Eight ports, no host link
All eight ports run at 100M over copper and forward traffic among themselves. Interface mode and MAC voltage are listed as NA, so no MII or RMII bus needs routing.
Ethernet Interface Chip products
JL5108 100M Ethernet Switch IC
JL5108 provides eight external 100M ports with no host uplink, in a QFN64 package at 9 by 9 millimetres. It suits designs needing higher port density where the host controller stays off the network.
Part number search & selector
Find JL5108 100M Ethernet Switch IC part numbers
Filter JL5108 parts by data rate, ports, supply voltage, operating temperature, package and body size.
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| Image | Part number | Datasheet | Compare | Downloads | Series | Data Rate | Ports | Interface Mode | MAC interface voltage | External supply voltage | Copper Port | Optical Port | Temperature | Package | Size | Sample |
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JL5108C-NC | SPEC | JL5108 series | 100M | 8 | NA | NA | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃ | QFN64 | 9*9 mm |
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JL5108C-NI | SPEC | JL5108 series | 100M | 8 | NA | NA | 3.3V(1.1V)¹ | 10 Base-T | NA | -40~85℃ | QFN64 | 9*9 mm |
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By port topology
Switch ICs by port count and uplink
Port notation such as 5+1 means five external ports plus one host uplink.
Series overview
Planning a JL5108 Ethernet switch IC design
The JL5108 Ethernet switch IC switches eight 100M copper ports among themselves, with no MAC interface for a host processor. That makes it an 8 port switch chip for unmanaged switches and for equipment that fans one link out to many devices. It comes in QFN64 at 9 × 9 mm, in commercial and industrial grades. For eight ports plus a host link, see the JL5109 with MII; for gigabit, the JL6108.
Compact QFN64 body
JL5108C-NC and JL5108C-NI use a QFN64 package at 9 × 9 mm, a small body for an 8 port Ethernet switch IC. Most board area goes to the port circuits, since each RJ45 port needs its own magnetics; see our 10/100 Ethernet transformers.
Supply rails
The external supply is listed as 3.3 V (1.1 V). Confirm in the datasheet how the 1.1 V core is provided before you size the regulators for an eight-port board.
Temperature grades
JL5108C-NC is rated 0 to 70 °C for office and home switches. JL5108C-NI covers −40 to +85 °C for switches in control cabinets and equipment rooms without climate control.
Applications
Products built on the JL5108 Ethernet switch IC
It fits wherever many 100M devices share a link and no processor needs its own port.
Eight-port desktop switches
An 8 port switch for desks or small racks in offices, shops and classrooms: one port to the router, seven to PCs, printers, phones and tills.
Camera and recorder cabinets
Small security cabinets can link 100M cameras, a recorder and the site uplink on one switch board inside the enclosure.
Machine networks
Inside a machine cabinet, JL5108C-NI serves as an industrial Ethernet switch IC rated −40 to +85 °C, connecting drives, I/O stations, an HMI and a service port.
Documents
JL5108 Ethernet switch IC datasheet downloads
Search by part number for the JL5108 Ethernet switch IC datasheet, then check the QFN64 drawing, supply rails and port circuit.
Showing representative available file sets. Search to find a specific SKU.
JL5108C-NCJL5108 series
JL5108C-NIJL5108 series
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- PDF datasheets listed
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- 3D file sets listed
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- 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.
Sourcing
Getting JL5108 Ethernet switch ICs from VOOHU
VOOHU supplies the JL5108 as an authorized JLSemi distributor. A datasheet (PDF) is listed for each part number in the downloads below, the reference for footprint, supply and port circuits.
Discuss a new design
Contact FAE for a replacement assessment.
Already have a part number? Request samples or a quote.
Samples for your build
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. Quotations need the part number and quantity, and we will confirm availability.
Changing from another switch IC
When an existing eight-port design needs an alternative switch IC, send the current part number and datasheet. Our FAE team reviews interface, register and layout differences, then lists JL5108 candidates for sample testing before production.
Quality
VOOHU is ISO 9001 and ISO 14001 certified. Since 2018 VOOHU has supplied more than 1,500 customers, including 150+ listed companies. Our FAE team can review JLSemi switch designs before samples are sent.
FAQ
More questions about the JL5108 Ethernet switch IC
Production supply, PoE designs and footprints.
When is eight ports with no uplink the right choice?
When the product needs a relatively high port count on the panel and the host controller has no reason to join the network. It keeps the design simple, with no uplink interface to route or configure. If management or host traffic is required, compare the 8+1 or 8+2 configurations.
What does eight ports demand from the layout?
Each copper port needs its own magnetics and a controlled impedance differential pair to the connector, so board area grows quickly. Plan the panel arrangement and the magnetics placement before placing the device, and keep the pairs matched in length and spacing.
Does higher port count mean more heat?
Generally yes, because more active ports means more power in one package. Follow the datasheet thermal pad guidance, provide adequate copper and via stitching, and measure the case temperature at full load in the real enclosure at the highest rated ambient.
How does it compare with JL5109?
Both provide eight external ports. JL5108 has no uplink and comes in QFN64 at 9 by 9 millimetres. JL5109 adds an MII host uplink in a larger QFN88 at 10 by 10. The decision is whether the host needs to be on the network.
How do I request samples or a quote?
With a complete part number, send the part number, quantity, delivery region and the date you need it. If you are still selecting, send the external port count and confirm whether the host needs to be on the network.
Can I buy JL5108 Ethernet switch ICs for production through VOOHU?
Yes. JL5108C-NC and JL5108C-NI are supplied by VOOHU as an authorized JLSemi distributor. Send your annual forecast and target grade, and we will confirm availability and arrange samples for the build.
Can the JL5108 be used in a PoE switch?
For the data path, yes, but the selector lists no PoE function: power delivery needs a separate PSE controller and PoE-rated magnetics. Our article on multi-port PoE switch design covers the port side.
Can I get a PCB footprint for the JL5108?
Not as a download: the selector lists the datasheet (PDF) only. Build the QFN64 land pattern and the 9 × 9 mm outline from its package drawing, and match the pin-1 marking shown there.
Engineer support
Request JL5108 Ethernet switch IC samples
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
For a replacement review
- Original part and datasheet
Include the document revision
- Operating conditions
Temperature, isolation voltage and PoE current basis
- Package constraints
Pin count, pitch and spacing between pin rows
- Project stage and annual volume
To help prioritize samples and evaluation
- Target review date
When you need candidates and a comparison of differences
Engineering review identifies candidate parts and explains the differences.
For samples and a quotation
- Candidate part numbers
From the selector or engineering review
- Quantity and project stage
Prototyping / pilot build / production
- Required delivery date
Specify sample and production timing separately
- Required documentation
Compliance documents, material declarations or third-party reports
Samples are free of charge. Sample quantity and lead time depend on the part number and project stage. Sales will respond on business days.
