Link speed
100M on the JL1101 and JL1111, 1G on the JL2101, JL2201, JL2308 and JL2388, and 2.5G on the JL4201. Every Ethernet PHY in the table also lists 10Base-T on the copper side for legacy links.
Ethernet Interface Chip products
Ethernet PHY Devices
The range covers 100M, 1G and 2.5G links in single-port and eight-port devices, with RMII, MII, RGMII, SGMII and QSGMII on the MAC side. Start from the interface your host controller provides, then narrow by speed, port count, fibre support and temperature grade.
Part number search & selector
Find Ethernet PHY Devices part numbers
The table uses the current English-site product records, published selection fields and part-specific technical-file links.
* Frozen Image and Part Number columns · drag horizontally to review all specifications
| Image | Datasheet | Compare | Downloads |
Series
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Data Rate
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Ports
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MAC Interface
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V（if）
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Copper Port
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Optical Port
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Mode
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Temperature
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Package
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Size
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Sample |
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| Image | Part number | Datasheet | Compare | Downloads | Series | Data Rate | Ports | MAC Interface | V（if） | Copper Port | Optical Port | Mode | Temperature | Package | Size | Sample |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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JL1101BR-NI | SPEC | JL1101 series | 100M | 1 | RMII | 1.8V | 10 Bsae-T | 100 Base-FX | RMII-COP | -40~85℃ | QFN24 | 4*4 mm |
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By series
Ethernet PHY series by speed and ports
Series are separated by link speed, port count and the MAC interface they present.
How to select
Ethernet PHY selection in four steps
Start from the MAC interface your host provides, then fix speed and port count, then fibre, then temperature grade and package.
- 01
Start from the MAC interface
List what the host controller offers the Ethernet PHY: MII, RMII, RGMII, SGMII or QSGMII. In this range that alone narrows the field: RMII points to the JL1101, MII to the JL1111, RGMII to the JL2101 or JL2201, SGMII to the JL4201.
- 02
Fix speed and port count
A 10/100 Ethernet PHY, a gigabit Ethernet PHY or the 2.5G JL4201, with one port or eight. An 8 port gigabit PHY such as the JL2308 or JL2388 aggregates its links over QSGMII, so confirm the host has that bandwidth.
- 03
Decide on fibre
100Base-FX is listed on the JL1101 and most JL1111 variants, 1000Base-X on the JL2201 and 2500Base-X on the JL4201. Check the exact Ethernet PHY part number, because fibre support can differ within a series.
- 04
Pick the temperature grade
NC parts cover 0 to 70 degrees, NI minus 40 to 85 and NE minus 40 to 105; the eight-port parts use PC and PI for the first two. Choose the PHY grade against the temperature inside the enclosure, not the room.
Parameters
Ethernet PHY specifications explained
The MAC interface and the temperature suffix decide compatibility more than speed does, so read those two columns of the PHY table first.
Port count
One port on most series, eight on the JL2308 and JL2388. An eight-port Ethernet PHY needs a host or switch with matching QSGMII lanes.
MAC interface
RMII, MII, RGMII, SGMII or QSGMII, with the interface voltage listed where it applies, 1.8 V on several single-port parts. The PHY has to match the host exactly; no setting makes two of these interfaces equivalent.
Fibre support
100Base-FX, 1000Base-X or 2500Base-X depending on part number; Ethernet PHY parts marked NA are copper only. The optical module then has to match the mode the PHY presents.
Temperature grade
Carried in the suffix: NC or PC for 0 to 70, NI or PI for minus 40 to 85, NE for minus 40 to 105 degrees. The NI, PI and NE parts are the industrial Ethernet PHY options.
Package
The single-port parts use QFN packages, from QFN24 at 4 by 4 mm on the JL1101 up to QFN48 at 6 by 6 mm; the eight-port parts use LQFP128 at 20 by 14 mm. Ethernet PHY pin count rises with port count and interface width.
Compare
Ethernet PHY series compared: 100M, gigabit and 2.5G
Speed, port count and MAC interface together define which Ethernet PHY series fits; package and temperature grade then pick the exact part number.
Return to the selector ↑| Series | Parts | Data Rate | Ports | MAC Interface | V（if） | Copper Port | Optical Port | Mode | Temperature | Package | Size | Action |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JL1101 series | 1 | 100M | 1 | RMII | 1.8V | 10 Bsae-T | 100 Base-FX | RMII-COP | -40~85℃ | QFN24 | 4*4 mm | Filter → |
| JL1111 series | 4 | 100M | 1 | MII | 1.8V | 10 Bsae-T | NA, 100 Base-FX | MII-COP | 0~70℃, -40~85℃, -40~105℃ | QFN32 | 5*5 mm, Not specified | Filter → |
| JL2101 series | 5 | 1G | 1 | RGMII | 1.8V | 10 Bsae-T | NA | RGMII-COP | 0~70℃, -40~85℃, -40~105℃ | QFN40 | 5*5 mm | Filter → |
| JL2201 series | 2 | 1G | 1 | RGMII | 1.8V | 10 Bsae-T | 1000 Base-X | RGMII-COP | 0~70℃, -40~85℃ | QFN48 | 6*6 mm | Filter → |
| JL2308 series | 2 | 1G | 8 | QSGMII | NA | 10 Bsae-T | NA | QSGMII-COP | 0~70℃, -40~85℃ | LQFP128 | 20*14 mm | Filter → |
| JL2388 series | 2 | 1G | 8 | QSGMII | NA | 10 Bsae-T | NA | QSGMII-COP | 0~70℃, -40~85℃ | LQFP128 | 20*14 mm | Filter → |
| JL4201 series | 2 | 2.5G | 1 | SGMII | NA | 10 Bsae-T | 2500 Base-X | (H)SGMII-COP | 0~70℃, -40~85℃ | QFN48 | 6*6 mm | Filter → |
Application review
Ethernet PHY applications: industrial, EtherCAT, multi-port and fibre
Confirm the host interface, the link speed, the fibre requirement and the environment the board runs in before fixing the Ethernet PHY.
Industrial Ethernet PHY for controllers and gateways
- Confirm the host MAC interface before choosing the Ethernet PHY
- Choose the NI or NE grade to suit the cabinet temperature
- Check that the magnetics and RJ45 jack are rated for the same environment
Ethernet PHY for EtherCAT and fieldbus devices
- The JL1111BI-NI is the EtherCAT PHY variant in this range, on MII
- It is listed without fibre support, unlike the other JL1111 parts
- Confirm the protocol requirement and MII timing before committing to the EtherCAT PHY
Gigabit Ethernet PHY on multi-port switch boards
- The JL2308 and JL2388 aggregate eight gigabit ports over QSGMII
- Verify the switch or SoC provides QSGMII lanes that match the QSGMII PHY
- Route the serial lanes with controlled impedance
Ethernet PHY for fibre uplinks and media converters
- Pick the part by fibre mode: 100Base-FX, 1000Base-X or 2500Base-X
- Confirm that the optical module matches that mode
- Check that the temperature grade covers the enclosure
Documents
Ethernet PHY datasheet downloads
Each Ethernet PHY datasheet carries the pinout, the reference schematic and the layout guidance for its series.
Showing representative available file sets. Search to find a specific SKU.
JL1101BR-NIJL1101 series
JL1111BI-NI(EtherCAT)JL1111 series
JL1111B -NEJL1111 series
JL1111B -NIJL1111 series
JL1111B -NCJL1111 series
JL2101C-NCJL2101 series
- 18
- PDF datasheets listed
- 0
- 3D file sets listed
- 0
- PCB footprints listed
VOOHU’s published product content is reviewed by its engineering team. Specifications, downloads and technical support information are tied to specific part numbers, so you can verify them before requesting samples or a quotation.
Category overview
Choosing an Ethernet PHY: interface before speed
An Ethernet PHY, or physical layer transceiver, converts the digital interface of the MAC into the signalling on the cable. The most common selection error is starting from link speed; the MAC interface is the constraint that cannot be worked around.
The MAC interface decides compatibility
RMII, MII, RGMII, SGMII and QSGMII are different electrical and timing arrangements, not tiers of the same thing. A host that provides RGMII cannot drive an RMII PHY, and no software setting bridges them. Establish what your controller offers first, because it eliminates most of the range before speed is even considered.
In this range the match is direct. The JL1101 is the RMII PHY, the JL1111 uses MII, the JL2101 and JL2201 are the RGMII PHY options, the JL4201 is an SGMII PHY whose (H)SGMII mode carries its 2.5G links, and the JL2308 and JL2388 are QSGMII PHY parts. Separately from the data path, the host normally configures the PHY over the two-wire MDIO and MDC management interface, so plan those pins as well.
Copper, fibre, or both
Every Ethernet PHY in the table supports copper, including 10Base-T, and a copper link settles speed and duplex with the far end through auto-negotiation. Fibre is selective: 100Base-FX appears on the JL1101 and most JL1111 variants, 1000Base-X on the JL2201 and 2500Base-X on the JL4201. Fibre support is stated per part number rather than per series.
On the copper side the Ethernet transceiver never drives the cable directly. Between its line pins and the RJ45 sit the magnetics, either a discrete LAN transformer or an RJ45 jack with integrated magnetics, which provide isolation and common mode rejection. VOOHU manufactures LAN transformers and RJ45 jacks in its own factories, magnetics in Mianyang and connectors in Dongguan, and can suggest parts that match the speed and port count of the PHY.
Temperature grade, features and power
The letters after the base number carry the temperature rating: NC covers 0 to 70 degrees, NI minus 40 to 85 and NE minus 40 to 105, while the eight-port parts use PC and PI. Select against the temperature inside the enclosure at the highest rated ambient, not against room temperature. An industrial grade Ethernet PHY is not automatically automotive-qualified; AEC-Q100 qualification is a separate matter.
Features vary more than the table shows. If the design needs Energy Efficient Ethernet (EEE, IEEE 802.3az), Wake-on-LAN, SyncE or IEEE 1588 timestamping, confirm support in the datasheet of the exact part. The same applies when you need a low power Ethernet PHY: compare the supply current figures across datasheets rather than assuming from the speed class.
FAQ
Ethernet PHY questions from hardware design reviews
Answers cover interface choice, naming, fibre support, temperature suffixes, EtherCAT and how to request parts.
Which MAC interface should I choose?
Whichever your host controller provides. RMII, MII, RGMII, SGMII and QSGMII are different electrical and timing schemes, not performance tiers. A host with RGMII cannot drive an RMII device and no software setting bridges them. Confirm the controller's interface first, then filter the Ethernet PHY range on it.
What speeds does this range cover?
The 100M Ethernet PHY parts are the JL1101 and JL1111. The gigabit Ethernet PHY parts are the JL2101, JL2201, JL2308 and JL2388, and the JL4201 is the 2.5G Ethernet PHY. All list 10Base-T on copper. There are no 5G or 10G PHY devices in this range; if you need those speeds, tell us and we will check what is available.
Is an Ethernet PHY the same as an Ethernet transceiver?
Yes. Both names describe the device that turns the MAC's digital interface into line signalling. Datasheets also say PHY transceiver or Ethernet PHY IC, and buyers often just ask for a PHY chip. The looser term Ethernet chip can also mean a switch IC or a controller with a built-in MAC, so check which function the request needs.
Which parts support fibre?
100Base-FX appears on the JL1101 and on the JL1111 variants other than the EtherCAT one. 1000Base-X is supported on the JL2201 and 2500Base-X on the JL4201. The other series are copper only. Fibre support on an Ethernet PHY is defined per part number, so check the exact suffix rather than assuming it applies across a series.
What do the NC, NI, NE, PC and PI suffixes mean?
They carry the temperature grade of the Ethernet PHY. NC and PC are 0 to 70 degrees, NI and PI are minus 40 to 85, and NE is minus 40 to 105. Choose against the temperature inside your enclosure at the highest rated ambient, allowing for the heat the board itself generates, not against room temperature.
Is there an EtherCAT option?
Yes. The JL1111 series includes a variant identified as EtherCAT in the part number, JL1111BI-NI, which uses MII and is listed without fibre support. If your design needs an Ethernet PHY for EtherCAT, specify it at enquiry so the right variant is quoted.
How does an 8 port gigabit PHY connect to the host?
The JL2308 and JL2388 aggregate all eight links to the host over QSGMII, a serial interface that combines four SGMII links on one serial lane; the datasheet gives the lane count for the eight ports. The host must provide QSGMII and enough bandwidth for the aggregate traffic, and the layout has to carry those serial lanes with controlled impedance.
Where do I get the Ethernet PHY datasheet, a reference design or samples?
Each part number links its datasheet, whose reference schematic is the starting point for an Ethernet PHY reference design; our FAE team can help check the magnetics and RJ45 side of that design. VOOHU is an authorized distributor for the JLSemi PHY devices on this page. For samples or a quote, send the part number, quantity and the date you need it, or the host controller, speed, port count and temperature range if you are still selecting. Samples are available for evaluation, and selected parts are free of charge. Our FAE team will be glad to confirm the options for your project.
Engineer support
Continue after product selection
Send the candidate part number and the condition you need reviewed. Sample support can be added after the selection is clear; commercial questions may be discussed in the same engineering conversation.
- 1Selected part numbers
- 2Engineering review
- 3Sample request
- 4Commercial discussion
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