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TPS2373-4RGWR

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Texas Instruments Ethernet Transceivers, VQFN-20-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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TPS2373-4RGWR

Texas Instruments · Ethernet Transceivers · VQFN-20-EP(5x5)

TPS2373-4RGWR from Texas Instruments, in a VQFN-20-EP(5x5). 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 VDD power_in Positive PoE input supply rail, bypass with 0.1µF capacitor to VSS.
2 DEN bidirectional Detection and enable input; connect 24.9kΩ resistor to VDD for PoE detection or pull to VSS during operation to disable pass-through MOSFET.
3 CLSA output Open-drain classification current output A; connect resistor to VSS to set first classification current per IEEE 802.3bt.
4 VSS power_in Negative supply rail connection from PoE source.
5 VSS power_in Negative supply rail connection from PoE source.
6 CLSB output Open-drain classification current output B; connect resistor to VSS to set second classification current per IEEE 802.3bt.
7 REF output Internal 1.5V voltage reference; connect 49.9kΩ ±1% resistor to VSS.
8 AMPS_CTL output Automatic MPS control output; connect resistor to VSS to set MPS current amplitude or leave open to disable MPS function.
9 MPS_DUTY input MPS duty cycle selection input referenced to VSS; resistor to VSS selects duty cycle as 5.4% (open), 8.1% (60.4kΩ), or 12.5% (shorted).
10 APD input Auxiliary Power Detect input; voltage 1.65V above RTN disables pass-through MOSFET, connect to RTN if not used.
11 RTN power_in Drain of PoE pass-through MOSFET; surge current limit approximately 200mA (TPS2373-3) or 335mA (TPS2373-4), normal current limit 1.85A or 2.2A.
12 RTN power_in Drain of PoE pass-through MOSFET; surge current limit approximately 200mA (TPS2373-3) or 335mA (TPS2373-4), normal current limit 1.85A or 2.2A.
13 PG output Power Good; open-drain active high output referenced to RTN, low during surge phase and open when surge complete to enable downstream converter.
14 VC_OUT output Low-voltage auxiliary supply output for PWM controller; bypass with 1µF capacitor to RTN, startup current source capability up to 30mA at VDD ≥ 28V.
15 VC_IN input Auxiliary bias voltage input (typically 8V to 15V referenced to RTN); bypass with 0.1µF capacitor to RTN, connects internally to VC_OUT after converter startup.
16 UVLO_SEL input UVLO selection input referenced to RTN; keep open for PWM with UVLO above 7.25V, pull low for 3.9V threshold selection.
17 TPL output PSE Allocated Power type L output (binary encoded); open-drain active high referenced to RTN, becomes high-impedance if auxiliary adapter detected.
18 TPH output PSE Allocated Power type H output (binary encoded); open-drain active high referenced to RTN, indicates PSE power class allocation.
19 BT output IEEE802.3bt detection indicator; open-drain active low referenced to RTN, low indicates IEEE802.3bt PSE Type 3 or 4 detected.
20 NC unconnected No Connect pin; leave open.
21 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package VQFN-20-EP(5x5)
Category Interface
Pins 21

CAD (KiCad official)

  • Symbol: TPS2373-4RGWR
  • Footprint: Package_DFN_QFN:QFN-20-1EP_5x5mm_P0.65mm_EP3.35x3.35mm
  • 3D model: VQFN-20-EP(5x5) (KiCad packages3D, STEP)
  • 3D model files: tps2373-4rgwr-etched.step / tps2373-4rgwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tps2373-4rgwr.step / tps2373-4rgwr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (46 pp, sha256 215423c8efd715bb, retrieved 2026-09-22, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF