LAN9313-NU - 3-Port 10/100 Ethernet Switch | Microchip
N.º de pieza: LAN9313-NU ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $13.42 | $13,42 |
| 10 | $12.05 | $120,50 |
| 100 | $10.78 | $1.078,00 |
| 500 | $9.62 | $4.810,00 |
| 1.000 | $8.85 | $8.850,00 |
LAN9313-NU Descripción general
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.
Alternativas directas para LAN9313-NU — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LAN9303-NU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LAN9353-NU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LAN9313-NU-TR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LAN9313i-NU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LAN9313-NU Especificaciones (publicadas por el fabricante)
| 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 |
| Velocidad de datos | 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 |
| Encapsulado | 128-pin VTQFP, 14x14 mm |
| Tensión de alimentación | 3.3 V (I/O and analog); 1.8 V or 1.2 V internal core |
| Temperatura de funcionamiento | -40C to +85C (industrial grade) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| JEDEC Package Standard | JEDEC MS-026 compliant VTQFP |
Configuración de pines de LAN9313-NU
| Pin 1 | VDD_IO — 3.3 V I/O supply |
| Pin 2 | VDD_CORE — 1.8 V/1.2 V core supply |
| Pin 3 | GND — Ground |
| Pin 4 | MII_TXD0 — MII transmit data bit 0 |
| Pin 5 | MII_TXD1 — MII transmit data bit 1 |
| Pin 6 | MII_TXD2 — MII transmit data bit 2 |
| Pin 7 | MII_TXD3 — MII transmit data bit 3 |
| Pin 8 | MII_TXEN — MII transmit enable |
| Pin 9 | MII_TXER — MII transmit error |
| Pin 10 | MII_TXCLK — MII transmit clock |
| Pin 11 | MII_COL — MII collision detect |
| Pin 12 | MII_CRS — MII carrier sense |
| Pin 13 | MII_RXD0 — MII receive data bit 0 |
| Pin 14 | MII_RXD1 — MII receive data bit 1 |
| Pin 15 | MII_RXD2 — MII receive data bit 2 |
| Pin 16 | MII_RXD3 — MII receive data bit 3 |
| Pin 17 | MII_RXDV — MII receive data valid |
| Pin 18 | MII_RXER — MII receive error |
| Pin 19 | MII_RXCLK — MII receive clock |
| Pin 20 | MII_MDC — MII management data clock |
| Pin 21 | MII_MDIO — MII management data I/O |
| Pin 22 | nRESET — Device reset (active low) |
| Pin 23 | EEPROM_CS — EEPROM chip select |
| Pin 24 | EEPROM_SK — EEPROM serial clock |
| Pin 25 | EEPROM_DI — EEPROM data in |
| Pin 26 | EEPROM_DO — EEPROM data out |
| Pin 27 | LED1_P1 — PHY1 activity/link LED |
| Pin 28 | LED2_P1 — PHY1 speed LED |
| Pin 29 | LED1_P2 — PHY2 activity/link LED |
| Pin 30 | LED2_P2 — PHY2 speed LED |
| Pin 31 | PHY1_TXP — PHY1 transmit positive |
| Pin 32 | PHY1_TXN — PHY1 transmit negative |
| Pin 33 | PHY1_RXP — PHY1 receive positive |
| Pin 34 | PHY1_RXN — PHY1 receive negative |
| Pin 35 | PHY1_AVDD — PHY1 analog 3.3 V supply |
| Pin 36 | PHY1_AGND — PHY1 analog ground |
| Pin 37 | PHY2_TXP — PHY2 transmit positive |
| Pin 38 | PHY2_TXN — PHY2 transmit negative |
| Pin 39 | PHY2_RXP — PHY2 receive positive |
| Pin 40 | PHY2_RXN — PHY2 receive negative |
| Pin 41 | PHY2_AVDD — PHY2 analog 3.3 V supply |
| Pin 42 | PHY2_AGND — PHY2 analog ground |
| Pin 43 | VDDPLL — PLL analog 3.3 V supply |
| Pin 44 | GNDPLL — PLL analog ground |
| Pin 45 | XIN — 25 MHz crystal input |
| Pin 46 | XOUT — 25 MHz crystal output |
| Pin 47 | TEST — Test mode (tie low for normal operation) |
| Pin 48 | nIRQ — Interrupt request (active low) |
| Pin 49 | CFG[0] — Configuration strap bit 0 |
| Pin 50 | CFG[1] — Configuration strap bit 1 |
| Pin 51 | CFG[2] — Configuration strap bit 2 |
| Pin 52 | CFG[3] — Configuration strap bit 3 |
| Pin 53 | VDD_CORE — Core supply |
| Pin 54 | GND — Ground |
| Pin 55 | VDD_IO — I/O supply |
| Pin 56 | GND — Ground |
| Pin 57 | GPIO[0] — General-purpose I/O 0 |
| Pin 58 | GPIO[1] — General-purpose I/O 1 |
| Pin 59 | GPIO[2] — General-purpose I/O 2 |
| Pin 60 | GPIO[3] — General-purpose I/O 3 |
| Pin 61 | GPIO[4] — General-purpose I/O 4 |
| Pin 62 | GPIO[5] — General-purpose I/O 5 |
| Pin 63 | GPIO[6] — General-purpose I/O 6 |
| Pin 64 | GPIO[7] — General-purpose I/O 7 |
| Pin 65 | GPIO[8] — General-purpose I/O 8 |
| Pin 66 | GPIO[9] — General-purpose I/O 9 |
| Pin 67 | GPIO[10] — General-purpose I/O 10 |
| Pin 68 | GPIO[11] — General-purpose I/O 11 |
| Pin 69 | GPIO[12] — General-purpose I/O 12 |
| Pin 70 | GPIO[13] — General-purpose I/O 13 |
| Pin 71 | GPIO[14] — General-purpose I/O 14 |
| Pin 72 | GPIO[15] — General-purpose I/O 15 |
| Pin 73 | VDD_CORE — Core supply |
| Pin 74 | GND — Ground |
| Pin 75 | VDD_IO — I/O supply |
| Pin 76 | GND — Ground |
| Pin 77 | NC — Not connected (per datasheet) |
| Pin 78 | NC — Not connected (per datasheet) |
| Pin 79 | NC — Not connected (per datasheet) |
| Pin 80 | NC — Not connected (per datasheet) |
| Pin 81 | VDD_CORE — Core supply |
| Pin 82 | GND — Ground |
| Pin 83 | VDD_IO — I/O supply |
| Pin 84 | GND — Ground |
| Pin 85 | A_VDD — Analog supply |
| Pin 86 | A_GND — Analog ground |
| Pin 87 | A_VDD — Analog supply |
| Pin 88 | A_GND — Analog ground |
| Pin 89 | A_VDD — Analog supply |
| Pin 90 | A_GND — Analog ground |
| Pin 91 | A_VDD — Analog supply |
| Pin 92 | A_GND — Analog ground |
| Pin 93 | A_VDD — Analog supply |
| Pin 94 | A_GND — Analog ground |
| Pin 95 | A_VDD — Analog supply |
| Pin 96 | A_GND — Analog ground |
| Pin 97 | A_VDD — Analog supply |
| Pin 98 | A_GND — Analog ground |
| Pin 99 | A_VDD — Analog supply |
| Pin 100 | A_GND — Analog ground |
| Pin 101 | VDD_CORE — Core supply |
| Pin 102 | GND — Ground |
| Pin 103 | VDD_IO — I/O supply |
| Pin 104 | GND — Ground |
| Pin 105 | NC — Not connected (per datasheet) |
| Pin 106 | NC — Not connected (per datasheet) |
| Pin 107 | NC — Not connected (per datasheet) |
| Pin 108 | NC — Not connected (per datasheet) |
| Pin 109 | NC — Not connected (per datasheet) |
| Pin 110 | NC — Not connected (per datasheet) |
| Pin 111 | VDD_CORE — Core supply |
| Pin 112 | GND — Ground |
| Pin 113 | VDD_IO — I/O supply |
| Pin 114 | GND — Ground |
| Pin 115 | TEST_PHY1 — PHY1 test mode (per datasheet) |
| Pin 116 | TEST_PHY2 — PHY2 test mode (per datasheet) |
| Pin 117 | RSVD — Reserved (per datasheet) |
| Pin 118 | RSVD — Reserved (per datasheet) |
| Pin 119 | RSVD — Reserved (per datasheet) |
| Pin 120 | RSVD — Reserved (per datasheet) |
| Pin 121 | RSVD — Reserved (per datasheet) |
| Pin 122 | RSVD — Reserved (per datasheet) |
| Pin 123 | RSVD — Reserved (per datasheet) |
| Pin 124 | RSVD — Reserved (per datasheet) |
| Pin 125 | RSVD — Reserved (per datasheet) |
| Pin 126 | RSVD — Reserved (per datasheet) |
| Pin 127 | RSVD — Reserved (per datasheet) |
| Pin 128 | EP — Exposed pad - thermal/ground |
Características de potencia y térmicas
| Entrada de potencia | 3.3 V (I/O and analog); 1.8 V or 1.2 V internal core |
| Temperatura de funcionamiento | -40C to +85C (industrial grade) |
Parámetros de entrada de potencia y térmicos para LAN9313-NU según lo publicado por el fabricante.
Aplicaciones típicas
LAN9313-NU es adecuado para 7 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LAN9313-NU — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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) |
Diferenciadores clave
- Managed Layer-2 features in same 128-pin package (frente a LAN9303-NU)
- On-chip dual PHY eliminates external PHY BOM (frente a Discrete PHY + MAC + switch design)
- Optional TCP/IP hardware offload on pin-compatible upgrade (frente a LAN9353-NU)
Notas de diseño
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).
Información de cumplimiento
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.
