8-Port Gigabit PoE+ Switch Reference Design
An illustrative reference design for an 8-port Gigabit PoE+ switch at the access layer of the five-layer network architecture: 8 Gigabit copper ports (802.3at PoE+ output for powered devices such as APs and IP cameras) + 2 SFP Gigabit optical uplinks, powered by a 54V DC adapter; the copper ports pair 2×4 stacked RJ45s with discrete dual-port PoE LAN transformers. Each position is marked with the VOOHU parts available, recommended part numbers and package pinouts.
Illustrative PCB ⇄ Schematic
Illustrative top-side view arranged by functional zone (not the actual layout). Red numbered dots mark positions VOOHU can supply. Click a component on the board, an entry in the index below or a part in the schematic to see recommended parts and package pinouts on the right.
Illustrative SFP uplink topology: the transmit / receive pairs of the JL6110 switch IC's 1000Base-X expansion port connect through AC-coupling capacitors (fitted as the SerDes requires; the module is already AC-coupled internally) to TD± / RD± of the SFP 20pin host connector (per SFF-8431 MSA); the control and status lines (I²C, TX_DISABLE, MOD_ABS, RX_LOS) go to the optional management MCU; the module's VccT / VccR are filtered from +3V3 by VOOHU molded inductor L1 and bypass capacitors. SFP1 is shown; SFP2 is identical. Each pair is drawn as 1 line; coupling capacitors and pull-ups are drawn as symbols without values.
Board bill of materials
Summarized by position; click any row to locate it on the board above.
| No. | Zone | Position | Ref. | VOOHU category | Recommended part | Availability |
|---|---|---|---|---|---|---|
| 01 | A Optical uplinks | SFP uplink ports ×2 (1×2 ganged cage + 20-pin connector) | J1 J2 | SFP Cage / SFP Connectors | WHSFP00712W008 | VOOHU |
| 02 | A Optical uplinks | SFP supply filter inductors ×2 | L1 L2 | Molded Inductors | WHYTA0420 series | VOOHU |
| 03 | B Gigabit PoE copper ports | Plain RJ45 2×4 (GE1–8) | J3 | RJ45 Connector | SYT59212488DB1A1DY1B022 | VOOHU |
| 04 | B Gigabit PoE copper ports | Port gas discharge tubes ×4 | GDT1 GDT2 GDT3 GDT4 | GDT | WHGD200V1P0B | VOOHU |
| 05 | B Gigabit PoE copper ports | Gigabit PoE LAN transformers ×4 | T1 T2 T3 T4 | 10/100/1000 BASE-T | WHSG48002PG | VOOHU |
| 06 | B Gigabit PoE copper ports | Ethernet ESD arrays (2 per port) | D1 D2 D3 D4 D5 D6 D7 D8 | TVS ESD | WHALD03G4U | VOOHU |
| 07 | B Gigabit PoE copper ports | PoE PSE controllers ×2 (4-channel) | U3 U4 | — | — | Non-VOOHU |
| 08 | C Switch IC | 8-port Gigabit switch | U1 | Ethernet Switch | JL6110-PC | VOOHU |
| 09 | C Switch IC | 25MHz crystal | Y1 | — | — | Non-VOOHU |
| 10 | D Management (optional) | Management MCU (optional) | U2 | — | — | Non-VOOHU |
| 11 | E Power | 54V DC jack | J4 | — | — | Non-VOOHU |
| 12 | E Power | Bidirectional input TVS | D9 | TVS ESD | WHTB058VA | VOOHU |
| 13 | E Power | Power-line common-mode choke (EMI) | L3 | Power Line Common Mode Chokes | WHACM07A40R501 | VOOHU |
| 14 | E Power | Buck converters ×3 (54V→12V, 12V→3.3V / 1.1V) | U5 U6 U7 | — | — | Non-VOOHU |
| 15 | E Power | Molded inductors ×3 (DC-DC) | L4 L5 L6 | Molded Inductors | WHYT0630 Series | VOOHU |
Resources & downloads
Board bill of materials
Reference designators, zones, VOOHU categories, recommended parts and availability for all 15 positions. Opens directly in Excel.
Datasheet collection
Datasheet PDFs for the VOOHU parts recommended on this board.
Design files & footprint library
Schematic, PCB, and VOOHU part footprints and 3D models.
Coming soonRequest the 8-Port gigabit PoE+ switch reference design full package
Includes the full-board position list, datasheets for the recommended VOOHU parts and position-by-position selection notes. For advice tailored to your port count, PoE power budget or magnetics option (discrete / integrated), describe it in your requirements. We reply within 24 hours on business days.
