IC manufacturers Microchip

IC manufacturers (108)

Microchip LAN7800 | Demoboard RD041

Design of a Single Pair Ethernet System with Power over Data Lines (SPoE)

Overview

TopologyLAN / POE
IC revision1.6

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

Parts approved by Microchip

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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)
R
Tol. R
PRated(W)
TCR(ppm/ °C)
TCR(ppm/ °C)
VE(V)
Interface Type
Gender
Pins
PCB Thickness(mm)
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
SamplesAvailability & Sample
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SPECWE-XTAL Quartz Crystal, 25 MHz, ±20ppm
Simu­lation
Availability
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Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Frequency25 MHz
Frequency±20ppm 
Stability30 ppm
Load Capacitance18 pF
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SizeCFPX-180 
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Length3.2 mm
Width2.5 mm
Height0.8 mm
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ApplicationProcessor, USB, 3G/4G/5G, Ethernet, Small Cell, PHY, PCI Express 
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Operating Temperature -40 °C up to +85 °C
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SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
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Size0805 
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Length2 mm
Width1.2 mm
Height0.9 mm
Pad Dimension0.5 mm
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Impedance @ 100 MHz300 Ω
Maximum Impedance350 Ω
Maximum Impedance200 MHz 
Rated Current 23000 mA
DC Resistance0.05 Ω
TypeHigh Current 
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Rated Current2000 mA
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Operating Temperature -55 °C up to +125 °C
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SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
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iProduction is active. Expected lifetime: >10 years.
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Size0805 
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Length2 mm
Width1.2 mm
Height0.0009 mm
Pad Dimension0.5 mm
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Impedance @ 100 MHz600 Ω
Maximum Impedance700 Ω
Maximum Impedance150 MHz 
Rated Current 22000 mA
DC Resistance0.15 Ω
TypeHigh Current 
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Rated Current1500 mA
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Operating Temperature -55 °C up to +125 °C
MountSMT 
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SPECWE-CNSW SMT Common Mode Line Filter, –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Size1206 
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Length3.2 mm
Width1.6 mm
Height1.8 mm
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Pins4 
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Impedance @ 100 MHz90 Ω
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DC Resistance0.3 Ω
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Winding Stylebifilar 
Inductance0.111 µH
Rated Current370 mA
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Rated Voltage50 V
Insulation Test Voltage125 V (DC)
ApplicationUSB 2.0 
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Operating Temperature -40 °C up to +125 °C
MountSMT 
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SPECWE-CNSW HF SMT Common Mode Line Filter, –, –
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ActiveProduction is active. Expected lifetime: >10 years.
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Size0504 
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Length1.2 mm
Width1 mm
Height0.9 mm
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Pins4 
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Impedance @ 100 MHz60 Ω
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DC Resistance0.22 Ω
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Winding Stylebifilar 
Inductance0.1 µH
Rated Current600 mA
Cut-Off Frequency10 GHz
Rated Voltage20 V
Insulation Test Voltage125 V (DC)
ApplicationUSB 3.X, HDMI 1.4 
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Operating Temperature -40 °C up to +105 °C
MountSMT 
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SPECWE-VS SMT Varistor, –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-VS SMT Varistor
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Size1206 
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Length3.2 mm
Width1.6 mm
Height1.7 mm
Pad Dimension0.5 mm
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(Reverse) Peak Pulse Current100 A
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AC Operating Voltage60 V
DC Operating Voltage85 V
Energy Absorption0.7 J
Clamping Voltage104 V
Clamping Voltage1.0 A @ 8/20 µs 
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Operating Temperature -40 °C up to +85 °C
MountSMT 
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SPECWE-LQS SMT Power Inductor, –, –
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Size3015 
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Length3 mm
Width3 mm
Height1.5 mm
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Saturation Current1.5 A
DC Resistance70 mΩ
Self Resonant Frequency72 MHz
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Inductance3.3 µH
Rated Current1500 mA
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Operating Temperature -40 °C up to +125 °C
MountSMT 
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SPECWE-LAN LAN Transformer, –, –
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iProduction is active. Expected lifetime: >10 years.
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Length12.7 mm
Width8.8 mm
Height6.35 mm
Pad Dimension8890 mm
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Pins16 
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TypeStandard 
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Inductance350 µH
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Insulation Test Voltage1500 V (DC)
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Data rate10/100BASE-TX 
Ports1 
PoEnon-PoE 
Improved Common Mode RejectionNo 
Operating Temperature 0 °C up to +70 °C
MountSMT 
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SPECWCAP-CSGP MLCCs 50 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance15 pF
Capacitance±5% 
Size0402 
Q-Factor700 
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Insulation Resistance10 GΩ
Ceramic TypeNP0 Class I 
Length1 mm
Width0.5 mm
Height0.5 mm
Pad Dimension0.25 mm
Packaging7" Tape & Reel 
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Rated Voltage50 V
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SPECWCAP-CSGP MLCCs 25 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance100 nF
Capacitance±20% 
Size0402 
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Dissipation Factor10 %
Insulation Resistance5 GΩ
Ceramic TypeX5R Class II 
Length1 mm
Width0.5 mm
Height0.5 mm
Pad Dimension0.25 mm
Packaging7" Tape & Reel 
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Rated Voltage25 V
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Operating Temperature -55 °C up to +85 °C
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SPECWCAP-CSGP MLCCs 50 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance10 pF
Capacitance±5% 
Size0603 
Q-Factor600 
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Insulation Resistance10 GΩ
Ceramic TypeNP0 Class I 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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Rated Voltage50 V
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SPECWCAP-CSGP MLCCs 16 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance1 µF
Capacitance±10% 
Size0603 
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Dissipation Factor10 %
Insulation Resistance0.1 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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Rated Voltage16 V
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Operating Temperature -55 °C up to +125 °C
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SPECWCAP-CSGP MLCCs 25 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance100 nF
Capacitance±10% 
Size0603 
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Dissipation Factor3.5 %
Insulation Resistance5 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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Rated Voltage25 V
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Operating Temperature -55 °C up to +125 °C
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SPECWCAP-CSGP MLCCs 50 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance22 nF
Capacitance±10% 
Size0603 
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Dissipation Factor2.5 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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Rated Voltage50 V
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Operating Temperature -55 °C up to +125 °C
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SPECWCAP-CSGP MLCCs 50 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance47 nF
Capacitance±10% 
Size0603 
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Dissipation Factor3 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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Rated Voltage50 V
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Operating Temperature -55 °C up to +125 °C
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SPECWCAP-CSGP MLCCs 6.3 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance10 µF
Capacitance±20% 
Size0603 
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Dissipation Factor15 %
Insulation Resistance0.005 GΩ
Ceramic TypeX5R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.35 mm
Packaging7" Tape & Reel 
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Rated Voltage6.3 V
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SPECWCAP-CSGP MLCCs 6.3 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance22 µF
Capacitance±20% 
Size0805 
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Dissipation Factor15 %
Insulation Resistance0.005 GΩ
Ceramic TypeX5R Class II 
Length2 mm
Width1.25 mm
Height1.25 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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Rated Voltage6.3 V
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Operating Temperature -55 °C up to +85 °C
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SPECWR-USB Type C Connectors, –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Insulation Resistance1000 MΩ
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PackagingTape and Reel 
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Interface TypeType C 
GenderReceptacle 
Pins24 
PCB Thickness1.6 mm
Working Voltage48 V (DC)
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TypeHorizontal 
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Rated Current5000 mA
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ApplicationUSB 3.1 
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Polarity24 
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Operating Temperature -40 °C up to +105 °C
MountTHR 
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SPECWCAP-CSGP MLCCs 100 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance10 nF
Capacitance±10% 
Size1206 
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Dissipation Factor2.5 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Length3.2 mm
Width1.6 mm
Height0.8 mm
Pad Dimension0.6 mm
Packaging7" Tape & Reel 
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Rated Voltage100 V
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SPECWCAP-CSGP MLCCs 100 V(DC), –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Capacitance1 nF
Capacitance±10% 
Size0805 
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Dissipation Factor2.5 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Length2 mm
Width1.25 mm
Height0.8 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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Rated Voltage100 V
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SPECWE-TVS TVS Diode – Super Speed Series, –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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SizeDFN1210-6L 
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Length1.2 mm
Width1 mm
Height0.45 mm
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ApplicationUSB 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 
Channels2 
PolarityUnidirectional 
Channel Operating Voltage [max.]3.3 V
Channel (Reverse) Leakage Current [max.]0.5 µA
(Reverse) Breakdown Voltage [min.]4.5 V
(Channel) Input Capacitance [typ.]0.18 pF
(Reverse) Peak Pulse Current3 A
Channel ESD Clamping Voltage [typ.]13 V
ESD Contact Discharge Capability8 kV
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DC Operating Voltage3.3 V
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Operating Temperature -55 °C up to +85 °C
MountSMT 
–Check availability
SPECWRIS-RSKS Thick Film Resistors, –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
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Size0603 
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Length1.6 mm
Width0.8 mm
Height0.45 mm
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Resistance10 kΩ
Resistance±1% 
Rated Power0.1 W
Temperature Coefficient of Resistance (min.)-100 ppm/ °C
Temperature Coefficient of Resistance (max.)100 ppm/ °C
Limiting Element Voltage75 V
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Operating Temperature -55 °C up to +155 °C
MountSMT 
–Check availability
SPECWRIS-RSKS Thick Film Resistors, –, –
Simu­lation
Availability
–
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
–
–
–
–
–
–
Size0603 
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–
–
–
Length1.6 mm
Width0.8 mm
Height0.45 mm
–
–
–
–
–
Resistance12 kΩ
Resistance±1% 
Rated Power0.1 W
Temperature Coefficient of Resistance (min.)-100 ppm/ °C
Temperature Coefficient of Resistance (max.)100 ppm/ °C
Limiting Element Voltage75 V
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–
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–
–
–
–
–
–
–
–
–
–
–
–
–
Operating Temperature -55 °C up to +155 °C
MountSMT 
–Check availability
SPECWRIS-RSKS Thick Film Resistors, –, –
Simu­lation
Availability
–
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
–
–
–
–
–
–
Size0603 
–
–
–
–
Length1.6 mm
Width0.8 mm
Height0.45 mm
–
–
–
–
–
Resistance2 kΩ
Resistance±1% 
Rated Power0.1 W
Temperature Coefficient of Resistance (min.)-100 ppm/ °C
Temperature Coefficient of Resistance (max.)100 ppm/ °C
Limiting Element Voltage75 V
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–
–
–
–
–
–
–
–
–
–
–
–
–
–
Operating Temperature -55 °C up to +155 °C
MountSMT 
–Check availability
SPECWRIS-RSKS Thick Film Resistors, –, –
Simu­lation
Availability
–
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
–
–
–
–
–
–
Size0603 
–
–
–
–
Length1.6 mm
Width0.8 mm
Height0.45 mm
–
–
–
–
–
Resistance49.9 Ω
Resistance±1% 
Rated Power0.1 W
Temperature Coefficient of Resistance (min.)-100 ppm/ °C
Temperature Coefficient of Resistance (max.)100 ppm/ °C
Limiting Element Voltage75 V
–
–
–
–
–
–
–
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–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Operating Temperature -55 °C up to +155 °C
MountSMT 
–Check availability