LAN9313-NU - 3-Port 10/100 Ethernet Switch | Microchip
N.º da peça: LAN9313-NU ✓ Ativo| Qtd. | Preço unitário | 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 Visão geral
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 drop-in para LAN9313-NU — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
LAN9303-NU
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LAN9353-NU
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LAN9313-NU-TR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LAN9313i-NU
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LAN9313-NU Especificações (publicadas pelo 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 |
| Taxa de dados | 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 |
| Encapsulamento | 128-pin VTQFP, 14x14 mm |
| Tensão de alimentação | 3.3 V (I/O and analog); 1.8 V or 1.2 V internal core |
| Temperatura de operação | -40C to +85C (industrial grade) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| JEDEC Package Standard | JEDEC MS-026 compliant VTQFP |
Configuração de pinos do LAN9313-NU
| Pino 1 | VDD_IO — 3.3 V I/O supply |
| Pino 2 | VDD_CORE — 1.8 V/1.2 V core supply |
| Pino 3 | GND — Ground |
| Pino 4 | MII_TXD0 — MII transmit data bit 0 |
| Pino 5 | MII_TXD1 — MII transmit data bit 1 |
| Pino 6 | MII_TXD2 — MII transmit data bit 2 |
| Pino 7 | MII_TXD3 — MII transmit data bit 3 |
| Pino 8 | MII_TXEN — MII transmit enable |
| Pino 9 | MII_TXER — MII transmit error |
| Pino 10 | MII_TXCLK — MII transmit clock |
| Pino 11 | MII_COL — MII collision detect |
| Pino 12 | MII_CRS — MII carrier sense |
| Pino 13 | MII_RXD0 — MII receive data bit 0 |
| Pino 14 | MII_RXD1 — MII receive data bit 1 |
| Pino 15 | MII_RXD2 — MII receive data bit 2 |
| Pino 16 | MII_RXD3 — MII receive data bit 3 |
| Pino 17 | MII_RXDV — MII receive data valid |
| Pino 18 | MII_RXER — MII receive error |
| Pino 19 | MII_RXCLK — MII receive clock |
| Pino 20 | MII_MDC — MII management data clock |
| Pino 21 | MII_MDIO — MII management data I/O |
| Pino 22 | nRESET — Device reset (active low) |
| Pino 23 | EEPROM_CS — EEPROM chip select |
| Pino 24 | EEPROM_SK — EEPROM serial clock |
| Pino 25 | EEPROM_DI — EEPROM data in |
| Pino 26 | EEPROM_DO — EEPROM data out |
| Pino 27 | LED1_P1 — PHY1 activity/link LED |
| Pino 28 | LED2_P1 — PHY1 speed LED |
| Pino 29 | LED1_P2 — PHY2 activity/link LED |
| Pino 30 | LED2_P2 — PHY2 speed LED |
| Pino 31 | PHY1_TXP — PHY1 transmit positive |
| Pino 32 | PHY1_TXN — PHY1 transmit negative |
| Pino 33 | PHY1_RXP — PHY1 receive positive |
| Pino 34 | PHY1_RXN — PHY1 receive negative |
| Pino 35 | PHY1_AVDD — PHY1 analog 3.3 V supply |
| Pino 36 | PHY1_AGND — PHY1 analog ground |
| Pino 37 | PHY2_TXP — PHY2 transmit positive |
| Pino 38 | PHY2_TXN — PHY2 transmit negative |
| Pino 39 | PHY2_RXP — PHY2 receive positive |
| Pino 40 | PHY2_RXN — PHY2 receive negative |
| Pino 41 | PHY2_AVDD — PHY2 analog 3.3 V supply |
| Pino 42 | PHY2_AGND — PHY2 analog ground |
| Pino 43 | VDDPLL — PLL analog 3.3 V supply |
| Pino 44 | GNDPLL — PLL analog ground |
| Pino 45 | XIN — 25 MHz crystal input |
| Pino 46 | XOUT — 25 MHz crystal output |
| Pino 47 | TEST — Test mode (tie low for normal operation) |
| Pino 48 | nIRQ — Interrupt request (active low) |
| Pino 49 | CFG[0] — Configuration strap bit 0 |
| Pino 50 | CFG[1] — Configuration strap bit 1 |
| Pino 51 | CFG[2] — Configuration strap bit 2 |
| Pino 52 | CFG[3] — Configuration strap bit 3 |
| Pino 53 | VDD_CORE — Core supply |
| Pino 54 | GND — Ground |
| Pino 55 | VDD_IO — I/O supply |
| Pino 56 | GND — Ground |
| Pino 57 | GPIO[0] — General-purpose I/O 0 |
| Pino 58 | GPIO[1] — General-purpose I/O 1 |
| Pino 59 | GPIO[2] — General-purpose I/O 2 |
| Pino 60 | GPIO[3] — General-purpose I/O 3 |
| Pino 61 | GPIO[4] — General-purpose I/O 4 |
| Pino 62 | GPIO[5] — General-purpose I/O 5 |
| Pino 63 | GPIO[6] — General-purpose I/O 6 |
| Pino 64 | GPIO[7] — General-purpose I/O 7 |
| Pino 65 | GPIO[8] — General-purpose I/O 8 |
| Pino 66 | GPIO[9] — General-purpose I/O 9 |
| Pino 67 | GPIO[10] — General-purpose I/O 10 |
| Pino 68 | GPIO[11] — General-purpose I/O 11 |
| Pino 69 | GPIO[12] — General-purpose I/O 12 |
| Pino 70 | GPIO[13] — General-purpose I/O 13 |
| Pino 71 | GPIO[14] — General-purpose I/O 14 |
| Pino 72 | GPIO[15] — General-purpose I/O 15 |
| Pino 73 | VDD_CORE — Core supply |
| Pino 74 | GND — Ground |
| Pino 75 | VDD_IO — I/O supply |
| Pino 76 | GND — Ground |
| Pino 77 | NC — Not connected (per datasheet) |
| Pino 78 | NC — Not connected (per datasheet) |
| Pino 79 | NC — Not connected (per datasheet) |
| Pino 80 | NC — Not connected (per datasheet) |
| Pino 81 | VDD_CORE — Core supply |
| Pino 82 | GND — Ground |
| Pino 83 | VDD_IO — I/O supply |
| Pino 84 | GND — Ground |
| Pino 85 | A_VDD — Analog supply |
| Pino 86 | A_GND — Analog ground |
| Pino 87 | A_VDD — Analog supply |
| Pino 88 | A_GND — Analog ground |
| Pino 89 | A_VDD — Analog supply |
| Pino 90 | A_GND — Analog ground |
| Pino 91 | A_VDD — Analog supply |
| Pino 92 | A_GND — Analog ground |
| Pino 93 | A_VDD — Analog supply |
| Pino 94 | A_GND — Analog ground |
| Pino 95 | A_VDD — Analog supply |
| Pino 96 | A_GND — Analog ground |
| Pino 97 | A_VDD — Analog supply |
| Pino 98 | A_GND — Analog ground |
| Pino 99 | A_VDD — Analog supply |
| Pino 100 | A_GND — Analog ground |
| Pino 101 | VDD_CORE — Core supply |
| Pino 102 | GND — Ground |
| Pino 103 | VDD_IO — I/O supply |
| Pino 104 | GND — Ground |
| Pino 105 | NC — Not connected (per datasheet) |
| Pino 106 | NC — Not connected (per datasheet) |
| Pino 107 | NC — Not connected (per datasheet) |
| Pino 108 | NC — Not connected (per datasheet) |
| Pino 109 | NC — Not connected (per datasheet) |
| Pino 110 | NC — Not connected (per datasheet) |
| Pino 111 | VDD_CORE — Core supply |
| Pino 112 | GND — Ground |
| Pino 113 | VDD_IO — I/O supply |
| Pino 114 | GND — Ground |
| Pino 115 | TEST_PHY1 — PHY1 test mode (per datasheet) |
| Pino 116 | TEST_PHY2 — PHY2 test mode (per datasheet) |
| Pino 117 | RSVD — Reserved (per datasheet) |
| Pino 118 | RSVD — Reserved (per datasheet) |
| Pino 119 | RSVD — Reserved (per datasheet) |
| Pino 120 | RSVD — Reserved (per datasheet) |
| Pino 121 | RSVD — Reserved (per datasheet) |
| Pino 122 | RSVD — Reserved (per datasheet) |
| Pino 123 | RSVD — Reserved (per datasheet) |
| Pino 124 | RSVD — Reserved (per datasheet) |
| Pino 125 | RSVD — Reserved (per datasheet) |
| Pino 126 | RSVD — Reserved (per datasheet) |
| Pino 127 | RSVD — Reserved (per datasheet) |
| Pino 128 | EP — Exposed pad - thermal/ground |
Características de potência e térmicas
| Entrada de Potência | 3.3 V (I/O and analog); 1.8 V or 1.2 V internal core |
| Temperatura de Funcionamento | -40C to +85C (industrial grade) |
Parâmetros de entrada de potência e térmicos para LAN9313-NU, conforme publicados pelo fabricante.
Aplicações típicas
LAN9313-NU é adequado para 7 aplicaçãos: 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
Resumo dos produtos recomendados
Dados de referência de engenharia para LAN9313-NU — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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) |
Principais diferenciais
- Managed Layer-2 features in same 128-pin package (vs LAN9303-NU)
- On-chip dual PHY eliminates external PHY BOM (vs Discrete PHY + MAC + switch design)
- Optional TCP/IP hardware offload on pin-compatible upgrade (vs LAN9353-NU)
Notas de projeto
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).
Informações de conformidade
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.
