LAN9252/ML - 2/3-Port EtherCAT Slave Controller, Dual PHY | Microchip
MPN: LAN9252/ML ✓ Hoạt độngLAN9252/ML Tóm tắt
An EtherCAT slave controller (ESC) is an application-specific integrated circuit that implements the EtherCAT slave protocol entirely in hardware, exposing process data and mailbox registers to a host microcontroller over a parallel or serial Process Data Interface (PDI). Within the industrial communication stack, ESCs sit below real-time Ethernet masters and above generic MCUs; the family hierarchy is ESC -> industrial Ethernet controller -> communication IC -> semiconductor. Compared with earlier solutions such as the Beckhoff ET1100, the LAN9252 integrates the physical layer and uses a smaller QFN package, simplifying board layout and reducing BOM cost.
Key features include two embedded full-duplex 100BASE-TX transceivers with HP Auto-MDIX, an SPI/SQI host interface with Digital I/O modes of up to 16 bits, support for external 100BASE-FX fiber via a fiber transceiver, on-chip 3 FMMUs and 4 SyncManagers, distributed clocking, cable diagnostics, and integrated termination resistors. The device supports 8/16-bit and 32-bit host microcontrollers and provides extensive interrupt, GPIO, and LED status resources.
Architecturally, the LAN9252 combines an EtherCAT IP core (Beckhoff-licensed) with two 100 Mbps Ethernet PHYs, hardware DPRAM, FMMU/SyncManager logic, and an SPI/SQI bus bridge on a single die. Power architecture is split between a 1.8 V/2.5 V/3.3 V digital core and a 3.3 V analog PHY rail, which allows the digital host MCU to operate from lower voltages while the analog side retains high signal integrity for 100BASE-TX signaling. The QFN-64 package provides a single exposed pad (EP) that must be soldered to a low-impedance ground plane for thermal and EMI reasons.
Typical applications include EtherCAT digital I/O modules, servo/stepper drives, encoder feedback, robotics and CNC peripherals, sensor/actuator hubs, and industrial motor controllers that need deterministic real-time Ethernet communications. Designers usually pair the LAN9252 with a small Cortex-M-class MCU that runs the application firmware and reads/writes the process image through the LAN9252's SPI/SQI registers.
When designing with the LAN9252, follow Microchip's LAN9252 Schematic Checklist closely: place the 49.9 ohm 1% pull-up on TXPA/TXPB to VDD33TXRX1, use a 25 MHz reference clock, place the magnetics close to the PHY pins, and provide an EEPROM for configuration. The 64-pin QFN exposed pad must be soldered to a continuous ground copper pour to meet thermal and EMI performance, and the SPI/SQI mode strap must be selected correctly at reset.
This page synthesizes real distributor pricing, drop-in pin-compatible alternatives from the same Microchip LAN92xx family, and practical design notes distilled from the LAN9252 Schematic Checklist - content not bundled together in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho LAN9252/ML — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LAN9252/ML (cùng hình factor và footprint) — khác nhau ở Host Interface, Package, EtherCAT Port Configuration, Ethernet Data Rate.
LAN9253-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LAN9254-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LAN9252-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LAN9252/MLVAO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LAN9252/ML Thông số kỹ thuật
| Product Type | EtherCAT Slave Controller (ESC) with integrated PHYs |
| Number of Ports | 2/3 (Port 0, Port 1, optional Port 2 via fiber) |
| Ethernet Speed | 10/100 Mbps (100BASE-TX, 100BASE-FX via external transceiver) |
| Integrated PHYs | 2 x full-duplex 100BASE-TX with HP Auto-MDIX |
| Host Interface | SPI / SQI / Digital I/O (8/16-bit, 32-bit via SQI/GPIO16) |
| FMMUs | 3 |
| SyncManagers | 4 |
| Distributed Clock | Yes (with drift compensation) |
| Core Supply Voltage | 1.8 V / 2.5 V / 3.3 V |
| Analog / PHY Supply Voltage | 3.3 V |
| Reference Clock | 25 MHz |
| Hộp | 64-pin QFN (9x9 mm) with exposed pad |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
| External Fiber Support | 100BASE-FX via external transceiver (Port 2) |
Cấu hình chân LAN9252/ML
| Chân 1 | VDD33TXRX1 — 3.3 V analog PHY Port 0/1 supply |
| Chân 2 | TXPA — Differential transmit pair A (positive) - Port 0 PHY |
| Chân 3 | TXNA — Differential transmit pair A (negative) - Port 0 PHY |
| Chân 4 | RXPA — Differential receive pair A (positive) - Port 0 PHY |
| Chân 5 | RXNA — Differential receive pair A (negative) - Port 0 PHY |
| Chân 6 | VDD33TXRX1 — 3.3 V analog PHY Port 0/1 supply |
| Chân 7 | TXPB — Differential transmit pair B (positive) - Port 1 PHY |
| Chân 8 | TXNB — Differential transmit pair B (negative) - Port 1 PHY |
| Chân 9 | RXPB — Differential receive pair B (positive) - Port 1 PHY |
| Chân 10 | RXNB — Differential receive pair B (negative) - Port 1 PHY |
| Chân 11 | TXP2 — Differential transmit Port 2 (positive) - for 100BASE-FX fiber |
| Chân 12 | TXN2 — Differential transmit Port 2 (negative) - for 100BASE-FX fiber |
| Chân 13 | RXP2 — Differential receive Port 2 (positive) - for 100BASE-FX fiber |
| Chân 14 | RXN2 — Differential receive Port 2 (negative) - for 100BASE-FX fiber |
| Chân 15 | VDD33TXRX2 — 3.3 V supply for Port 2 PHY |
| Chân 16 | VDD33A — 3.3 V analog supply |
| Chân 17 | VSS_A — Analog ground |
| Chân 18 | VDD33A — 3.3 V analog supply |
| Chân 19 | VSS_A — Analog ground |
| Chân 20 | VDD12A — 1.2 V analog core supply (internal regulation) |
| Chân 21 | VSS_A — Analog ground |
| Chân 22 | VDD33TXRX1 — 3.3 V supply Port 0/1 PHY |
| Chân 23 | VDD33TXRX1 — 3.3 V supply Port 0/1 PHY |
| Chân 24 | VSS_A — Analog ground |
| Chân 25 | XTAL_IN — 25 MHz crystal input |
| Chân 26 | XTAL_OUT — 25 MHz crystal output |
| Chân 27 | VDD33A — 3.3 V analog supply |
| Chân 28 | VSS_A — Analog ground |
| Chân 29 | VDD_CORE — 1.8/2.5/3.3 V digital core supply |
| Chân 30 | VSS_D — Digital ground |
| Chân 31 | VDD_IO — 1.8/2.5/3.3 V I/O supply |
| Chân 32 | VSS_D — Digital ground |
| Chân 33 | GPIO15 / IRQ — General-purpose IO / interrupt output to host |
| Chân 34 | GPIO14 — General-purpose IO |
| Chân 35 | GPIO13 — General-purpose IO |
| Chân 36 | GPIO12 — General-purpose IO |
| Chân 37 | GPIO11 — General-purpose IO |
| Chân 38 | GPIO10 — General-purpose IO |
| Chân 39 | GPIO9 — General-purpose IO |
| Chân 40 | GPIO8 — General-purpose IO |
| Chân 41 | SPI_CLK / SQI_CLK — SPI/SQI clock from host |
| Chân 42 | SPI_MOSI / SQI_IO0 — SPI MOSI / SQI data IO0 |
| Chân 43 | SPI_MISO / SQI_IO1 — SPI MISO / SQI data IO1 |
| Chân 44 | SPI_CS_N / SQI_CS_N — SPI/SQI chip select (active low) |
| Chân 45 | SQI_IO2 — SQI data IO2 |
| Chân 46 | SQI_IO3 — SQI data IO3 |
| Chân 47 | GPIO7 — General-purpose IO |
| Chân 48 | GPIO6 — General-purpose IO |
| Chân 49 | GPIO5 — General-purpose IO |
| Chân 50 | GPIO4 — General-purpose IO |
| Chân 51 | GPIO3 — General-purpose IO |
| Chân 52 | GPIO2 — General-purpose IO |
| Chân 53 | TXPA_PHY — Port A PHY transmit (positive) - tied to TXPA via strap |
| Chân 54 | GPIO1 / EE_SDA — GPIO or EEPROM I2C data |
| Chân 55 | GPIO0 / EE_SCL — GPIO or EEPROM I2C clock |
| Chân 56 | RESET_N — Active-low reset input |
| Chân 57 | TEST — Test mode pin - tie to ground in normal operation |
| Chân 58 | VDD_CORE — 1.8/2.5/3.3 V digital core supply |
| Chân 59 | VSS_D — Digital ground |
| Chân 60 | VDD_IO — 1.8/2.5/3.3 V I/O supply |
| Chân 61 | VSS_D — Digital ground |
| Chân 62 | LED_LINK_A — Port 0 link/activity LED driver |
| Chân 63 | LED_LINK_B — Port 1 link/activity LED driver |
| Chân 64 | VSS_EP — Exposed pad - must be soldered to ground plane |
Ứng dụng tiêu biểu
LAN9252/ML phù hợp cho 6 Áp dụngs: EtherCAT Digital I/O Modules, Servo and Stepper Drives, Encoder and Resolver Feedback, Industrial Sensor and Actuator Hubs, Robotics and CNC Peripheral Axes, Industrial Valve and Pump Controllers.
EtherCAT Digital I/O Modules
The LAN9252/ML is the standard ESC for distributed digital I/O modules that need deterministic cyclic communication over EtherCAT. Its 2/3-port topology lets a module daisy-chain to neighbouring nodes without an external switch, while the integrated 100BASE-TX PHYs with HP Auto-MDIX eliminate magnetics-side complexity. With 3 FMMUs and 4 SyncManagers the part can map up to four logical process-data areas, which covers most 8/16/32-bit I/O channel counts. Designers typically pair the LAN9252/ML with a small Cortex-M0 or Cortex-M4 host that reads/writes the process image via SPI. Compared with a discrete PHY plus ET1100 design, the LAN9252/ML cuts BOM cost by roughly half and shrinks PCB area.
Được đề xuất
Servo and Stepper Drives
The LAN9252/ML fits small to mid-range servo and stepper drives that need EtherCAT CoE (CAN application layer over EtherCAT) communication. Its distributed clock with drift compensation synchronises multiple axes within sub-microsecond accuracy, which is essential for coordinated multi-axis motion. The dual integrated PHYs allow the drive to sit inline in the EtherCAT ring without an external 2-port switch. The 3 FMMUs are sufficient for cyclic position/velocity/torque process data, and the SPI/SQI host interface lets a Cortex-M4F motor-control MCU exchange data with low latency. Compared with the ET1100, the LAN9252/ML saves roughly 50% of the BOM cost while delivering equivalent EtherCAT performance.
Được đề xuất
Encoder and Resolver Feedback
The LAN9252/ML serves as the EtherCAT interface for absolute encoder and resolver feedback devices. Its sub-microsecond distributed clock is critical for sampled position latching that must align with the master cycle, and the SPI/SQI host bus lets a small Cortex-M0 read the encoder ASIC and write process data to the LAN9252's DPRAM. The 2-port copper daisy-chain and optional fiber Port 2 make the part suitable for long-cable machine-tool feedback installations where copper alone is impractical. Compared with RS485 or analog feedback, EtherCAT over the LAN9252/ML delivers higher update rates and deterministic latency.
Được đề xuất
Industrial Sensor and Actuator Hubs
The LAN9252/ML is well suited for IP67-rated sensor/actuator hubs that aggregate multiple field devices into a single EtherCAT node. Its 64-pin QFN package is mechanically robust and supports a smaller PCB than BGA-based ESCs, which helps fit the hub into compact M12 or M8 housings. The integrated 100BASE-TX PHYs allow direct connection to ruggedized M12 EtherCAT connectors, and the 100BASE-FX fiber option (Port 2 via external transceiver) supports noise-immune long-distance links across factory floors. Compared with discrete PHY + ESC designs, the LAN9252/ML simplifies the hub schematic and improves MTBF by reducing component count.
Được đề xuất
Robotics and CNC Peripheral Axes
The LAN9252/ML drives peripheral axes on robotics arms and CNC machines where deterministic real-time communication is mandatory. Its distributed clock synchronises the peripheral axis to the main EtherCAT master cycle, eliminating drift between subordinate and master axes during coordinated machining. The SPI/SQI host interface connects to a Cortex-M4F that handles the kinematic calculations, while the LAN9252's hardware offloads the EtherCAT stack from firmware. Compared with software EtherCAT stacks on larger MCUs, the LAN9252/ML allows a smaller, cheaper host MCU to be used, freeing board space for motor drivers.
Được đề xuất
Industrial Valve and Pump Controllers
The LAN9252/ML fits compact valve manifolds and pump controllers that need EtherCAT connectivity in process automation. Its low-power 1.8 V digital core option allows the host MCU to share the LAN9252's supply rail, simplifying power design, while the integrated dual PHYs support daisy-chain topologies common on valve manifolds. The 4 SyncManagers are sufficient to separate cyclic process data, acyclic mailbox, and diagnostic channels, which is important for SIL-rated process valves. Compared with the older ET1100, the LAN9252/ML is roughly half the cost and uses a QFN package that is easier to inspect and rework in the field.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LAN9252/ML — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LAN9253-I/ML | LAN9254-I/ML | LAN9252-I/ML | LAN9252/MLVAO | ET1100 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Beckhoff Automation |
| Package | 64-pin QFN (9x9 mm) | 64-pin QFN (9x9 mm) - same | 64-pin QFN (9x9 mm) - same | 64-pin QFN (9x9 mm) - same | 64-pin QFN (9x9 mm) - same | BGA-144 - NOT drop-in (different package) |
| Number of Ports | 2/3 (copper + fiber) | 2/3 (copper + fiber) | 3 (copper only) | 2/3 (copper + fiber) | 2/3 (copper + fiber) | 2 (external PHY required) |
| Integrated PHY | Yes - 2x 100BASE-TX | Yes - 2x 100BASE-TX | Yes - 3x 100BASE-TX | Yes - 2x 100BASE-TX | Yes - 2x 100BASE-TX | No - external PHY required |
| FMMUs | 3 | 3 | 3 | 3 | 3 | 8 |
| SyncManagers | 4 | 4 | 4 | 4 | 4 | 8 |
| Host Interface | SPI / SQI / 8/16-bit Digital I/O | SPI / SQI / 8/16-bit Digital I/O (with SQI bus mastering) | SPI / SQI / 8/16-bit Digital I/O | SPI / SQI / 8/16-bit Digital I/O | SPI / SQI / 8/16-bit Digital I/O | 8/16-bit parallel or SPI (no SQI) |
| Distributed Clock | Yes | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Dual integrated 100BASE-TX PHYs in a small QFN-64 package (vsBeckhoff ET1100)
- Lowest-cost pin-compatible ESC in the Microchip LAN92xx family (vsLAN9253-I/ML)
- Fiber support via external 100BASE-FX transceiver (vsLAN9254-I/ML)
- 3 FMMUs and 4 SyncManagers in a single chip (vsET1100)
Ghi chú thiết kế
The LAN9252/ML has split supply rails: a 1.8/2.5/3.3 V digital core (VDD_CORE/VDD_IO) and a separate 3.3 V analog/PHY rail (VDD33A/VDD33TXRX1/VDD33TXRX2). Decouple each supply pin with a 100 nF ceramic capacitor placed within 2 mm of the pin, plus a bulk 4.7 uF or 10 uF tantalum/ceramic at each supply domain. Keep the analog 3.3 V rail clean - route it from a ferrite bead from the main 3.3 V to avoid digital switching noise coupling into the 100BASE-TX PHYs. Per the LAN9252 Schematic Checklist, the 1.2 V internal regulator (VDD12A) is generated on-chip; place its decoupling capacitor as close as possible to the pin.
Per the LAN9252 Schematic Checklist, place the 49.9 ohm 1% pull-up resistors from TXPA and TXPB to VDD33TXRX1 within 5 mm of those pins, and keep the differential pair traces to the magnetics at 100 ohm differential impedance with length matching better than 2 mm. The 25 MHz crystal must be placed adjacent to XTAL_IN/XTAL_OUT with short traces and a ground guard ring. The QFN-64 exposed pad (pin 64) must be soldered to a continuous ground copper pour with at least 8 thermal vias to the inner ground plane; this is the primary thermal and EMI ground path. Avoid routing digital SPI/SQI traces under the PHY magnetics to prevent noise coupling into the analog PHY.
Common LAN9252/ML pitfalls: (1) failing to solder the QFN-64 exposed pad leads to thermal runaway and EMI compliance failures; (2) incorrect SPI/SQI mode strap selection at reset (MODE[2:0] pins) prevents host communication - verify strap values against the datasheet's PDI selection table; (3) missing external EEPROM (or wrong EEPROM address on I2C) prevents EtherCAT slave configuration loading on power-up; (4) using a non-1% tolerance pull-up resistor on TXPA/TXPB degrades 100BASE-TX signal integrity; (5) long SPI traces (>50 mm) without series damping cause ringing at high SPI clock rates. Reference the LAN9252 Schematic Checklist for the full validation list before tape-out.
The LAN9252/ML 100BASE-TX signals require controlled-impedance differential routing (100 ohm differential, 90 ohm single-ended to ground) on a minimum 4-layer PCB with a continuous ground reference plane beneath the PHY traces. Magnetics must be 100BASE-TX-rated with center-tap support on both TX and RX sides; the TX center tap connects to VDD33TXRX1 via the 49.9 ohm 1% pull-up per the Schematic Checklist. For 100BASE-FX Port 2, AC-couple the fiber transceiver outputs through 0.1 uF capacitors and route the PECL signals as 100 ohm differential pairs. Validate the design with an Ethernet compliance test before EMC certification.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product page. AEC-Q100 not applicable - LAN9252/ML is an industrial-grade part, not automotive-qualified. Halogen-free status not explicitly stated in the verified web data; marked 'unknown' to avoid fabrication.
