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Microchip LAN7800 | Demoboard RD041
Design of a Single Pair Ethernet System with Power over Data Lines (SPoE)
Overview
| Topology | LAN / POE |
| IC revision | 1.6 |
Description
This reference design note describes a system that cantransmit data between two points via a two-wire line. Themain unit supplies the peripheral unit with power via thesame two-wire line over which the data is transmitted. Thismethod is called "Single Pair Ethernet" with "Power over DataLines".
Features
Supports multiple power levels of Power overEthernet Detecting and classifying the PD, sourcing the rightamount of power to the PD PoDL class 12 up to 30 V / 8.3 W USB 3.1 port (no power) 10 / 100 Mbit/s Ethernet port 10 Mbit/s SPE port Data transfer between USB 3.1 and 10 / 100 Mbit/sEthernet Data transfer between USB 3.1 and SPE (10 Mbit/s) Data transfer between SPE (10 Mbit/s) and10 / 100 Mbit/s Ethernet
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | f | Tol. f | Stability (ppm) | Cload (pF) | C | Tol. C | Size | Q (%) | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | ISAT (A) | RDC (mΩ) | fres (MHz) | Interface Type | Gender | Pins (pcs) | IR (mA) | Working Voltage (V (DC)) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | Winding Style | L (µH) | IR (mA) | fc (GHz) | VR (V) | VT (V (DC)) | Application | Channels | Polarity | VCh max. (V) | ICh Leak max. (µA) | VBR min. (V) | CCh typ. (pF) | IPeak (A) | VCh Clamp ESD typ. (V) | VESD Contact (kV) | VRMS (V) | VDC (V) | Wmax (J) | VClamp (V) | Test Condition VClamp | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 830055299 | SPEC | 5 files | Active i| Production is active. Expected lifetime: >10 years. | WE-XTAL Quartz Crystal | 25 MHz | ±20ppm | 30 | 18 | – | – | CFPX-180 | – | – | – | – | 3.2 | 2.5 | 0.8 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Processor, USB, 3G/4G/5G, Ethernet, Small Cell, PHY, PCI Express | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +85 °C | SMT | ||
 | 742792031 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | 0805 | – | – | – | – | 2 | 1.2 | 0.9 | 0.5 | – | – | – | – | – | – | – | 3000 | – | 300 | 350 | 200 MHz | 3000 | 0.05 | High Current | – | – | 2000 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | SMT | ||
| 742792040 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | 0805 | – | – | – | – | 2 | 1.2 | 0.0009 | 0.5 | – | – | – | – | – | – | – | 2000 | – | 600 | 700 | 150 MHz | 2000 | 0.15 | High Current | – | – | 1500 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | SMT | ||
 | 744232090 | – | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CNSW SMT Common Mode Line Filter | – | – | – | – | – | – | 1206 | – | – | – | – | 3.2 | 1.6 | 1.8 | – | – | – | – | – | – | – | 4 | – | – | 90 | – | – | – | 0.3 | – | bifiliar | 0.111 | 370 | – | 50 | 125 | USB 2.0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | SMT | ||
 | 7442335600 | SPEC | 11 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CNSW HF SMT Common Mode Line Filter | – | – | – | – | – | – | 0504 | – | – | – | – | 1.2 | 1 | 0.9 | – | – | – | – | – | – | – | 4 | – | – | 60 | – | – | – | 0.22 | – | bifilar | 0.1 | 600 | 10 | 20 | 125 | USB 3.X, HDMI 1.4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | SMT | ||
 | 82551600 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-VS SMT Varistor | – | – | – | – | – | – | 1206 | – | – | – | – | 3.2 | 1.6 | 1.7 | 0.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 100 | – | 100 | – | – | 60 | 85 | 0.6 | 165 | 1.0 A @ 8/20 µs | – | – | – | – | -40 °C up to +85 °C | SMT | ||
 | 74404032033 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LQS SMT Power Inductor | – | – | – | – | – | – | 3015 | – | – | – | – | 3 | 3 | 1.5 | – | – | 1.5 | 70 | 72 | – | – | – | – | – | – | – | – | – | – | – | – | 3.3 | 1500 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | SMT | ||
 | 7490100110A | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LAN LAN Transformer | – | – | – | – | – | – | – | – | – | – | – | 12.7 | 8.8 | 6.35 | 8890 | – | – | – | – | – | – | 16 | – | – | – | – | – | – | – | Standard | – | 350 | – | – | – | 1500 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 10/100BASE-TX | 1 | non-PoE | No | 0 °C up to +70 °C | SMT | ||
 | 885012005056 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | 15 pF | ±5% | 0402 | 700 | – | 10 GΩ | NP0 Class I | 1 | 0.5 | 0.5 | 0.25 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | ||
| 885012105018 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | 100 nF | ±20% | 0402 | – | 10 | 5 GΩ | X5R Class II | 1 | 0.5 | 0.5 | 0.25 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 25 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +85 °C | – | ||
| 885012006051 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | 10 pF | ±5% | 0603 | 600 | – | 10 GΩ | NP0 Class I | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | ||
| 885012206052 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 16 V(DC) | – | – | – | – | 1 µF | ±10% | 0603 | – | 10 | 0.1 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 16 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | ||
| 885012206071 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | 100 nF | ±10% | 0603 | – | 3.5 | 5 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 25 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | ||
| 885012206091 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | 22 nF | ±10% | 0603 | – | 2.5 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | ||
| 885012206093 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | 47 nF | ±10% | 0603 | – | 3 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | ||
| 885012106006 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 6.3 V(DC) | – | – | – | – | 10 µF | ±20% | 0603 | – | 15 | 0.005 GΩ | X5R Class II | 1.6 | 0.8 | 0.8 | 0.35 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 6.3 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +85 °C | – | ||
| 885012107005 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 6.3 V(DC) | – | – | – | – | 22 µF | ±20% | 0805 | – | 15 | 0.005 GΩ | X5R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 6.3 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +85 °C | – | ||
 | 632723300011 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-COM USB 3.1 Type C Receptacle Horizontal THR / SMT | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | – | – | – | – | Tape and Reel | – | – | – | Type C | Receptacle | 24 | – | 20 | – | – | – | – | – | Horizontal | – | – | 5000 | – | – | – | USB 3.1 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | THR | |
| 885012208112 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 100 V(DC) | – | – | – | – | 10 nF | ±10% | 1206 | – | 2.5 | 10 GΩ | X7R Class II | 3.2 | 1.6 | 0.8 | 0.6 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 100 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | ||
| 885012207116 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 100 V(DC) | – | – | – | – | 1 nF | ±10% | 0805 | – | 2.5 | 10 GΩ | X7R Class II | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 100 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | ||
 | 824012823 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-TVS TVS Diode – Super Speed Series | – | – | – | – | – | – | DFN1210-6L | – | – | – | – | 1.2 | 1 | 0.45 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | USB 3.1 Gen1&2 (5Gb/s, 10Gb/s), USB 3.1 Type C, Display Port (1.1, 1.2, 1.3, 1.4), HDMI 2.0 | 2 | Unidirectional | 3.3 | 0.5 | 4.5 | 0.18 | 3 | 13 | 8 | – | 3.3 | – | – | – | – | – | – | – | -55 °C up to +85 °C | SMT |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 830055299 | SPEC | |
| 742792031 | SPEC | |
| 742792040 | SPEC | |
| 744232090 | – | |
| 7442335600 | SPEC | |
| 82551600 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 74404032033 | SPEC | |
| 7490100110A | SPEC | |
| 885012005056 | SPEC | |
| 885012105018 | SPEC | |
| 885012006051 | SPEC | |
| 885012206052 | SPEC | |
| 885012206071 | SPEC | |
| 885012206091 | SPEC | |
| 885012206093 | SPEC | |
| 885012106006 | SPEC | |
| 885012107005 | SPEC | |
| 632723300011 | SPEC | – |
| 885012208112 | SPEC | |
| 885012207116 | SPEC | |
| 824012823 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | f | Tol. f | Stability (ppm) | Cload (pF) | C | Tol. C | Size | Q (%) | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | ISAT (A) | RDC (mΩ) | fres (MHz) | Interface Type | Gender | Pins (pcs) | IR (mA) | Working Voltage (V (DC)) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | Winding Style | L (µH) | IR (mA) | fc (GHz) | VR (V) | VT (V (DC)) | Application | Channels | Polarity | VCh max. (V) | ICh Leak max. (µA) | VBR min. (V) | CCh typ. (pF) | IPeak (A) | VCh Clamp ESD typ. (V) | VESD Contact (kV) | VRMS (V) | VDC (V) | Wmax (J) | VClamp (V) | Test Condition VClamp | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | Mount | Samples |
|---|
