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
JL5105 100M Ethernet Switch IC
JL5105 provides five external 100M ports with no dedicated host uplink, in a QFN48 package at 6 by 6 millimetres. It suits pure port expansion where the host controller does not need to be on the network.
Recherche et sélection de références
Trouver des références pour JL5105 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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JL5105C-NC | SPEC | Série JL5105 | 100M | 5 | NA | NA | 3.3V(1.1V)¹ | 10 Base-T | NA | 0~70℃ | QFN48 | 6*6 mm |
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JL5105C-NI | SPEC | Série JL5105 | 100M | 5 | NA | NA | 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.
JL5105C-NCSérie JL5105
JL5105C-NISérie JL5105
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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.
Why does JL5105 have no uplink?
It is built for unmanaged port expansion, where the switch forwards between its five front panel ports and the host controller plays no part. That removes the uplink routing and the host interface from the design. If the host must send or receive traffic, choose a device with an uplink instead.
Can I still manage the switch?
Not through a dedicated host interface, because there is not one. Without an uplink the host cannot reach the switch for configuration or monitoring. If your product needs management, remote access or host-originated traffic, the 3+1, 5+1 or larger configurations are the ones to compare.
How does it compare with JL5104?
Both are 100M devices in the same QFN48 package at 6 by 6 millimetres. JL5104 gives three external ports plus an RMII uplink; JL5105 gives five external ports and no uplink. Decide on whether the host needs to be on the network, then on how many front panel ports you need.
Can all five ports run at full rate together?
Actual forwarding capacity is set by the device's switching fabric and buffering, which the datasheet defines. Port count is not the same as simultaneous full rate throughput. If your traffic is heavily concentrated, test the real pattern on a prototype rather than assuming.
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.
Assistance technique
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Comparatif de sélection de transformateurs push-pull : VOOHU WHST06Q02E0 et Würth Elektronik 750316819
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