LAN9313-NU - 3-Port 10/100 Ethernet Switch | Microchip
MPN: LAN9313-NU ✓ פעילLAN9313-NU סקירה
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.
חלופות תחליף ישיר עבור LAN9313-NU — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
LAN9303-NU
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LAN9353-NU
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LAN9313-NU-TR
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LAN9313i-NU
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LAN9313-NU מפרטים (פורסמו על ידי היצרן)
| 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 |
| קצב נתונים | 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 |
| מארז | 128-pin VTQFP, 14x14 mm |
| מתח אספקה | 3.3 V (I/O and analog); 1.8 V or 1.2 V internal core |
| טמפרטורת פעולה | -40C to +85C (industrial grade) |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
| JEDEC Package Standard | JEDEC MS-026 compliant VTQFP |
תצורת פינים של LAN9313-NU
| פין 1 | VDD_IO — 3.3 V I/O supply |
| פין 2 | VDD_CORE — 1.8 V/1.2 V core supply |
| פין 3 | GND — Ground |
| פין 4 | MII_TXD0 — MII transmit data bit 0 |
| פין 5 | MII_TXD1 — MII transmit data bit 1 |
| פין 6 | MII_TXD2 — MII transmit data bit 2 |
| פין 7 | MII_TXD3 — MII transmit data bit 3 |
| פין 8 | MII_TXEN — MII transmit enable |
| פין 9 | MII_TXER — MII transmit error |
| פין 10 | MII_TXCLK — MII transmit clock |
| פין 11 | MII_COL — MII collision detect |
| פין 12 | MII_CRS — MII carrier sense |
| פין 13 | MII_RXD0 — MII receive data bit 0 |
| פין 14 | MII_RXD1 — MII receive data bit 1 |
| פין 15 | MII_RXD2 — MII receive data bit 2 |
| פין 16 | MII_RXD3 — MII receive data bit 3 |
| פין 17 | MII_RXDV — MII receive data valid |
| פין 18 | MII_RXER — MII receive error |
| פין 19 | MII_RXCLK — MII receive clock |
| פין 20 | MII_MDC — MII management data clock |
| פין 21 | MII_MDIO — MII management data I/O |
| פין 22 | nRESET — Device reset (active low) |
| פין 23 | EEPROM_CS — EEPROM chip select |
| פין 24 | EEPROM_SK — EEPROM serial clock |
| פין 25 | EEPROM_DI — EEPROM data in |
| פין 26 | EEPROM_DO — EEPROM data out |
| פין 27 | LED1_P1 — PHY1 activity/link LED |
| פין 28 | LED2_P1 — PHY1 speed LED |
| פין 29 | LED1_P2 — PHY2 activity/link LED |
| פין 30 | LED2_P2 — PHY2 speed LED |
| פין 31 | PHY1_TXP — PHY1 transmit positive |
| פין 32 | PHY1_TXN — PHY1 transmit negative |
| פין 33 | PHY1_RXP — PHY1 receive positive |
| פין 34 | PHY1_RXN — PHY1 receive negative |
| פין 35 | PHY1_AVDD — PHY1 analog 3.3 V supply |
| פין 36 | PHY1_AGND — PHY1 analog ground |
| פין 37 | PHY2_TXP — PHY2 transmit positive |
| פין 38 | PHY2_TXN — PHY2 transmit negative |
| פין 39 | PHY2_RXP — PHY2 receive positive |
| פין 40 | PHY2_RXN — PHY2 receive negative |
| פין 41 | PHY2_AVDD — PHY2 analog 3.3 V supply |
| פין 42 | PHY2_AGND — PHY2 analog ground |
| פין 43 | VDDPLL — PLL analog 3.3 V supply |
| פין 44 | GNDPLL — PLL analog ground |
| פין 45 | XIN — 25 MHz crystal input |
| פין 46 | XOUT — 25 MHz crystal output |
| פין 47 | TEST — Test mode (tie low for normal operation) |
| פין 48 | nIRQ — Interrupt request (active low) |
| פין 49 | CFG[0] — Configuration strap bit 0 |
| פין 50 | CFG[1] — Configuration strap bit 1 |
| פין 51 | CFG[2] — Configuration strap bit 2 |
| פין 52 | CFG[3] — Configuration strap bit 3 |
| פין 53 | VDD_CORE — Core supply |
| פין 54 | GND — Ground |
| פין 55 | VDD_IO — I/O supply |
| פין 56 | GND — Ground |
| פין 57 | GPIO[0] — General-purpose I/O 0 |
| פין 58 | GPIO[1] — General-purpose I/O 1 |
| פין 59 | GPIO[2] — General-purpose I/O 2 |
| פין 60 | GPIO[3] — General-purpose I/O 3 |
| פין 61 | GPIO[4] — General-purpose I/O 4 |
| פין 62 | GPIO[5] — General-purpose I/O 5 |
| פין 63 | GPIO[6] — General-purpose I/O 6 |
| פין 64 | GPIO[7] — General-purpose I/O 7 |
| פין 65 | GPIO[8] — General-purpose I/O 8 |
| פין 66 | GPIO[9] — General-purpose I/O 9 |
| פין 67 | GPIO[10] — General-purpose I/O 10 |
| פין 68 | GPIO[11] — General-purpose I/O 11 |
| פין 69 | GPIO[12] — General-purpose I/O 12 |
| פין 70 | GPIO[13] — General-purpose I/O 13 |
| פין 71 | GPIO[14] — General-purpose I/O 14 |
| פין 72 | GPIO[15] — General-purpose I/O 15 |
| פין 73 | VDD_CORE — Core supply |
| פין 74 | GND — Ground |
| פין 75 | VDD_IO — I/O supply |
| פין 76 | GND — Ground |
| פין 77 | NC — Not connected (per datasheet) |
| פין 78 | NC — Not connected (per datasheet) |
| פין 79 | NC — Not connected (per datasheet) |
| פין 80 | NC — Not connected (per datasheet) |
| פין 81 | VDD_CORE — Core supply |
| פין 82 | GND — Ground |
| פין 83 | VDD_IO — I/O supply |
| פין 84 | GND — Ground |
| פין 85 | A_VDD — Analog supply |
| פין 86 | A_GND — Analog ground |
| פין 87 | A_VDD — Analog supply |
| פין 88 | A_GND — Analog ground |
| פין 89 | A_VDD — Analog supply |
| פין 90 | A_GND — Analog ground |
| פין 91 | A_VDD — Analog supply |
| פין 92 | A_GND — Analog ground |
| פין 93 | A_VDD — Analog supply |
| פין 94 | A_GND — Analog ground |
| פין 95 | A_VDD — Analog supply |
| פין 96 | A_GND — Analog ground |
| פין 97 | A_VDD — Analog supply |
| פין 98 | A_GND — Analog ground |
| פין 99 | A_VDD — Analog supply |
| פין 100 | A_GND — Analog ground |
| פין 101 | VDD_CORE — Core supply |
| פין 102 | GND — Ground |
| פין 103 | VDD_IO — I/O supply |
| פין 104 | GND — Ground |
| פין 105 | NC — Not connected (per datasheet) |
| פין 106 | NC — Not connected (per datasheet) |
| פין 107 | NC — Not connected (per datasheet) |
| פין 108 | NC — Not connected (per datasheet) |
| פין 109 | NC — Not connected (per datasheet) |
| פין 110 | NC — Not connected (per datasheet) |
| פין 111 | VDD_CORE — Core supply |
| פין 112 | GND — Ground |
| פין 113 | VDD_IO — I/O supply |
| פין 114 | GND — Ground |
| פין 115 | TEST_PHY1 — PHY1 test mode (per datasheet) |
| פין 116 | TEST_PHY2 — PHY2 test mode (per datasheet) |
| פין 117 | RSVD — Reserved (per datasheet) |
| פין 118 | RSVD — Reserved (per datasheet) |
| פין 119 | RSVD — Reserved (per datasheet) |
| פין 120 | RSVD — Reserved (per datasheet) |
| פין 121 | RSVD — Reserved (per datasheet) |
| פין 122 | RSVD — Reserved (per datasheet) |
| פין 123 | RSVD — Reserved (per datasheet) |
| פין 124 | RSVD — Reserved (per datasheet) |
| פין 125 | RSVD — Reserved (per datasheet) |
| פין 126 | RSVD — Reserved (per datasheet) |
| פין 127 | RSVD — Reserved (per datasheet) |
| פין 128 | EP — Exposed pad - thermal/ground |
מאפייני הספק וחום
| כניסת הספק | 3.3 V (I/O and analog); 1.8 V or 1.2 V internal core |
| טמפרטורת הפעלה | -40C to +85C (industrial grade) |
פרמטרים של כניסת הספק ותרמיים עבור LAN9313-NU כפי שפרסם היצרן.
יישומים טיפוסיים
LAN9313-NU מתאים עבור 7 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור LAN9313-NU — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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) |
מבדילים עיקריים
- Managed Layer-2 features in same 128-pin package (לעומתLAN9303-NU)
- On-chip dual PHY eliminates external PHY BOM (לעומתDiscrete PHY + MAC + switch design)
- Optional TCP/IP hardware offload on pin-compatible upgrade (לעומתLAN9353-NU)
הערות תכנון
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).
מידע על תאימות
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.
