LAN9313-NU - 3-Port 10/100 Ethernet Switch | Microchip
MPN: LAN9313-NU ✓ Hoạt độngLAN9313-NU Tóm tắt
A managed Ethernet switch is a network bridge IC that interconnects multiple Ethernet segments at Layer 2, learning MAC addresses, filtering frames, and forwarding traffic with minimal host-CPU intervention. Within the broader hierarchy, the LAN9313 belongs to the category: Ethernet switch > managed switch > Layer-2 switch > networking interface IC > semiconductor. The integrated PHYs, MAC, and switch fabric eliminate the need for external PHY or magnetics-control circuitry, dramatically reducing BOM cost and PCB area compared with discrete three-chip solutions.
Key features include two integrated 10/100 PHYs with HP Auto-MDIX, a high-performance 3-port switch fabric with 1536-bit frame forwarding, hardware-accelerated 802.1Q VLAN tagging, 802.1p QoS priority queuing, port-based and tag-based VLANs, ingress rate limiting, and head-of-line blocking prevention. The 16-bit host-bus MII interface simplifies connection to most embedded microcontrollers and MPUs, while the EEPROM-less default configuration reduces firmware bring-up time.
Architecturally, the device uses an on-chip packet memory, store-and-forward switching, and per-port QoS/ACL tables. Internal PHY DSP blocks handle adaptive equalization, baseline wander correction, and crosstalk compensation across 100m of Cat-5 cable, ensuring robust link integrity in noisy industrial environments.
Typical applications include industrial factory automation, building automation gateways, networked embedded sensors, IP-based access control, automotive infotainment networks, point-of-sale terminals, and any embedded system requiring a low-power, BOM-optimized multi-port Ethernet switch.
When designing with the LAN9313-NU, follow the reference schematic and magnetics selection guide in the manufacturer datasheet; the VTQFP exposed pad must be soldered to a sufficient ground copper pour for thermal dissipation and EMI return-path integrity.
This page consolidates distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving procurement and design engineers a single authoritative reference for the LAN9313-NU.
Bộ thay thế dễ dàng lắp đặt cho LAN9313-NU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
LAN9303-NU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LAN9353-NU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LAN9313-NU-TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LAN9313i-NU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LAN9313-NU Thông số kỹ thuật (bản công bố của nhà sản xuất)
| Product Type | Managed 3-Port 10/100 Ethernet Switch |
| Number of Ports | 3 (2 external PHYs + 1 host/MII port) |
| Ethernet Standard | IEEE 802.3 (10BASE-T/100BASE-TX), 802.1D, 802.1Q |
| Tốc độ dữ liệu | 10/100 Mbps |
| Duplex Mode | Full and Half Duplex |
| Host Interface | MII (16-bit), Parallel |
| Integrated PHYs | 2 (HP Auto-MDIX) |
| Switch Architecture | Store-and-Forward |
| MAC Address Table | 1K entries |
| VLAN Support | IEEE 802.1Q, port- and tag-based |
| QoS Support | IEEE 802.1p, 4 priority queues |
| Hộp | 128-pin VTQFP, 14x14 mm |
| Điện áp cung cấp | 3.3 V (I/O and analog); 1.8 V or 1.2 V internal core |
| Nhiệt độ hoạt động | -40C to +85C (industrial grade) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| JEDEC Package Standard | JEDEC MS-026 compliant VTQFP |
Cấu hình chân LAN9313-NU
| Chân 1 | VDD_IO — 3.3 V I/O supply |
| Chân 2 | VDD_CORE — 1.8 V/1.2 V core supply |
| Chân 3 | GND — Ground |
| Chân 4 | MII_TXD0 — MII transmit data bit 0 |
| Chân 5 | MII_TXD1 — MII transmit data bit 1 |
| Chân 6 | MII_TXD2 — MII transmit data bit 2 |
| Chân 7 | MII_TXD3 — MII transmit data bit 3 |
| Chân 8 | MII_TXEN — MII transmit enable |
| Chân 9 | MII_TXER — MII transmit error |
| Chân 10 | MII_TXCLK — MII transmit clock |
| Chân 11 | MII_COL — MII collision detect |
| Chân 12 | MII_CRS — MII carrier sense |
| Chân 13 | MII_RXD0 — MII receive data bit 0 |
| Chân 14 | MII_RXD1 — MII receive data bit 1 |
| Chân 15 | MII_RXD2 — MII receive data bit 2 |
| Chân 16 | MII_RXD3 — MII receive data bit 3 |
| Chân 17 | MII_RXDV — MII receive data valid |
| Chân 18 | MII_RXER — MII receive error |
| Chân 19 | MII_RXCLK — MII receive clock |
| Chân 20 | MII_MDC — MII management data clock |
| Chân 21 | MII_MDIO — MII management data I/O |
| Chân 22 | nRESET — Device reset (active low) |
| Chân 23 | EEPROM_CS — EEPROM chip select |
| Chân 24 | EEPROM_SK — EEPROM serial clock |
| Chân 25 | EEPROM_DI — EEPROM data in |
| Chân 26 | EEPROM_DO — EEPROM data out |
| Chân 27 | LED1_P1 — PHY1 activity/link LED |
| Chân 28 | LED2_P1 — PHY1 speed LED |
| Chân 29 | LED1_P2 — PHY2 activity/link LED |
| Chân 30 | LED2_P2 — PHY2 speed LED |
| Chân 31 | PHY1_TXP — PHY1 transmit positive |
| Chân 32 | PHY1_TXN — PHY1 transmit negative |
| Chân 33 | PHY1_RXP — PHY1 receive positive |
| Chân 34 | PHY1_RXN — PHY1 receive negative |
| Chân 35 | PHY1_AVDD — PHY1 analog 3.3 V supply |
| Chân 36 | PHY1_AGND — PHY1 analog ground |
| Chân 37 | PHY2_TXP — PHY2 transmit positive |
| Chân 38 | PHY2_TXN — PHY2 transmit negative |
| Chân 39 | PHY2_RXP — PHY2 receive positive |
| Chân 40 | PHY2_RXN — PHY2 receive negative |
| Chân 41 | PHY2_AVDD — PHY2 analog 3.3 V supply |
| Chân 42 | PHY2_AGND — PHY2 analog ground |
| Chân 43 | VDDPLL — PLL analog 3.3 V supply |
| Chân 44 | GNDPLL — PLL analog ground |
| Chân 45 | XIN — 25 MHz crystal input |
| Chân 46 | XOUT — 25 MHz crystal output |
| Chân 47 | TEST — Test mode (tie low for normal operation) |
| Chân 48 | nIRQ — Interrupt request (active low) |
| Chân 49 | CFG[0] — Configuration strap bit 0 |
| Chân 50 | CFG[1] — Configuration strap bit 1 |
| Chân 51 | CFG[2] — Configuration strap bit 2 |
| Chân 52 | CFG[3] — Configuration strap bit 3 |
| Chân 53 | VDD_CORE — Core supply |
| Chân 54 | GND — Ground |
| Chân 55 | VDD_IO — I/O supply |
| Chân 56 | GND — Ground |
| Chân 57 | GPIO[0] — General-purpose I/O 0 |
| Chân 58 | GPIO[1] — General-purpose I/O 1 |
| Chân 59 | GPIO[2] — General-purpose I/O 2 |
| Chân 60 | GPIO[3] — General-purpose I/O 3 |
| Chân 61 | GPIO[4] — General-purpose I/O 4 |
| Chân 62 | GPIO[5] — General-purpose I/O 5 |
| Chân 63 | GPIO[6] — General-purpose I/O 6 |
| Chân 64 | GPIO[7] — General-purpose I/O 7 |
| Chân 65 | GPIO[8] — General-purpose I/O 8 |
| Chân 66 | GPIO[9] — General-purpose I/O 9 |
| Chân 67 | GPIO[10] — General-purpose I/O 10 |
| Chân 68 | GPIO[11] — General-purpose I/O 11 |
| Chân 69 | GPIO[12] — General-purpose I/O 12 |
| Chân 70 | GPIO[13] — General-purpose I/O 13 |
| Chân 71 | GPIO[14] — General-purpose I/O 14 |
| Chân 72 | GPIO[15] — General-purpose I/O 15 |
| Chân 73 | VDD_CORE — Core supply |
| Chân 74 | GND — Ground |
| Chân 75 | VDD_IO — I/O supply |
| Chân 76 | GND — Ground |
| Chân 77 | NC — Not connected (per datasheet) |
| Chân 78 | NC — Not connected (per datasheet) |
| Chân 79 | NC — Not connected (per datasheet) |
| Chân 80 | NC — Not connected (per datasheet) |
| Chân 81 | VDD_CORE — Core supply |
| Chân 82 | GND — Ground |
| Chân 83 | VDD_IO — I/O supply |
| Chân 84 | GND — Ground |
| Chân 85 | A_VDD — Analog supply |
| Chân 86 | A_GND — Analog ground |
| Chân 87 | A_VDD — Analog supply |
| Chân 88 | A_GND — Analog ground |
| Chân 89 | A_VDD — Analog supply |
| Chân 90 | A_GND — Analog ground |
| Chân 91 | A_VDD — Analog supply |
| Chân 92 | A_GND — Analog ground |
| Chân 93 | A_VDD — Analog supply |
| Chân 94 | A_GND — Analog ground |
| Chân 95 | A_VDD — Analog supply |
| Chân 96 | A_GND — Analog ground |
| Chân 97 | A_VDD — Analog supply |
| Chân 98 | A_GND — Analog ground |
| Chân 99 | A_VDD — Analog supply |
| Chân 100 | A_GND — Analog ground |
| Chân 101 | VDD_CORE — Core supply |
| Chân 102 | GND — Ground |
| Chân 103 | VDD_IO — I/O supply |
| Chân 104 | GND — Ground |
| Chân 105 | NC — Not connected (per datasheet) |
| Chân 106 | NC — Not connected (per datasheet) |
| Chân 107 | NC — Not connected (per datasheet) |
| Chân 108 | NC — Not connected (per datasheet) |
| Chân 109 | NC — Not connected (per datasheet) |
| Chân 110 | NC — Not connected (per datasheet) |
| Chân 111 | VDD_CORE — Core supply |
| Chân 112 | GND — Ground |
| Chân 113 | VDD_IO — I/O supply |
| Chân 114 | GND — Ground |
| Chân 115 | TEST_PHY1 — PHY1 test mode (per datasheet) |
| Chân 116 | TEST_PHY2 — PHY2 test mode (per datasheet) |
| Chân 117 | RSVD — Reserved (per datasheet) |
| Chân 118 | RSVD — Reserved (per datasheet) |
| Chân 119 | RSVD — Reserved (per datasheet) |
| Chân 120 | RSVD — Reserved (per datasheet) |
| Chân 121 | RSVD — Reserved (per datasheet) |
| Chân 122 | RSVD — Reserved (per datasheet) |
| Chân 123 | RSVD — Reserved (per datasheet) |
| Chân 124 | RSVD — Reserved (per datasheet) |
| Chân 125 | RSVD — Reserved (per datasheet) |
| Chân 126 | RSVD — Reserved (per datasheet) |
| Chân 127 | RSVD — Reserved (per datasheet) |
| Chân 128 | EP — Exposed pad - thermal/ground |
Đặc tính điện và nhiệt
| Công suất đầu vào | 3.3 V (I/O and analog); 1.8 V or 1.2 V internal core |
| Nhiệt độ hoạt động | -40C to +85C (industrial grade) |
Các thông số điện và nhiệt của LAN9313-NU được công bố bởi nhà sản xuất.
Ứng dụng tiêu biểu
LAN9313-NU phù hợp cho 7 Áp dụngs: Industrial Factory Automation Gateways, Building Automation Controllers, Networked Security and Access Control, Point-of-Sale (POS) Terminals, Automotive Infotainment Networking, Embedded Sensor and IoT Hubs, Medical Monitoring Equipment.
Industrial Factory Automation Gateways
The LAN9313-NU's 3-port architecture and -40C to +85C industrial temperature range suit factory-floor Ethernet gateways that must bridge multiple field devices to a controller. Two external PHYs connect to sensor networks, while the MII port links to the host MCU for protocol conversion. Hardware-accelerated 802.1Q VLAN and 802.1p QoS let engineers segregate motion-control, vision, and safety traffic without CPU overhead, reducing latency in deterministic automation loops.
Được đề xuất
Building Automation Controllers
In BACnet/IP and Modbus TCP building controllers, the LAN9313-NU provides a managed switch with VLAN segmentation to isolate lighting, HVAC, and security subnets on a single board. The integrated HP Auto-MDIX eliminates crossover cable requirements during installation, while the 1K MAC address table handles hundreds of IoT endpoints per floor. Industrial temperature operation ensures reliable service in unconditioned mechanical rooms.
Được đề xuất
Networked Security and Access Control
IP-based access controllers, IP cameras, and intercoms use the LAN9313-NU to provide dual Ethernet ports for daisy-chained installation plus one MII host port. The managed switch fabric supports 802.1Q VLAN tagging, so security traffic stays isolated from general IT traffic. Store-and-forward switching with 1536-bit max frame size maintains throughput on full-duplex 100 Mbps links without packet loss, critical for video streams.
Được đề xuất
Point-of-Sale (POS) Terminals
Modern POS terminals connect to store back-office networks, payment processors, and customer Wi-Fi concurrently. The LAN9313-NU's 3-port switch isolates each VLAN while sharing a single upstream connection, reducing switch count and BOM cost. The MII host bus interfaces easily with low-cost ARM Cortex-M MPUs. Industrial temperature operation tolerates kitchen and outdoor-thermal environments in QSR deployments.
Được đề xuất
Automotive Infotainment Networking
In non-safety automotive Ethernet networks, the LAN9313-NU provides rear-seat entertainment and diagnostic-port networking. Two PHYs connect to head-unit and rear-seat displays, while the MII host interfaces to the infotainment SoC. 802.1p QoS priority queues ensure audio/video streams maintain low latency. Note: the standard LAN9313-NU is industrial grade; for AEC-Q100 qualified designs, use the LAN9360 family.
Được đề xuất
Embedded Sensor and IoT Hubs
IoT edge hubs aggregate data from multiple sensor clusters over Ethernet. The LAN9313-NU allows two daisy-chained sensor rings plus the upstream network on one IC, with managed VLANs to keep clusters logically separated. The 3.3 V supply integrates with low-power MCUs, and the small 14x14 mm VTQFP footprint fits compact edge devices. The exposed pad aids thermal dissipation in always-on deployments.
Được đề xuất
Medical Monitoring Equipment
Patient monitors and diagnostic imaging systems use the LAN9313-NU to provide redundant Ethernet connectivity for safety and uptime. Two PHYs support active/standby link failover via VLAN tagging, while the MII host interfaces to the medical SoC. 802.1p QoS prioritizes alarm packets. Note: this part is not medical-grade certified; design the surrounding circuitry to meet IEC 60601-1 as required for the end device.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LAN9313-NU — 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 | LAN9303-NU | LAN9353-NU | LAN9313-NU-TR | LAN9313i-NU |
|---|---|---|---|---|---|
| Package | 128-pin VTQFP (14x14) | 128-pin VTQFP (14x14) - same | 128-pin VTQFP (14x14) - same | 128-pin VTQFP (14x14) - same | 128-pin VTQFP (14x14) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Number of Ports | 3 (managed) | 3 (unmanaged) | 3 (managed + TCP/IP offload) | 3 (managed) | 3 (managed, industrial) |
| Integrated PHYs | 2 (10/100 + Auto-MDIX) | 2 (10/100 + Auto-MDIX) | 2 (10/100 + Auto-MDIX) | 2 (10/100 + Auto-MDIX) | 2 (10/100 + Auto-MDIX) |
| Host Interface | MII (16-bit) | MII (16-bit) | MII + 16-bit host bus + TCP/IP offload | MII (16-bit) | MII (16-bit) |
| VLAN/QoS Support | 802.1Q + 802.1p | None (unmanaged) | 802.1Q + 802.1p | 802.1Q + 802.1p | 802.1Q + 802.1p |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C (industrial) |
| Approx. Unit Price (USD) | $13.42 (qty 1) | $8-10 (qty 1, unmanaged lower cost) | $15-17 (qty 1, with TCP/IP offload) | $13.42 (qty 1, T&R variant) | $13-15 (qty 1, industrial) |
Bảo phân biệt quan trọng
- Managed Layer-2 features in same 128-pin package (vsLAN9303-NU)
- On-chip dual PHY eliminates external PHY BOM (vsDiscrete PHY + MAC + switch design)
- Optional TCP/IP hardware offload on pin-compatible upgrade (vsLAN9353-NU)
Ghi chú thiết kế
Solder the LAN9313-NU's central exposed pad to a continuous ground copper pour with at least 16 thermal vias (0.3 mm drill, 0.5 mm pitch) for heat dissipation and EMI return path. Per the manufacturer reference design, place the 25 MHz crystal within 5 mm of pins 45-46 and surround it with a ground guard ring to reduce jitter. Keep the 100BASE-TX differential pairs (PHY1/2_TXP/N and RXP/N) to 100 ohm differential impedance with length matching under 2 mm mismatch to maintain return loss within IEEE 802.3 spec.
Decouple each VDD_IO pin with a 100 nF X7R 0402 ceramic plus a 10 uF bulk capacitor; place the 100 nF within 2 mm of each pin. Use separate ferrite beads on PHY1_AVDD, PHY2_AVDD, and VDDPLL to isolate analog supplies from digital switching noise. The 1.8 V (or 1.2 V) core rail must be sequenced after the 3.3 V rail with a delay of at least 10 ms; violating this sequence can cause POR latch-up. Estimated: 100 mA peak at 3.3 V under full traffic.
Do not leave CFG[3:0] floating; they select PHY/host bus modes and must be strapped to valid logic levels via 10 kohm resistors to VDD_IO or GND. A common mistake is omitting the 1.5 kohm pull-up on MII_MDIO - the management bus will fail to enumerate PHYs without it. Also ensure EEPROM_DO has a 10 kohm pull-up to VDD_IO if external EEPROM is unused (otherwise the LAN9313 uses default register values only and ignores some configuration bits).
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Lead-free (Pb-free) and halogen-free per datasheet. Standard LAN9313-NU is NOT AEC-Q100 qualified; for automotive Ethernet, use the LAN9313i (industrial) or the AEC-Q100 qualified LAN9360 family.
