Port notation
A figure such as 5+1 means five external ports plus one host uplink. A single figure such as 5 or 8 means external ports only, with no separate uplink.
Gamme de circuits d’interface Ethernet
JL5104 100M Ethernet Switch IC
JL5104 provides three external 100M ports plus one RMII host uplink in a QFN48 package at 6 by 6 millimetres. It is the smallest configuration in the range that still lets the host controller take part in the network.
Recherche et sélection de références
Trouver des références pour JL5104 100M Ethernet Switch IC
Le tableau utilise les fiches produits actuelles du site anglophone, les critères de sélection publiés et les liens vers les fichiers techniques propres à chaque référence.
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| Image | Fiche technique | Comparer | Téléchargements |
Série
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Débit de données
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Ports
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Mode d’interface
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Tension de l’interface MAC
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Tension d’alimentation externe
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Port cuivre
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Port optique
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Température
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Boîtier
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Taille
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Échantillon |
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| Image | Référence | Fiche technique | Comparer | Téléchargements | Série | Débit de données | Ports | Mode d’interface | Tension de l’interface MAC | Tension d’alimentation externe | Port cuivre | Port optique | Température | Boîtier | Taille | Échantillon |
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JL5104C-NC | SPEC | Série JL5104 | 100M | 3+1 | RMII | 3.3V | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃ | QFN48 | 6*6 mm |
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JL5104C-NI | SPEC | Série JL5104 | 100M | 3+1 | RMII | 3.3V | 3.3V(1.1V)¹ | 10 Base-T | NA | -40~85℃ | QFN48 | 6*6 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.
Comment sélectionner
Selecting an Ethernet switch IC in four steps
Topology first, then speed, then the supply rails, then package and thermals.
- 01
Decide the port topology
Count the external ports you need, then decide whether the host has to send and receive traffic. If it does, you need a device with an uplink port.
- 02
Choose 100M or gigabit
The range covers 100M and gigabit. There are no 2.5G or faster devices here, so if the design needs those speeds, say so at enquiry.
- 03
Check the supply rails
Most devices need a low voltage core rail alongside the main supply. Confirm the rails and their sequencing before the power tree is fixed.
- 04
Plan package and thermals
Packages run from QFN48 at 6 by 6 up to TQFP176 at 20 by 20 millimetres. Higher port counts concentrate more heat in one device.
Parameters
Reading switch IC specifications
Port notation and the supply requirement are the two figures most often misread.
Link speed
100M on the JL51xx series, gigabit on the JL61xx series. Every device also supports 10Base-T on copper for legacy links.
Uplink interface
MII on most devices with an uplink, RMII on the JL5104. Devices listed as NA have no dedicated host interface at all.
Supply rails
Typically a 3.3 volt main supply with a 1.1 volt core rail, or 1.1 volt alone on some gigabit parts. Missing a rail prevents the device starting.
Fibre support
1000Base-X appears on the JL6110 and on the S variants of the JL6107. Other devices in the range are copper only.
Temperature grade
NC and PC suffixes cover 0 to 70 degrees; NI and PI cover minus 40 to 85. Not every series offers both grades.
Comparer
Switch IC series side by side
Port count and uplink presence separate the series more than speed does.
Revenir au sélecteur ↑| Série | Références | Débit de données | Ports | Mode d’interface | Tension de l’interface MAC | Tension d’alimentation externe | Port cuivre | Port optique | Température | Boîtier | Taille | Action |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Série JL5104 | 2 | 100M | 3+1 | RMII | 3.3V | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃, -40~85℃ | QFN48 | 6*6 mm | Filtrer → |
| Série JL5105 | 2 | 100M | 5 | NA | NA | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃, -40~85℃ | QFN48 | 6*6 mm | Filtrer → |
| Série JL5106 | 2 | 100M | 5+1 | MII | 3.3V | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃, -40~85℃ | QFN64 | 9*9 mm | Filtrer → |
| Série JL5108 | 2 | 100M | 8 | NA | NA | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃, -40~85℃ | QFN64 | 9*9 mm | Filtrer → |
| Série JL5109 | 1 | 100M | 8+1 | MII | 3.3V | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃ | QFN88 | 10*10 mm | Filtrer → |
| Série JL5110 | 1 | 100M | 8+2 | MII | 3.3V | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃ | QFN88 | 10*10 mm | Filtrer → |
| Série JL6105 | 1 | 1G | 5 | NA | NA | 1.1V | 10 Base-T | NA | 0~70℃ | QFN88 | 10*10 mm | Filtrer → |
| Série JL6107 | 6 | 1G | 5+2 | MII | 1.8V | 1.1V, 3.3V(1.1V)¹ | 10 Base-T | NA, 1000 Base-X | 0~70℃, -40~85℃ | LQFP128 | 14*14 mm | Filtrer → |
| Série JL6108 | 1 | 1G | 8 | NA | NA | 1.1V | 10 Base-T | NA | 0~70℃ | LQFP128 | 20*14 mm | Filtrer → |
| Série JL6110 | 2 | 1G | 8+2 | MII | 3.3V | 1.1V | 10 Base-T | 1000 Base-X | 0~70℃, -40~85℃ | TQFP176 | 20*20 mm | Filtrer → |
Analyse de l’application
Where these switch ICs are used
Confirm the port topology, whether the host must manage traffic, and the environment.
Embedded devices with a few ports
- Confirm whether the host must join the network. If it does, choose a device with an uplink such as the 3+1 or 5+1 configurations.
Unmanaged port expansion
- Where the host does not need to send traffic, a device with external ports only is simpler and needs no uplink routing.
Industrial switches with fibre uplink
- Check which specific part supports 1000Base-X, then confirm the optical module and the supply rails the device needs.
Cascaded multi-device designs
- Two uplinks allow one to reach the host and one to cascade. Estimate cross-device traffic so the cascade link does not bottleneck.
Documents
Switch IC datasheets and reference designs
Datasheets carry the supply sequencing, pinout and reference schematic per device.
Affichage de jeux de fichiers disponibles représentatifs. Recherchez un SKU précis.
JL5104C-NCSérie JL5104
JL5104C-NISérie JL5104
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Présentation de la catégorie
Reading port notation and choosing the topology
Almost every selection question on switch ICs comes down to the port notation and whether the host controller needs to be on the network.
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What 5+1 actually means
The first figure is external ports facing the outside world. The figure after the plus is a host uplink, a dedicated interface for the controller on the same board. A device listed as 5 has five external ports and no uplink, so the host cannot send or receive traffic through it. That distinction eliminates half the range.
When you need an uplink
If the product only has to move traffic between its own front panel ports, a device with external ports only is simpler and cheaper to lay out. If the host has to participate, for management, for remote access or because it originates data, you need an uplink and the host must provide the matching MII or RMII interface.
The supply rails catch people out
Most devices here need more than one rail: commonly 3.3 volts for the main supply and around 1.1 volts for the core, and some gigabit parts run the core alone. Missing a rail, or sequencing them wrongly, prevents the device starting. Confirm the rails and sequence before the power tree is committed.
FAQ
Ethernet switch IC questions engineers ask
Answers cover port notation, uplinks, supply rails and fibre support.
What does 3+1 mean on this device?
Three external 100M ports facing the network, plus one dedicated RMII uplink for the host controller on the same board. The uplink is what lets the host send and receive traffic. If your design does not need the host on the network, compare the JL5105 with five external ports and no uplink.
What must the host provide?
An RMII interface at 3.3 volts, matching the device's MAC interface voltage. RMII uses a shared reference clock, so confirm the clock arrangement from the datasheet as well as the interface itself. An MII host cannot be connected to this device without changing the part.
What supply rails does it need?
A 3.3 volt main supply together with a core rail around 1.1 volts. Both rails and their sequencing are stated in the datasheet. Omitting the core rail, or bringing the rails up in the wrong order, typically prevents the device from starting at all.
Which temperature grades are available?
Two: the NC suffix covers 0 to 70 degrees and the NI suffix covers minus 40 to 85. Choose against the temperature inside the enclosure at the highest rated ambient, not the ambient the product sits in, because the board generates heat of its own.
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, the host interface and the temperature range, and a sales engineer will confirm candidates.
Assistance technique
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Comparatif de sélection de transformateurs push-pull : VOOHU WHST06Q02E0 et Würth Elektronik 750316819
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