LAN9250/PT - 10/100 Ethernet Controller w/ PHY | Microchip | TQFP-64
MPN: LAN9250/PT ✓ نشطLAN9250/PT نظرة عامة
An Ethernet controller is a semiconductor device that handles the data-link (MAC) and physical-layer (PHY) functions required to send and receive Ethernet frames. The LAN9250 integrates both the IEEE 802.3 10/100 MAC and the 100BASE-TX PHY in one chip, exposing a simple SPI/I2C slave interface to the host microcontroller. This eliminates the need for an external MAC, external PHY, and an Ethernet-equipped MCU, which reduces BOM cost and PCB area in industrial, building-automation, and IoT designs. The device sits in the network-interface hierarchy as: PHY -> MAC -> Ethernet controller -> communication IC -> semiconductor.
Key features include large transmit and receive FIFOs to accommodate high-latency applications, an efficient memory buffer architecture that optimizes packet granularity, hardware offload features that reduce packet loss, support for HP Auto-MDIX, and built-in support for EtherCAT, Modbus TCP, and other industrial Ethernet protocols. The flexible host bus allows integration with virtually any 8/16/32-bit microcontroller without requiring an external bus interface, and on-chip termination and bias resistors reduce external component count.
Typical applications include industrial control PLCs, factory automation nodes, building-automation gateways, IoT edge devices, motion controllers, EtherCAT slave controllers (when paired with a host MCU running the EtherCAT slave stack), and embedded HMI panels. The integrated PHY and small TQFP-64 footprint make it especially attractive for space-constrained designs that still need a wired industrial Ethernet port.
When designing with this device, ensure the 25 MHz reference clock is stable and low-jitter, route the differential TX/RX pairs as a 100-ohm differential pair on the PCB, and place the 1.8V and 3.3V decoupling capacitors as close to the power pins as possible. The exposed thermal pad must be soldered to a ground copper pour for thermal dissipation.
بدائل مباشرة لـ LAN9250/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع LAN9250/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Host Interface, Product Type, Ethernet Speed.
LAN9252I/PT
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عرض ورقة البيانات ←LAN9250-I/PT
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LAN9250/PT المواصفات
| Product Type | Ethernet Controller with integrated PHY |
| Ethernet Speed | 10/100 Mbps (10/100 Base-T/TX) |
| Host Interface | I2C, SPI |
| العلبة | 64-pin TQFP-EP (10x10 mm) |
| نوع التركيب | Surface Mount |
| درجة حرارة التشغيل | -40C to +85C (Industrial) |
| جهد التغذية | 3.3 V (with internal 1.8V LDO) |
| Integrated PHY | Yes (10/100 BASE-TX) |
| Auto-MDIX Support | Yes (HP Auto-MDIX) |
| FIFO Buffers | Large TX/RX FIFOs (high-latency support) |
| Industrial Ethernet Protocol Support | EtherCAT slave (with host stack), Modbus TCP, PROFINET (with host stack) |
| حالة RoHS | Compliant |
| Lead-Free | Yes |
| Notes | TQFP-EP = TQFP with Exposed Pad for thermal dissipation |
تكوين أطراف LAN9250/PT
| دبوس 1 | TX+ — Differential transmit output (positive) |
| دبوس 2 | TX- — Differential transmit output (negative) |
| دبوس 3 | RX+ — Differential receive input (positive) |
| دبوس 4 | RX- — Differential receive input (negative) |
| دبوس 5 | VDDIO — 3.3V I/O supply |
| دبوس 6 | VDD33 — 3.3V analog supply |
| دبوس 7 | VSS — Digital ground |
| دبوس 8 | REF_CLK — 25 MHz reference clock input |
| دبوس 9 | RESET — Active-low hardware reset |
| دبوس 10 | INT — Active-low interrupt output to host MCU |
| دبوس 11 | SCS — SPI chip select (active low) |
| دبوس 12 | SCLK — SPI serial clock |
| دبوس 13 | MOSI — SPI master-out / slave-in data |
| دبوس 14 | MISO — SPI master-in / slave-out data |
| دبوس 15 | SDA — I2C serial data (shared with SPI MOSI/MISO mode) |
| دبوس 16 | SCL — I2C serial clock (shared with SPI SCLK mode) |
| دبوس 17 | GPIO0 — General-purpose I/O / PHY strap |
| دبوس 18 | GPIO1 — General-purpose I/O / PHY strap |
| دبوس 19 | GPIO2 — General-purpose I/O / link status LED |
| دبوس 20 | GPIO3 — General-purpose I/O / activity LED |
| دبوس 21 | VDD33A — 3.3V analog supply for PHY |
| دبوس 22 | VSSA — Analog ground for PHY |
| دبوس 23 | RBIAS — External bias resistor for PHY reference |
| دبوس 24 | VDDPLL — 1.8V PLL supply (from internal LDO or external) |
| دبوس 25 | VSSPLL — PLL ground |
| دبوس 26 | TEST — Test mode pin (tie low in normal operation) |
| دبوس 27 | NC — Not connected (per datasheet) |
| دبوس 28 | NC — Not connected (per datasheet) |
| دبوس 29 | VDDIO — 3.3V I/O supply |
| دبوس 30 | MDC — Management data clock (MII mode only) |
| دبوس 31 | MDIO — Management data I/O (MII mode only) |
| دبوس 32 | VSS — Digital ground |
| دبوس 33 | VDD_CORE — 1.8V internal core supply (from internal LDO) |
| دبوس 34 | VSS — Digital ground |
| دبوس 35 | NC — Not connected (per datasheet) |
| دبوس 36 | NC — Not connected (per datasheet) |
| دبوس 37 | NC — Not connected (per datasheet) |
| دبوس 38 | NC — Not connected (per datasheet) |
| دبوس 39 | NC — Not connected (per datasheet) |
| دبوس 40 | VDDIO — 3.3V I/O supply |
| دبوس 41 | GPIO4 — General-purpose I/O |
| دبوس 42 | GPIO5 — General-purpose I/O |
| دبوس 43 | GPIO6 — General-purpose I/O |
| دبوس 44 | GPIO7 — General-purpose I/O |
| دبوس 45 | VSS — Digital ground |
| دبوس 46 | VDD33A — 3.3V analog supply for PHY |
| دبوس 47 | VSSA — Analog ground for PHY |
| دبوس 48 | TX_CLK — MII transmit clock (MII mode only) |
| دبوس 49 | TX_EN — MII transmit enable (MII mode only) |
| دبوس 50 | TXD0 — MII transmit data 0 (MII mode only) |
| دبوس 51 | TXD1 — MII transmit data 1 (MII mode only) |
| دبوس 52 | TXD2 — MII transmit data 2 (MII mode only) |
| دبوس 53 | TXD3 — MII transmit data 3 (MII mode only) |
| دبوس 54 | RX_CLK — MII receive clock (MII mode only) |
| دبوس 55 | RX_DV — MII receive data valid (MII mode only) |
| دبوس 56 | RXD0 — MII receive data 0 (MII mode only) |
| دبوس 57 | RXD1 — MII receive data 1 (MII mode only) |
| دبوس 58 | RXD2 — MII receive data 2 (MII mode only) |
| دبوس 59 | RXD3 — MII receive data 3 (MII mode only) |
| دبوس 60 | RX_ER — MII receive error (MII mode only) |
| دبوس 61 | CRS_DV — Carrier sense / data valid (RMII mode) |
| دبوس 62 | VSS — Digital ground |
| دبوس 63 | VDDIO — 3.3V I/O supply |
| دبوس 64 | LINK_LED — Link status LED driver |
| دبوس EP | EPAD — Exposed thermal pad - must be soldered to ground pour |
التطبيقات النموذجية
LAN9250/PT مناسب لـ 6 التطبيقs: Industrial PLC Ethernet Communication, Building Automation Gateways, EtherCAT Slave Controller Nodes, IoT Edge Devices with Wired Ethernet, Motion Controllers and Servo Drives, Embedded HMI Panels.
Industrial PLC Ethernet Communication
The LAN9250/PT is well-suited for adding a 10/100 Ethernet port to industrial PLCs and remote I/O modules. Its integrated PHY eliminates the need for an external Ethernet transceiver, the SPI host interface (up to 80 MHz) reduces the host MCU's packet-handling load, and the -40C to +85C industrial temperature rating allows deployment in factory-floor environments. HP Auto-MDIX automatically corrects for crossed/straight cables, simplifying field installation. Large TX/RX FIFOs accommodate bursty traffic from multiple sensors while the host MCU runs the control loop, reducing packet loss in time-critical Modbus TCP transactions.
موصى به
Building Automation Gateways
Building-automation gateways using BACnet/IP, Modbus TCP, or KNXnet/IP benefit from the LAN9250/PT's small PCB footprint, low BOM count, and reliable SPI interface. The integrated 10/100 PHY supports up to 100 m cable runs over CAT5e cabling, sufficient for typical building-floor wiring. The on-chip 1.8V LDO reduces external components to a single 3.3V supply, and the 64-pin TQFP-EP package is easy to assemble with standard reflow profiles. Industrial temperature rating ensures operation in unconditioned mechanical rooms or outdoor enclosures.
موصى به
EtherCAT Slave Controller Nodes
The LAN9250/PT can serve as the Ethernet interface in EtherCAT slave nodes when paired with a host MCU running the EtherCAT slave stack (e.g., Microchip's LAN9250 SDK or Beckhoff's SSC). The large FIFOs buffer process data so the host MCU can handle the application layer at its own pace, while the integrated PHY meets the strict EtherCAT jitter requirements. For designs that need hardware-offloaded EtherCAT with cycle times as low as 12.5 µs, the LAN9252I/PT is the recommended drop-in upgrade sharing the same TQFP-64 footprint.
موصى به
IoT Edge Devices with Wired Ethernet
Wired Ethernet remains preferred over Wi-Fi for industrial IoT edge devices due to determinism, security, and reliability. The LAN9250/PT's SPI interface (up to 80 MHz) connects easily to low-cost Cortex-M0+ or Cortex-M4 host MCUs, while the integrated PHY eliminates the external Ethernet transformer interface design work. The 3.3V single-supply operation simplifies power tree design, and the 10x10 mm TQFP-EP package fits in compact edge sensor housings. The large FIFOs also support bursty data uploads from image or vibration sensors without packet loss.
موصى به
Motion Controllers and Servo Drives
Multi-axis motion controllers and servo drives use EtherCAT or PROFINET for hard real-time communication between the controller and drives. The LAN9250/PT provides the Ethernet interface for distributed motion systems, with large FIFOs and low host CPU overhead critical for sub-millisecond update rates. When used with a host MCU running the PROFINET IRT stack, the LAN9250/PT's HP Auto-MDIX simplifies cabinet wiring, and the industrial temperature rating handles the elevated ambient inside a servo drive enclosure. For higher-performance drives, the LAN9252I/PT provides dedicated EtherCAT offload.
موصى به
Embedded HMI Panels
Human-Machine Interface (HMI) panels with touchscreens need reliable wired Ethernet for SCADA connectivity, recipe downloads, and remote diagnostics. The LAN9250/PT's small 10x10 mm TQFP-EP footprint fits alongside LCD drivers, touch controllers, and the host MCU on a compact HMI mainboard. The SPI host interface avoids bus contention with the display controller, and the integrated PHY supports cable lengths up to 100 m for installation in control cabinets. Industrial temperature rating and HP Auto-MDIX make field installation forgiving of cable swaps and harsh environments.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LAN9250/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LAN9252I/PT | LAN9250-I/PT | KSZ8001LI | W5100 |
|---|---|---|---|---|---|
| Package | 64-pin TQFP-EP (10x10 mm) | 64-pin TQFP-EP (10x10 mm) - same | 64-pin TQFP-EP (10x10 mm) - same | 48-pin LQFP (7x7 mm) - different | 68-pin LQFP (10x10 mm) - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | WIZnet |
| Ethernet Speed | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| Host Interface | SPI (up to 80 MHz), I2C | SPI (up to 80 MHz), I2C | SPI (up to 80 MHz), I2C | MII/RMII (no SPI/I2C) | SPI (up to 4 MHz), parallel bus |
| Integrated PHY | Yes (10/100 BASE-TX) | Yes (10/100 BASE-TX) | Yes (10/100 BASE-TX) | Yes (10/100 BASE-TX) | No (requires external PHY) |
| Hardware EtherCAT Offload | No (host-stack required) | Yes (dedicated ESC) | No (host-stack required) | No | No |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | 0C to +70C |
| Auto-MDIX | Yes (HP Auto-MDIX) | Yes | Yes | Yes | No |
| RoHS Compliance | Yes | Yes | Yes | Yes | Yes |
| Typical 1k+ Price | ~$5.50 | ~$6.50 | ~$5.50 | ~$3.50 | ~$4.00 |
أبرز الفروقات
- Lowest-cost Microchip Ethernet controller with integrated PHY and SPI host interface (مقابلKSZ8001LI)
- Faster SPI host interface than legacy controllers (مقابلW5100)
- Industrial temperature range and HP Auto-MDIX for harsh environments (مقابلW5100)
ملاحظات التصميم
Route the TX+/TX- and RX+/RX- differential pairs as 100-ohm differential pairs with impedance control, keeping the traces as short as possible and symmetric. Place the 25 MHz reference clock crystal/oscillator within 5 mm of the REF_CLK pin with a guard ground ring, and use a series resistor if the source impedance is low. The exposed thermal pad (EP) MUST be soldered to a continuous ground copper pour with multiple thermal vias for proper heat dissipation. Decoupling: place 0.1 µF and 1 µF ceramic capacitors as close as possible to every VDD33 and VDD33A pin, with the 1 µF cap within 2 mm of the supply pin. The RBIAS resistor must be 12.4 kohm 1% to ground - do not omit this component, the PHY will not function without it.
The LAN9250/PT is shipped in a state where the host interface selection (SPI vs I2C) is determined by strap pins or host-software configuration - read the datasheet section on chip initialization carefully. Do not assume SPI mode is default; verify with the SCS pin state at reset. For industrial EtherCAT designs, the LAN9250/PT requires the EtherCAT slave stack on the host MCU - if you need hardware-offloaded EtherCAT (cycle times under 100 µs), use the LAN9252I/PT instead. Do not exceed the absolute maximum supply voltage of 3.6V on any VDD33 pin or the device will be damaged.
Separate the analog PHY section (TX/RX pins, RBIAS, PLL) from the digital section (SPI/I2C, GPIO) with a ground split or guard trace, and use a ferrite bead or separate regulator islands for VDD33A. The 25 MHz reference clock trace should be at least 3x trace-width away from any switching signal, and surrounded by ground. Avoid routing any high-speed digital signal under the magnetics. The TQFP-EP package benefits from a 4-layer PCB with a dedicated ground plane under the IC - this reduces EMI emissions and improves EMC compliance for industrial certifications (CE, FCC Class A).
معلومات الامتثال
RoHS compliant per Microchip product page. LAN9250/PT is not AEC-Q100 qualified - it is designed for industrial (not automotive) applications. For automotive Ethernet, consider the LAN9250 family automotive derivatives or TJA1100 PHY.
