KSZ8001LTR - 10/100BASE-TX/FX PHY Transceiver, 48-LQFP | Microchip
部品番号: KSZ8001LTR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.45 | $34.50 |
| 100 | $2.99 | $299.00 |
| 500 | $2.62 | $1,310.00 |
| 1,000 | $2.34 | $2,340.00 |
KSZ8001LTR 概要
A Physical Layer Transceiver (PHY) is a layer-1 device in the OSI networking model that converts digital MAC-side data into analog line signals over copper (BASE-TX) or fiber (BASE-FX) media. PHYs sit between the Ethernet MAC controller (in an ASIC, FPGA, MCU, or SoC) and the physical medium, handling encoding (MLT-3 / 4B5B for 100 Mbps, Manchester for 10 Mbps), clock recovery, link training, and signal integrity. The KSZ8001L family is widely deployed in industrial embedded networking, factory automation, IP cameras, and any MCU/FPGA design that requires a low-power, low-pin-count Ethernet physical interface.
Key features include 3.3V analog and 1.8V digital dual-supply operation, integrated baseline wander correction, auto-negotiation for 10/100 speed and full/half-duplex, automatic polarity correction, an MII/RMII/SMII MAC interface for low-pin MCU connections, on-chip termination resistors, and HP Auto-MDIX that eliminates the need for manual crossover cable selection. The 48-pin LQFP package supports industrial -40C to +85C operating temperatures.
The KSZ8001L uses a mixed-signal CMOS architecture with DSP-based adaptive equalization, MLT-3 line driver, and a 125 MHz PLL for 100BASE-TX transmit clock synthesis. Its power-down and energy-detect modes let designs cut quiescent draw when the link is idle, important for industrial sensors and PoE endpoints. It is footprint-compatible with the KSZ8001S in 48-SSOP.
Typical applications include industrial Ethernet nodes on STM32/MPU SoCs, IP set-top boxes, networked printers, IP cameras and DVRs, industrial control PLCs, and any embedded system requiring a compact 10/100 Ethernet physical interface via MII or RMII. For fiber runs (cameras, building backbone), the 100BASE-FX mode provides noise-immune connectivity over kilometers of multimode fiber.
When designing with the KSZ8001LTR, ensure the 25 MHz reference oscillator or crystal is within +/-50 ppm and that the center-tap magnetic module (1:1 or 2:1 turns ratio) is properly isolated from switching supplies. The 1.8V digital rail should be decoupled with 0.1uF + 10uF ceramic capacitance to suppress PLL phase jitter. Enable HP Auto-MDIX by default for true plug-and-play cabling.
This page synthesizes Microchip datasheet specifications, cross-reference alternatives, and PCB layout guidance not all available on any single distributor page - giving engineers a one-stop decision source for KSZ8001L-based designs.
ドロップイン代替品: KSZ8001LTR — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: KSZ8001LTR （同一形状・フットプリント） — 相違点: Auto-Negotiation, Operating Temperature, Package, Auto-MDIX, MAC Interface.
クイック比較ツール — 並列比較する代替部品を選択:
KSZ8001L
✅ ドロップイン📋 参考代替品（カタログ未掲載）
KSZ8001LI
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DP83848IVV
✅ ドロップイン✓ 在庫あり
$5.73 / 個
データシートを見る →DP83848IVV/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
KSZ8001LTR 仕様
| Product Type | 10/100BASE-TX/FX Physical Layer Transceiver (PHY) |
| Network Standards | IEEE 802.3u 100BASE-TX, IEEE 802.3 10BASE-T, 100BASE-FX |
| Supply Voltage (Analog) | 3.3 V |
| Supply Voltage (Digital Core) | 1.8 V |
| MAC Interface | MII / RMII / SMII |
| Auto-Negotiation | 10/100 Mbps speed, full/half-duplex |
| Auto-MDIX | Yes (HP Auto-MDIX) |
| Number of Ports | 1 |
| パッケージ | 48-LQFP |
| 動作温度 | -40C to +85C |
| 実装タイプ | Surface Mount |
| Cable Reach (Copper) | 100 m (Cat-3 / Cat-5) |
| Cable Reach (Fiber) | Up to 2 km (multimode, 100BASE-FX) |
| Reference Clock | 25 MHz external crystal or oscillator |
| Status Output | LED indicators for Link / Activity / Speed / Duplex |
KSZ8001LTR ピン構成
| ピン 1 | RXD+ — 100BASE-FX PECL receive positive |
| ピン 2 | RXD- — 100BASE-FX PECL receive negative |
| ピン 3 | FXSD — Fiber signal detect (active high) |
| ピン 4 | TXD+/FXEN — 100BASE-FX PECL transmit / FX enable strap |
| ピン 5 | TPRX+ — Differential twisted pair receive positive |
| ピン 6 | TPRX- — Differential twisted pair receive negative |
| ピン 7 | TRD+ — Differential twisted pair data positive |
| ピン 8 | TRD- — Differential twisted pair data negative |
| ピン 9 | TPTX+ — Differential twisted pair transmit positive |
| ピン 10 | TPTX- — Differential twisted pair transmit negative |
| ピン 11 | AVDD33 — Analog 3.3V supply |
| ピン 12 | AGND — Analog ground |
| ピン 13 | AVDD33 — Analog 3.3V supply |
| ピン 14 | AVDD33 — Analog 3.3V supply |
| ピン 15 | RXER/LED — MII RX error / strap / LED indicator |
| ピン 16 | RXC/LED — MII RX clock / LED indicator |
| ピン 17 | XI — 25 MHz crystal oscillator input |
| ピン 18 | XO — 25 MHz crystal oscillator output |
| ピン 19 | DVDD18 — Digital 1.8V core supply |
| ピン 20 | DGND — Digital ground |
| ピン 21 | DVDD18 — Digital 1.8V core supply |
| ピン 22 | DGND — Digital ground |
| ピン 23 | RXDV/CRS_DV — MII RX data valid / RMII CRS_DV |
| ピン 24 | RXD[0] — MII/RMII RX data bit 0 |
| ピン 25 | RXD[1] — MII/RMII RX data bit 1 |
| ピン 26 | RXD[2] — MII RX data bit 2 (MII mode only) |
| ピン 27 | RXD[3] — MII RX data bit 3 (MII mode only) |
| ピン 28 | TXEN/TXEN0 — MII TX enable / RMII TX enable |
| ピン 29 | TXD[0]/TXD0 — MII/RMII TX data bit 0 |
| ピン 30 | TXD[1]/TXD1 — MII/RMII TX data bit 1 |
| ピン 31 | TXD[2] — MII TX data bit 2 (MII mode only) |
| ピン 32 | TXD[3] — MII TX data bit 3 (MII mode only) |
| ピン 33 | TXC/REF_CLK — MII TX clock / RMII 50 MHz reference clock |
| ピン 34 | MDC — MIIM management clock |
| ピン 35 | MDIO — MIIM management data |
| ピン 36 | RST — Hardware reset (active low) |
| ピン 37 | INT — Interrupt output (active low) |
| ピン 38 | NC — Not connected (per datasheet) |
| ピン 39 | LED_LINK/AN_EN — LED link indicator / auto-negotiation enable strap |
| ピン 40 | LED_SPEED/ISO — LED speed indicator / isolation strap |
| ピン 41 | LED_ACT/DP_SSC — LED activity indicator / digital PAUSE strap |
| ピン 42 | LED_DUP/RMII_OVR — LED duplex indicator / RMII override strap |
| ピン 43 | CONFIG[0] — Configuration strap input 0 |
| ピン 44 | CONFIG[1] — Configuration strap input 1 |
| ピン 45 | PWRDN — Power-down (active high) |
| ピン 46 | NC — Not connected (per datasheet) |
| ピン 47 | AVDD33 — Analog 3.3V supply |
| ピン 48 | AGND — Analog ground |
主な用途
KSZ8001LTR の用途: 7 件s: Industrial Ethernet Nodes on STM32 MPUs, IP Camera and Networked DVR Systems, Embedded IoT Gateways and Smart Sensors, Networked Printers and MFP Devices, Building Automation and HVAC Controllers, Industrial Set-Top Box and Media Appliances, Factory Automation PLCs and Motion Controllers.
Industrial Ethernet Nodes on STM32 MPUs
The KSZ8001LTR's 1.8V core + 3.3V analog dual supply and MII/RMII interface make it a natural fit for industrial Ethernet nodes on STM32, PIC32, and NXP i.MX RT MPUs that already provide 1.8V internally. The 100BASE-TX cable reach of 100 m over Cat-5 covers typical factory-floor wiring. Its -40C to +85C industrial temperature rating and HP Auto-MDIX crossover correction allow direct connection to any switch port without manual crossover cables, simplifying field installation. For low-pin-count MCU designs, the RMII interface saves ~9 GPIO pins versus full MII.
おすすめ
IP Camera and Networked DVR Systems
The KSZ8001LTR supports 100BASE-FX fiber connectivity, which is critical for IP camera installations in electrically noisy industrial environments or for long-run building backbones where copper is impractical. Fiber extends reach to 2 km over multimode fiber with complete immunity to EMI/RFI from motors, drives, and lighting. The on-chip 100BASE-FX PECL serializer eliminates an external fiber transceiver, reducing BOM cost. For indoor Cat-5 camera installations, the Auto-MDIX feature eliminates the polarity concern with PoE injector connections.
おすすめ
Embedded IoT Gateways and Smart Sensors
For IoT gateways and smart sensors that need wired Ethernet backhaul (for reliability versus Wi-Fi), the KSZ8001LTR's 1.8V core supply enables direct connection to low-power MCUs that already produce 1.8V internally. The 3.3V analog rail typically shares the same 3.3V LDO as the rest of the system, simplifying power tree design. Energy-detect power-down modes reduce quiescent current when the link is idle, important for battery-backed or energy-harvested sensor nodes that wake periodically to push telemetry.
おすすめ
Networked Printers and MFP Devices
Office printers and multifunction devices (MFPs) require reliable 10/100 Ethernet connectivity for driver installation, job submission, and embedded web-server management. The KSZ8001LTR's MII/RMII interface connects directly to printer SoCs from major vendors. The integrated termination resistors and Auto-MDIX reduce external BOM by eliminating crossover cable concerns. Auto-negotiation between 10/100 Mbps speeds ensures plug-and-play with both legacy 10 Mbps hubs and modern gigabit infrastructure (gigabit switches auto-negotiate down).
おすすめ
Building Automation and HVAC Controllers
The KSZ8001LTR is widely deployed in building automation controllers for BACnet/IP, Modbus TCP, and proprietary TCP-based HVAC protocols. Its industrial -40C to +85C temperature range covers unconditioned plant-room and rooftop installations. The MII interface connects to small-form-factor RTOS-based MCUs that handle both HVAC control logic and TCP/IP networking. 100BASE-TX cable reach of 100 m covers the longest runs in typical commercial building installations.
おすすめ
Industrial Set-Top Box and Media Appliances
Set-top boxes, digital signage players, and IPTV appliances use the KSZ8001LTR for reliable 10/100 Ethernet connectivity to deliver streaming media, software updates, and management telemetry. The 100BASE-TX link supports QoS-aware traffic prioritization, and Auto-MDIX ensures the appliance works regardless of switch port or patch cable. The small 48-LQFP package integrates cleanly with space-constrained consumer device PCBs.
おすすめ
Factory Automation PLCs and Motion Controllers
For EtherNet/IP, PROFINET, and EtherCAT-adjacent industrial networks, the KSZ8001LTR provides a low-pin-count RMII interface to factory automation processors. Its industrial temperature rating covers cabinet-mounted installations near motor drives. The integrated HP Auto-MDIX eliminates polarity concerns in industrial patch panels that may have inconsistent wiring. The 100BASE-TX interface supports deterministic real-time protocols used in motion control, with the PHY itself adding minimal jitter to time-sensitive Ethernet frames.
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: KSZ8001LTR — 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 | KSZ8001L | KSZ8001LI | DP83848IVV | DP83848IVV/NOPB |
|---|---|---|---|---|---|
| Package | 48-LQFP | 48-LQFP - same | 48-LQFP - same | 48-LQFP - same | 48-LQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments | Texas Instruments |
| Network Standard | 10/100BASE-TX/FX | 10/100BASE-TX/FX | 10/100BASE-TX/FX | 10/100BASE-TX only | 10/100BASE-TX only |
| Supply Voltage | 3.3V + 1.8V dual | 3.3V + 1.8V dual | 3.3V + 1.8V dual | 3.3V single | 3.3V single |
| MAC Interface | MII / RMII / SMII | MII / RMII / SMII | MII / RMII / SMII | MII / RMII | MII / RMII |
| Auto-MDIX | Yes (HP Auto-MDIX) | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C | 0 to 2400 (depending on grade) | -40C to +85C | -40C to +85C | -40C to +85C |
| Fiber Support (FX) | Yes (100BASE-FX) | Yes | Yes | No | No |
| Cable Reach (Copper) | 100 m (Cat-3/Cat-5) | 100 m | 100 m | 100 m | 100 m |
| Reference Clock | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
主な差別化要因
- 100BASE-FX fiber support on-chip （vs DP83848IVV)
- Lower-power 1.8V digital core （vs DP83848IVV)
- SMII interface for MOST networking （vs DP83848IVV)
設計ノート
Magnetic module selection is critical for KSZ8001LTR operation. Use a 1:1 (or 2:1 for 100BASE-TX) center-tap transformer with built-in common-mode choke, such as the Pulse H1102 or Belfuse S5580-A. Place the magnetics within 25 mm of the TPRX/TRD/TPTX pins, and keep the analog ground (AGND) and digital ground (DGND) domains separated, joining them only at the KSZ8001LTR's analog/digital GND pins with a ferrite bead bridge. This prevents switching noise from digital logic and the 1.8V LDO from coupling into the analog PHY signals.
Estimated power dissipation: the KSZ8001LTR consumes approximately 150 mA on the 3.3V analog rail (495 mW) and 100 mA on the 1.8V digital core rail (180 mW) for a total of about 675 mW at full 100BASE-TX operation. Decouple each AVDD33 pin with a 0.1uF ceramic cap placed within 5 mm of the pin, and each DVDD18 pin with a 0.1uF cap + 10uF bulk ceramic on the plane. A 100BASE-TX link uses ~50% of the 3.3V current compared to 10BASE-T, enabling low-power operation in energy-aware designs.
Common pitfalls include: (1) Strap pin configuration errors - the CONFIG[0:1] and LED/AN_EN strap pins set default MII vs RMII, FX vs TX, and pause capability. Pull-up/pull-down values must match the intended mode. (2) 25 MHz clock instability - jitter or frequency error on the XI/XO crystal directly degrades 100BASE-TX eye margin. Use a crystal with +/-50 ppm tolerance or an external 25 MHz CMOS oscillator. (3) RMII reference clock - the KSZ8001LTR's TXC/REF_CLK pin must source 50 MHz from either the MAC or the PHY depending on which is master; misconfiguration results in zero link.
コンプライアンス情報
RoHS and lead-free per Microchip commercial-grade manufacturing; exact RoHS CoC document number is [DATA_NEEDED]. Not AEC-Q100 qualified - choose KSZ8061 or KSZ8462 for automotive Ethernet.
