TL331LV
Public Unreviewedby barrett-land
TL331LV - single low-voltage comparator, SOT-23-5, with REVERSED input pinout (IN- = pin 1, IN+ = pin 3). Canonical adom-lbr JSON + KiCad symbol/footprint/3D. Used on the USB3-to-Ethernet Data-Only Molecule.
3D Model
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markdownTL331LV
Comparator · package Package_TO_SOT_SMD:SOT-23-5_HandSoldering · MPN TL331LV · Texas Instruments
Used on the USB3 to Ethernet (Data Only) Molecule board as 1x (U2), driving the HD3SS3212 USB-C orientation mux.
Ships the KiCad symbol, footprint, STEP + GLB 3D model, and the canonical adom-lbr JSON (one-command conversion to KiCad, native Altium, or EAGLE/Fusion).
⚠️ Reversed input pinout
The TL331LV deliberately reverses its inputs relative to the common SOT-23-5 comparator pinout. TI flags this on the datasheet pin diagram: "Note reversed inputs compared to similar common pinout."
| Pin | TL331LV | LMV331 (common pinout) |
|---|---|---|
| 1 | IN− | IN+ |
| 2 | GND | GND |
| 3 | IN+ | IN− |
| 4 | OUT | OUT |
| 5 | V_CC | V_CC |
Only the inputs differ: GND, OUT and V_CC are identical. That makes the two parts mechanically interchangeable drop-ins whose comparator polarity is opposite, so an unintended substitution silently inverts the decision and still passes AOI.
Used deliberately here: fitting the TL331LV in an LMV331 footprint inverts the CC1/CC2 orientation decision with zero layout change, which is how the molecule's USB-C orientation detection was corrected.
Pinout as shipped
1 IN- input
2 V- power_in
3 IN+ input
4 OUT output
5 V+ power_in