component

LM331AU2-S5TR

Public Made by Adom

by adom

3PEAK Comparators, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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LM331AU2-S5TR

3PEAK · Comparators · SOT-23-5

LM331AU2-S5TR from 3PEAK, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 +IN input Non-inverting comparator input with the same voltage range as -IN (V- to V+ - 1.5V).
2 V- power_in Negative power supply, normally tied to ground; V+ to V- must be 2.5V to 36V, with a 0.1µF bypass capacitor if not grounded.
3 -IN input Inverting comparator input with voltage range from V- to V+ - 1.5V.
4 OUT output Comparator output, open-collector type that can be wire-ANDed, and it is TTL/CMOS compatible.
5 V+ power_in Positive power supply of 2.5V to 36V (absolute maximum V+ to V- is 42V), with a 0.1µF bypass capacitor placed close to the part.

Key specifications

Parameter Value
Manufacturer 3PEAK
Package SOT-23-5
Category Amplifiers/Comparators
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage (VDD) VDD 2.5 36 V ● full operating temperature range (-40°C ~ +125°C) 3
Input offset voltage (LM331A, LM331AU, LM331AU2) VOS -6 0.6 6 mV VCC = 5 V to MAX, VIC = VICR(min), VO = 1.4V, -40°C ~ +125°C ● 3
Common-mode input voltage range, minimum VCM 0 V 25°C 3
Common-mode input voltage range, minimum over temperature VCM 0 V ● -40°C ~ +125°C 3
Low-level output voltage VOL 250 400 mV IOL = 4mA, VID = −1V 3
Low-level output voltage over temperature VOL 500 mV ● full operating temperature range (-40°C ~ +125°C) 3
Low-level output current IOL 10 mA VOL = 1.5 V, VID = −1 V 3
Quiescent current per comparator IQ 90 300 μA VCC = 5 V 3
Input current (+IN, -IN) IIN -20 20 mA Note 2 2
Output current (OUT) IOUT -20 20 mA 2
Operating temperature range -40 125 °C 2
Maximum junction temperature TJ 150 °C 2
Storage temperature range TSTG -65 150 °C 2
Lead temperature (soldering) 260 °C 10 sec 2
Thermal resistance, 5-pin SOT (first printed value, column assignment to verify) RθJA 118.3 ℃/W 2
Thermal resistance, 5-pin SOT (second printed value, column assignment to verify) RθJB 52.01 ℃/W 2

CAD (KiCad official)

  • Symbol: LM331AU2-S5TR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lm331au2-s5tr-etched.step / lm331au2-s5tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm331au2-s5tr.step / lm331au2-s5tr.glb are the bare package body.

Provenance

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

  • Datasheet: 3PEAK datasheet (13 pp, sha256 4ece3cc86757ac08, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (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