and single-board computers, IP security cameras and networked sensors, set-top boxes and printers, and any MCU/FPGA design requiring a 10/100 Mbps wired Ethernet port.
Design consideration: when operating in Auto MDIX mode, Microchip's KSZ8041NL hardware design checklist requires an Auto MDIX-style magnetics module (symmetrical TX/RX channels), and the exposed pad of the QFN must be well-grounded for thermal and EMI performance.
This page adds value beyond the datasheet by synthesizing drop-in family alternatives, FAQ coverage of selection and replacement questions, and practical design notes drawn from the manufacturer's errata and hardware design checklist documents.
Alternativas directas para KSZ8041NL-AM — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con KSZ8041NL-AM (mismo factor de forma y huella) — difiere en Package, RoHS Status, Supply Voltage.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
KSZ8041NL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
KSZ8041NLX
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
KSZ8041RNL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
KSZ8041NL-AM-TR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
KSZ8041TL
✅ Sustitución directa✓ En stock
Consulte el precio
Ver hoja de datos →KSZ8041NL-AM Especificaciones
| Función | 10BASE-T/100BASE-TX Ethernet PHY transceiver |
| Interfaz | MII / RMII |
| Number of Ports | 1 (1/1 Transceiver, Full) |
| Velocidad de datos | 10 Mbps / 100 Mbps |
| Tensión de alimentación | 3.3 V (single supply) |
| Auto MDI/MDI-X | Yes (HP Auto MDI/MDI-X) |
| Auto-Negotiation | Yes |
| Encapsulado | 32-QFN (5x5 mm) with exposed pad |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40C to +85C |
| Crystal Reference | 25 MHz |
| RMII Clock (50 MHz) | External clock source required (per KSZ8041NL design) |
| Signaling Distance | Extended (mixed-signal design, per datasheet) |
| Estado RoHS | Compliant |
| Datasheet Document | KSZ8041NL/RNL Data Sheet (Microchip DS00002245B) |
Guía de configuración de pines de KSZ8041NL-AM 32-qfn (5x5 mm) with exposed pad
Configuración de pines para KSZ8041NL-AM (encapsulado 32-qfn (5x5 mm) with exposed pad). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para KSZ8041NL-AM.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
KSZ8041NL-AM es adecuado para 6 aplicacións: Industrial Automation and PLC Networking, Embedded Systems and Single-Board Computers, IP Security Cameras and Surveillance, Set-Top Boxes and Consumer Connected Devices, FPGA-Based Networking and Test Equipment, Smart Meters and Utility IoT Gateways.
Industrial Automation and PLC Networking
Factory automation nodes, PLC communication modules, and remote I/O blocks rely on the KSZ8041NL-AM for a hardened 10/100 Ethernet port. Its industrial temperature operation and mixed-signal architecture that extends signaling distance make it dependable on long or noisy factory cabling, while the single 3.3 V supply simplifies the power tree in 24 V industrial control cabinets. In MII mode it connects cleanly to MCU EMAC peripherals; in RMII mode it conserves pin count on dense I/O boards. The exposed-pad QFN aids heat spreading inside sealed enclosures, and Auto MDI/MDI-X removes cabling polarity concerns during field installation and maintenance.
Recomendado
Embedded Systems and Single-Board Computers
Embedded Linux single-board computers and MCU-based gateways use the KSZ8041NL-AM as a low-cost 10/100 PHY between the processor MAC and an RJ45 magnetics jack. The RMII interface minimizes pin count to I/O-constrained SoCs and FPGAs, and the clause-22 MDIO management bus allows runtime link status, speed, and power configuration from Linux or bare-metal drivers. Because the KSZ8041 family has broad mainline and RTOS driver support, integration effort is low. Designers should supply a clean 50 MHz RMII clock source and follow Microchip's hardware design checklist for magnetics selection and crystal layout to pass EMI testing.
Recomendado
IP Security Cameras and Surveillance
Network cameras, video encoders, and NVR ports deploy the KSZ8041NL-AM where a proven 100 Mbps link is sufficient for compressed video streams. The low-power mixed-signal PHY keeps heat down in sealed camera housings, and HP Auto MDI/MDI-X removes installation errors when connecting to switches with unknown port polarity. Its single 3.3 V rail integrates easily with camera SoC power domains, and the 32-QFN 5x5 mm footprint fits compact camera module PCBs. Extended signaling distance benefits long cable runs in building surveillance infrastructure where cable quality varies.
Recomendado
Set-Top Boxes and Consumer Connected Devices
Set-top boxes, IP phones, and printers embed the KSZ8041NL-AM for a cost-optimized 10/100 Ethernet port. The single-supply 3.3 V design and minimal external component count (Ethernet magnetics plus a 25 MHz crystal) reduce BOM cost, while the MII interface mates with widely available consumer SoC MACs. Low power consumption supports always-on connected devices and reduces thermal constraints in enclosed plastic housings. The RoHS-compliant 32-QFN package supports standard lead-free SMT assembly lines. For cost-sensitive consumer designs, the KSZ8041NL base ordering code offers the same silicon with alternate supply-form options.
Recomendado
FPGA-Based Networking and Test Equipment
FPGA prototyping boards, protocol analyzers, and industrial test instruments use the KSZ8041NL-AM behind soft or hard Ethernet MACs. The MII/RMII interfaces are simple to implement in FPGA fabric, and the clause-22 MDIO bus allows the test application to read detailed PHY status registers, cable diagnostics, and link configuration. The industrial temperature rating and robust mixed-signal receiver handle laboratory and field cabling variation. Designers should route the 50 MHz RMII clock with care for jitter performance and reference Microchip's errata document to avoid known silicon-mode pitfalls in register-heavy FPGA applications.
Recomendado
Smart Meters and Utility IoT Gateways
Smart electricity meters, data concentrators, and utility gateways require a dependable wired uplink, and the KSZ8041NL-AM fits with its single 3.3 V supply, low power consumption, and industrial temperature range. Extended signaling distance supports metering installations where cabling quality and length vary, and Auto MDI/MDI-X simplifies field wiring by installers. The small 32-QFN footprint fits conformally coated meter PCBs, and MII connectivity pairs with metering MCU EMAC blocks. Long product availability matters in utility deployments with 15+ year lifecycles, making the active KSZ8041NL family a low-risk choice alongside its pin-compatible RNL sibling.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para KSZ8041NL-AM — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | KSZ8041NL | KSZ8041NLX | KSZ8041RNL | KSZ8041NL-AM-TR |
|---|---|---|---|---|---|
| Package | 32-QFN (5x5 mm) | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Interfaces | MII / RMII | MII / RMII | MII / RMII | MII / RMII | MII / RMII |
| RMII 50 MHz Clock | External clock required | External clock required | External clock required | Internal 50 MHz output from 25 MHz crystal | External clock required |
| Data Rate | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| Supply Voltage | 3.3 V single supply | 3.3 V single supply | 3.3 V single supply | 3.3 V single supply | 3.3 V single supply |
| Lifecycle Status | Active | Active | Active | Active | Obsolete (per DigiKey, 2026-10-16) |
| Auto MDI/MDI-X | Yes (HP Auto MDI/MDI-X) | Yes | Yes | Yes | Yes |
Diferenciadores clave
- MII + RMII dual host interface (frente a KSZ8081MNXIA)
- Single 3.3 V supply (frente a DP83848C)
- Pin-compatible family with integrated clock option (frente a KSZ8041RNL)
- Trade-off: mature-generation silicon (frente a KSZ8061RNB)
Notas de diseño
Follow the Microchip KSZ8041NL Hardware Design Checklist (document 00002498B) during layout. It specifies, among other requirements, that RJ45 pin 6 (RX-) must trace through the magnetics to RX- (pin 4) of the KSZ8041NL, and that Auto MDIX operation requires Auto MDIX-style magnetics where the TX and RX channels are symmetrical. Solder the QFN exposed pad to a solid ground pour with an array of thermal vias; this is essential for both heat dissipation and low-impedance return paths for the transmit line drivers.
In RMII mode the KSZ8041NL requires an external 50 MHz reference clock; its jitter directly affects transmit eye compliance. Use a low-jitter crystal oscillator placed close to the PHY clock pin, route the 50 MHz trace over an unbroken ground plane, and avoid running it adjacent to magnetics or switching-regulator nodes. The 25 MHz crystal for the PHY PLL should have appropriate load capacitors per the crystal vendor specification and short symmetric traces. Poor RMII clock quality is the most common cause of 100BASE-TX compliance-test failures on KSZ8041-based boards.
Review the Microchip 'KSZ8041 Silicon Errata and Data Sheet Clarification' (80000700A) before production release - it documents known silicon issues and required workarounds for the KSZ8041 family. Also note that cross-brand 10/100 PHYs such as the DP83848C (48-HTQFP) or DM9162 are NOT drop-in: they differ in pinout, register map, and MII timing, so swapping requires board redesign and driver changes. Confirm the magnetics module is Auto MDIX-symmetric, and verify the -TR ordering code status before committing a BOM, as KSZ8041NL-AM-TR is marked obsolete.
Estimated: with a single 3.3 V supply and typical 100BASE-TX active operation, expect the KSZ8041NL to draw in the low hundreds of milliwatts; size the 3.3 V rail budget accordingly and decouple each supply pin with 100 nF ceramics plus at least one bulk capacitor (4.7 uF to 10 uF) near the device. Do not share PHY analog supply decoupling with noisy digital loads. The datasheet provides precise per-mode current figures - use those values (not this estimate) for final power budget calculations.
Información de cumplimiento
RoHS-compliant per Microchip standard product policy for the KSZ8041 family. REACH, halogen-free, and conflict-minerals status not stated in provided data; verify on the Microchip product page or environmental datasheet.
