component
TPS2375DR
Public Unreviewedby Ray
Texas Instruments Power Over Ethernet (PoE) Controllers, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTPS2375DR
Texas Instruments · Power Over Ethernet (PoE) Controllers · SOIC-8
TPS2375DR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ILIM | output | Inrush current-limit program pin. Connect a resistor R(ILIM) from ILIM to VSS to set the start-up inrush current per I(LIM) = 25000 / R(ILIM). Practical range 62.5 kΩ to 500 kΩ; 178 kΩ recommended for legacy-PSE compatibility. Must not be left open or shorted to VSS. |
| 2 | CLASS | output | Classification current program pin. Connect a resistor R(CLASS) from CLASS to VSS to program the IEEE 802.3af classification signature (Class 0-4, 255 Ω to 4420 Ω). The device sources the classification current when V(VDD) is between 13 V and 21 V. Must not be shorted to ground. |
| 3 | DET | output | Detection signature pin. Connect a 24.9-kΩ ±1% resistor R(DET) from DET to VDD to present the valid PD detection signature. R(DET) is internally connected across the input when V(VDD) is between 1.4 V and 11.3 V and disconnected outside that window to conserve power. |
| 4 | VSS | power_in | Input supply negative rail; serves as the local ground reference (return line on the source side of the TPS2375 from the PSE). |
| 5 | RTN | power_out | Switched negative return output, drain of the internal pass MOSFET. Provides the switched negative power rail for the downstream DC/DC converter and is used as the low-side reference for the PD load. Sinks up to 350 mA operating (515 mA absolute). Also monitored by the PG comparator; the MOSFET body diode clamps VSS to RTN when the PoE input is absent. |
| 6 | PG | output | Open-drain, active-high power-good output. Goes high-impedance when the internal pass MOSFET is enabled and the device is not in inrush current limiting; pulled to RTN by the internal open-drain transistor in all other states except detection. Requires an external pullup and is guaranteed with ≥4 V between VDD and RTN. |
| 7 | NC | unconnected | No internal connection on the TPS2375 (pin 7 is UVLO on the TPS2376 variant only). |
| 8 | VDD | power_in | Positive input supply from the rectified PSE (PoE) input. Provides operating power to the controller and is used to monitor the line voltage for mode-of-operation decisions. Absolute maximum 100 V; recommended operating range 0 to 57 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
TPS2375DRTPS2375PWTPS2375PWRTPS2376DTPS2376DRTPS2377DTPS2377DR
CAD (KiCad official)
- Symbol:
TPS2375DR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (28 pp, sha256
00fa6a8f9f7131e7, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).