KSZ8041NL-TR - 10/100 Ethernet PHY, MII/RMII, 32-QFN | Microchip
部品番号: KSZ8041NL-TR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.1 | $31.00 |
| 100 | $2.65 | $265.00 |
| 500 | $2.25 | $1,125.00 |
| 1,000 | $1.95 | $1,950.00 |
KSZ8041NL-TR 概要
A PHY (physical layer device) is the lowest tier of the Ethernet OSI stack, sitting just above the transformer/MDI and below the MAC layer. It handles line coding (MLT-3 / 4B5B), link training, auto-negotiation, and clock recovery. Within a typical embedded Ethernet design, a PHY sits between the magnetics plus RJ45 jack and an Ethernet MAC, either inside a microcontroller or as a separate controller; engineers select a discrete PHY when the host MCU/MAC lacks 10/100 support, when isolation or industrial temperature range is required, or when a broader MAC/PHY ecosystem has been validated for a given application.
Key features of the KSZ8041NL-TR include 1/1 transceiver configuration with full MII and RMII MAC-side interfaces (SMII supported on the KSZ8041RNL version), HP Auto-MDIX crossover correction that eliminates the need for crossover cables, on-chip 1.8V regulator that can optionally power the MAC, low-power energy-detect mode, and linkMD cable diagnostics for opens, shorts, and cable length estimation. The mixed-signal design reportedly reduces power consumption versus competing 100 Mbps PHYs.
Architecturally, the KSZ8041NL uses a DSP-based echo canceller and adaptive equalizer to achieve robust 100BASE-TX performance over CAT-5 cable, with HP Auto-MDIX implemented in the analog front end to autonegotiate polarity and pair roles. The MAC interface supports both MII (25 MHz reference clock at 100 Mbps) and RMII (50 MHz reference clock shared between MAC and PHY), enabling pin-compatible use with a wide range of microcontrollers.
Typical applications include set-top boxes and IPTV gateways, network-capable printers and MFPs, industrial Ethernet sensors and PLCs, gaming consoles, and any embedded design that needs a 10/100 Ethernet port without a built-in PHY. The QFN-32 (5x5 mm) small footprint also suits space-constrained consumer and IoT appliances.
When laying out this part, give the 50 MHz RMII clock trace a short, matched-length path to both the MAC and the PHY, and follow Microchip's KSZ8041NL Hardware Design Checklist for RJ45 magnetics pairing; do not skip the center-tap capacitor network on each line-side pair.
This page compiles distributor pricing, drop-in alternatives, and PCB design notes not found in the bare datasheet, helping engineers select and place the KSZ8041NL-TR quickly.
ドロップイン代替品: KSZ8041NL-TR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
KSZ8041NLJ-TR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
KSZ8041NLI-TR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
KSZ8041NL-TR
✅ ドロップイン✓ 在庫あり
$1.95 / 個
データシートを見る →KSZ8041NL-TR 仕様
| Part Number | KSZ8041NL-TR |
| Manufacturer | Microchip Technology |
| Description | 10BASE-T/100BASE-TX Physical Layer Transceiver |
| データレート | 10/100 Mbps |
| Ethernet Standard | IEEE 802.3, IEEE 802.3u |
| MAC Interface | MII, RMII |
| 電源電圧 | 3.135 V to 3.465 V (single 3.3 V supply) |
| Auto-MDIX | HP Auto-MDIX |
| Transceivers | 1/1 (full) |
| パッケージ | 32-QFN (5x5 mm) MLF |
| ピン数 | 32 |
| Cable Diagnostics | LinkMD cable diagnostic |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
KSZ8041NL-TR ピン構成
| ピン 1 | TXRXP-A — Differential transmit/receive pair A |
| ピン 2 | TXMXP-A — Differential transmit/receive pair A |
| ピン 3 | VOUT_1.8V — Internal 1.8V LDO output |
| ピン 4 | VDDIO — MAC-side IO supply |
| ピン 5 | RXD0/MODE0 — MII RXD0 / RMII strap |
| ピン 6 | RXD1/MODE1 — MII RXD1 / RMII strap |
| ピン 7 | RXER/PHYAD0 — MII RX error / PHY address strap |
| ピン 8 | RXCLK/REFCLK — MII RX clock or 50MHz RMII reference |
| ピン 9 | RXDV/CRS_DV — RX data valid / carrier sense |
| ピン 10 | MDC — Management data clock |
| ピン 11 | MDIO — Management data IO |
| ピン 12 | GND — Ground |
| ピン 13 | VDD — 3.3V main supply |
| ピン 14 | RXMXP-B — Differential receive pair B |
| ピン 15 | RXRXP-B — Differential receive pair B |
| ピン 16 | TXMXP-B — Differential transmit pair B |
| ピン 17 | TXRXP-B — Differential transmit pair B |
| ピン 18 | NC — Not connected |
| ピン 19 | TXD0 — MII TX data 0 / RMII data bit |
| ピン 20 | TXD1 — MII TX data 1 / RMII data bit |
| ピン 21 | TXEN — MII TX enable / RMII TX enable |
| ピン 22 | TXER — MII TX error / not used in RMII |
| ピン 23 | TXCLK — MII TX clock output |
| ピン 24 | COL — MII collision detect / not used in RMII |
| ピン 25 | CRS — MII carrier sense / not used in RMII |
| ピン 26 | RST_N — Hardware reset, active low |
| ピン 27 | INTR_N — Interrupt output, active low |
| ピン 28 | LED0/PME_N — Activity LED / power management event |
| ピン 29 | LED1 — Link status LED |
| ピン 30 | XI — 25MHz crystal input |
| ピン 31 | XO — 25MHz crystal output |
| ピン 32 | NC — Not connected |
主な用途
KSZ8041NL-TR の用途: 6 件s: Network-Ready Printers and MFPs, Set-Top Boxes and IPTV Gateways, Industrial Ethernet Sensors and PLCs, Gaming Consoles and Consumer Embedded Devices, Embedded Linux Boards and SOMs, Network Test Equipment and Protocol Analyzers.
Network-Ready Printers and MFPs
The KSZ8041NL-TR brings reliable 10/100 Ethernet to office printers and multifunction peripherals that need a stable SMB or LPR connection. The mixed-signal DSP extends signaling over up to 100 m of CAT-5 cable inside wall cavities, and HP Auto-MDIX eliminates the cost of a crossover cable for IT installers. With LinkMD cable diagnostics, the device can report open/short cable faults to the host MCU for remote field service, reducing truck rolls. Pair the KSZ8041NL-TR with an embedded ARM Cortex-M4 host running a TCP/IP stack to bring the printer online without an external PHY MAC. The single 3.3V supply with internal 1.8V regulator simplifies the BOM compared to dual-rail PHYs, saving PCB area in space-constrained MFP control boards.
おすすめ
Set-Top Boxes and IPTV Gateways
Set-top boxes and IPTV gateways require a low-cost, low-power Ethernet port for IP multicast video, OTA updates, and operator telemetry. The KSZ8041NL-TR supports the full 100 Mbps payload required for SD/HD IPTV streams and offers an energy-detect power-down mode that drops consumption during standby when the link is idle. Its MII/RMII interface connects directly to SoCs that lack an integrated Ethernet MAC, such as many cost-optimized media processors used in IPTV boxes. HP Auto-MDIX saves the OEM from including instructions in the box for crossover wiring, simplifying user setup. The 32-QFN 5x5 footprint fits comfortably next to HDMI/Ethernet connectors on typical STB mainboards with limited PCB real estate.
おすすめ
Industrial Ethernet Sensors and PLCs
Industrial sensors, PLCs and remote I/O modules use the KSZ8041NL-TR for robust 10/100 connectivity to plant networks. The PHY's adaptive equalizer and baseline-wander correction maintain performance on aged cable runs typical of factory floors, and HP Auto-MDIX allows loopback testing without re-cabling. Its transformerless line-driver interface connects to standard Pulse or Bel magnetics plus an RJ45 jack, supporting industrial isolation voltages up to 1.5 kV. With LinkMD cable diagnostics, the device reports copper faults to the host for predictive maintenance, complementing SCADA visibility. Pair with an industrial-grade MCU (e.g. a SAM E70) and an RTOS for deterministic Ethernet/IP, PROFINET or Modbus TCP comms on the factory floor.
おすすめ
Gaming Consoles and Consumer Embedded Devices
Gaming consoles, smart appliances and connected consumer electronics often include an Ethernet port for online play or firmware updates. The KSZ8041NL-TR offers the right blend of small 32-QFN footprint, low BOM cost, and HP Auto-MDIX to ease retail UX. The single 3.3V rail and internal 1.8V regulator minimize external components, allowing the entire PHY plus magnetics to fit under an RJ45 jack footprint. RMII support with a 50 MHz reference clock lets designers mate the PHY with low-cost Cortex-M MCUs without consuming extra pins compared to MII. Power consumption is reduced versus competing PHYs thanks to the mixed-signal DSP, helping meet Energy Star standby requirements for connected consumer devices.
おすすめ
Embedded Linux Boards and SOMs
Hobbyist and industrial embedded Linux boards (SOMs, single-board computers, and dev kits) often use the KSZ8041NL-TR as a low-cost second port alongside integrated MACs, or as the primary 10/100 port when SoCs lack Ethernet. The PHY exposes the standard MDIO/MDC management interface, allowing Linux drivers and device-tree bindings to configure the link and read status via ethtool. RMII mode lets the BOM use a single 50 MHz CMOS clock source shared with the SoC, simplifying the clocking tree on low-cost boards. The 32-QFN part is hand-solderable with care, supporting rapid prototyping in maker and education markets, and Microchip provides Linux mainline kernel drivers for the device.
おすすめ
Network Test Equipment and Protocol Analyzers
Portable network test equipment, copper-cable certifiers and protocol analyzers depend on a known-good PHY reference for their loopback and traffic generation features. The KSZ8041NL-TR's deterministic MII/RMII bus and microchip LinkMD cable diagnostics make it a useful adjunct PHY in these designs. Engineers often use the device in a forced 100BASE-TX full-duplex mode for traffic replay and BER testing, and rely on its robust adaptive equalizer to characterize cable margin. The 32-QFN 5x5 footprint fits into handheld tester form factors where board area is at a premium. HP Auto-MDIX also simplifies field-test fixtures that wire symmetric cable pairs to the analyzer.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: KSZ8041NL-TR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | KSZ8041NLJ-TR | KSZ8041NLI-TR | KSZ8041TL |
|---|---|---|---|---|
| Package | 32-QFN (5x5 mm) | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same | TQFP-48 (different) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Data Rate | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| MAC Interface | MII, RMII | MII, RMII | MII, RMII | MII, RMII |
| Supply Voltage | 3.135 V to 3.465 V | 3.135 V to 3.465 V | 3.135 V to 3.465 V | 3.135 V to 3.465 V |
| Auto-MDIX | Yes (HP) | Yes (HP) | Yes (HP) | Yes (HP) |
| Cable Diagnostics | LinkMD | LinkMD | LinkMD | LinkMD |
| Packaging | Tape & Reel (1k reel) | Tape & Reel | Tape & Reel | Tray/Tape |
主な差別化要因
- Same 32-QFN footprint as KSZ8041NLJ-TR but commercial temperature grade （vs KSZ8041NLI-TR)
- Identical silicon to KSZ8041TL but in 32-QFN package （vs KSZ8041TL)
- MII/RMII support with no requirement for high-frequency clock on the MAC side （vs KSZ8081MNXCA-TR)
設計ノート
Place the KSZ8041NL-TR as close as possible to the RJ45 jack and magnetics; the differential TX/RX pairs should be kept to a maximum of one decoupling pass and routed as 100-ohm differential pairs on the top layer over a solid ground plane. The Microchip KSZ8041NL Hardware Design Checklist (00002498B) specifies that pin 4 of the device must connect through the magnetics to RX- of the RJ45 (pin 6), and Auto-MDIX style magnetics (with symmetrical TX/RX channels) are required for Auto-MDIX mode.
Estimated: at 100 Mbps full-duplex with all four pairs active, the device dissipates up to 250 mW from the 3.3V rail. The 32-QFN EP (exposed pad) is pin 33 and MUST be soldered to a 4-layer thermal pad (at least 6 thermal vias recommended) for reliable operation. Decoupling must include a 10uF bulk plus 0.1uF high-frequency cap within 3 mm of the 3.3V and VDDIO pins, with a separate 1uF decoupling on the internal 1.8V rail.
When using RMII mode, the 50 MHz reference clock traces must be short, length-matched with the MAC side, and routed over continuous ground. According to the application notes, a 25 MHz crystal must connect between XI and XO with its load capacitors placed within 5 mm; the tolerance should be +/- 50 ppm for IEEE 802.3u compliance. RJ45 center-tap capacitors (typically 0.1uF to 0.5uF high-voltage) must be placed close to each magnetics center tap, and the unused pairs in 100BASE-TX mode must be terminated per the Magnetics vendor guidance.
コンプライアンス情報
RoHS and lead-free per Microchip compliance documentation. Not AEC-Q100 qualified - choose an automotive-qualified variant for vehicle applications. MSL rating per the manufacturer product page; not specified in the verified web data and noted as [DATA_NEEDED].
