8+1 port layout
Eight copper ports run at 100M, each needing magnetics and an RJ45 jack; see our 10/100 Ethernet transformers. The ninth port is MII to the host MAC.
Ethernet Interface Chip products
JL5109 combines eight external 100M ports with one MII host uplink in a QFN88 package at 10 by 10 millimetres. It suits mid-size managed switches where the host must reach the network alongside a dense front panel.
Part number search & selector
Filter the JL5109 by ports, interface mode, MAC interface voltage, supply, temperature and package.
* Frozen Image and Part Number columns · drag horizontally to review all specifications
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
JL5109C-NC | SPEC | JL5109 series | 100M | 8+1 | MII | 3.3V | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃ | QFN88 | 10*10 mm |
|
Broaden the selected filters or clear the current search.
By port topology
Port notation such as 5+1 means five external ports plus one host uplink.
Series overview
The JL5109 Ethernet switch IC puts a host processor on an eight-port 100M network through one MII port. Counting that port, it is a 9 port Ethernet switch IC, in QFN88 at 10 × 10 mm and a commercial grade. Without a host link, see the eight-port JL5108; with a second MII port, the JL5110.
Eight copper ports run at 100M, each needing magnetics and an RJ45 jack; see our 10/100 Ethernet transformers. The ninth port is MII to the host MAC.
The MAC interface voltage is 3.3 V. Pair this switch chip with a processor whose MAC offers MII at 3.3 V; an RMII host needs the 3+1 JL5104 instead.
JL5109C-NC uses a QFN88 package at 10 × 10 mm, with the external supply listed as 3.3 V (1.1 V). Plan the MII group and port circuits around it.
JL5109C-NC is rated 0 to 70 °C for conditioned spaces. For −40 to +85 °C with a host port, the JL5106 series offers an industrial grade.
Applications
It suits processors that need network access beside a row of local ports.
With this 100M Ethernet switch IC, a building controller joins the site network through MII and wires door units, readers and sensors to eight local ports.
A store hub can run its own software on the processor while eight copper ports serve tills, printers, scales and displays.
An intercom base unit stays on the network itself and serves eight door stations or handsets.
Documents
Open the JL5109 Ethernet switch IC datasheet and check the MII pinout, power-up order and QFN88 drawing.
Showing representative available file sets. Search to find a specific SKU.
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
JL5109C-NC comes through VOOHU, an authorized JLSemi distributor, with a datasheet (PDF) in the downloads as the reference for pinout, supply rails and package.
Discuss a new design
Contact FAE for a replacement assessment.
Already have a part number? Request samples or a quote.
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. A quotation needs the part number and yearly volume, and we will confirm availability.
To move an 8+1 design from another 100M switch IC, send its part number and datasheet. Our FAE team reviews MII, register and layout differences and recommends candidates that you validate with samples before production.
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 also supports JLSemi PHYs.
FAQ
Sourcing, host link choice and design files.
Eight external ports on the panel plus one MII uplink so the host controller can join the network, typically for management, remote access or host-originated traffic. It is the configuration for a mid-size managed switch where port density and host access are both required.
The listed part carries the NC suffix, covering 0 to 70 degrees. If your product needs an industrial range, tell us the required temperature and our engineers will confirm what is currently available, rather than assuming a grade exists because other series offer one.
Both provide eight external ports with an MII uplink in a QFN88 package at 10 by 10 millimetres. JL5110 has two uplinks rather than one, which allows a host connection and a cascade to another switch at the same time. Choose on whether you need that second link.
Eight copper ports each need magnetics and a controlled impedance pair to the connector, plus the MII uplink routing to the host. Decide the panel arrangement and the device placement early, then verify link stability and emissions on a prototype board.
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, the host interface and the operating temperature range you require.
Yes. VOOHU distributes JLSemi parts as an authorized distributor, JL5109C-NC included, from prototypes to series builds. Send your forecast and we will confirm availability.
It depends on the host. The JL5109 adds an MII port so the processor joins the network; the JL5108 has eight ports, no host port and a QFN64 package at 9 × 9 mm.
Neither is listed; the datasheet (PDF) is the only file. Draw the QFN88 footprint and the 10 × 10 mm outline from its package drawing.
Engineer support
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.
Include the document revision
Temperature, isolation voltage and PoE current basis
Pin count, pitch and spacing between pin rows
To help prioritize samples and evaluation
When you need candidates and a comparison of differences
Engineering review identifies candidate parts and explains the differences.
From the selector or engineering review
Prototyping / pilot build / production
Specify sample and production timing separately
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.