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LM331BXF
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Jiangsu RUNIC Tech Comparators, SOT23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LM331BXF
Jiangsu RUNIC Tech · Comparators · SOT23-5
LM331BXF from Jiangsu RUNIC Tech, in a SOT23-5. 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 | Noninverting input; common-mode range is (V-)+0.5 V to (V+)-1.5 V at 25°C and (V+)-2.0 V over -40°C to +125°C. |
| 2 | V- | power_in | Negative (lowest) power supply; single-supply operation is specified from 3 V to 32 V (VS = V+ - V-), with absolute maximum VS of 36 V. |
| 3 | -IN | input | Inverting input; common-mode range is (V-)+0.5 V to (V+)-1.5 V at 25°C and (V+)-2.0 V over -40°C to +125°C. |
| 4 | OUT | output | Open-drain output that requires an external pull-up; VOL is 360 mV max at 4 mA sink, and high-level leakage is 20 nA max at 5 V. |
| 5 | V+ | power_in | Positive (highest) power supply; operates 3 V to 32 V above V-, with absolute maximum VS of 36 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | SOT23-5 |
| 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, VS=(V+)-(V-) | VS | 36 | V | 6 | |||
| Signal input pin current (IN+, IN-) | -10 | 10 | mA | 6 | |||
| Signal output pin current | -55 | 55 | mA | 6 | |||
| Operating range, TA | TA | -40 | 125 | °C | 6 | ||
| Junction, TJ | TJ | -40 | 150 | °C | 6 | ||
| Storage, Tstg | Tstg | -65 | 150 | °C | 6 | ||
| Single-supply voltage | VS | 3 | 32 | V | 6 | ||
| Dual-supply voltage (each rail magnitude, ±) | VS | 1.5 | 16 | V | 6 | ||
| Operating Voltage Range | VS | 3 | 32 | V | 8 | ||
| Quiescent Current | IQ | 65 | 100 | uA | VS=5V, no load | 8 | |
| Quiescent Current | IQ | 100 | uA | VS=32V, no load, TA=-40C to +125C | 8 | ||
| Input offset voltage | VOS | -7.5 | 7.5 | mV | VS=5V to 32V | 8 | |
| Input offset voltage | VOS | -10 | 10 | mV | VS=5V to 32V, TA=-40C to +125C | 8 | |
| Input Bias Current | IB | 100 | nA | TA=-40C to +125C | 8 | ||
| Input Offset Current | IOS | 100 | nA | TA=-40C to +125C | 8 | ||
| Large signal differential voltage amplification | AVD | 50 | 200 | V/mV | VS=15V, Vo=1.4V to 11.4V, RL≥15k to (V+) | 8 | |
| Low-Level output voltage | VOL | 300 | 360 | mV | Isink≤4mA, VID=-1V | 8 | |
| Output Current (sinking) | IOL | 15 | mA | VO=1.5V; VID=-1V; VS=5V | 8 | ||
| High-Level Output Leakage Current | ILEAK | 2 | 20 | nA | (V+)=Vo=5V; VID=1V | 8 | |
| High-Level Output Leakage Current | ILEAK | 4 | 50 | nA | (V+)=Vo=32V; VID=1V | 8 | |
| Input Bias Current | IB | 10 | 50 | pA | TA=25C | 8 | |
| Input Offset Current | IOS | 10 | 50 | pA | TA=25C | 8 | |
| Propagation Delay H To L | TPHL | 0.5 | us | VS=5V; RPU=5.1KΩ; Overdrive=10mV | 8 | ||
| Propagation Delay H To L | TPHL | 0.3 | us | VS=5V; RPU=5.1KΩ; Overdrive=100mV | 8 | ||
| Propagation Delay H To L | TPHL | 0.64 | us | VS=32V; RPU=5.1KΩ; Overdrive=10mV | 8 | ||
| Propagation Delay L To H | TPLH | 1.5 | us | VS=5V; RPU=5.1KΩ; Overdrive=10mV | 8 | ||
| Propagation Delay L To H | TPLH | 0.3 | us | VS=5V; RPU=5.1KΩ; Overdrive=100mV | 8 | ||
| Propagation Delay L To H | TPLH | 0.25 | us | VS=32V; RPU=5.1KΩ; Overdrive=100mV | 8 | ||
| Junction-to-ambient thermal resistance | RϴJA | 273.8 | °C/W | 7 | |||
| Junction-to-case(top) thermal resistance | RϴJC(top) | 126.8 | °C/W | 7 | |||
| Junction-to-board thermal resistance | RϴJB | 85.9 | °C/W | 7 | |||
| Junction-to-top characterization parameter | ΨJT | 10.9 | °C/W | 7 | |||
| Junction-to-board characterization parameter | ΨJB | 84.9 | °C/W | 7 |
CAD (KiCad official)
- Symbol:
LM331BXF - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT23-5 (KiCad packages3D, STEP)
- 3D model files:
lm331bxf-etched.step/lm331bxf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm331bxf.step/lm331bxf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Jiangsu RUNIC Tech datasheet (14 pp, sha256
dafdb8706402c1c5, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).
# LM331BXF
**Jiangsu RUNIC Tech** · Comparators · SOT23-5
LM331BXF from Jiangsu RUNIC Tech, in a SOT23-5. 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 | Noninverting input; common-mode range is (V-)+0.5 V to (V+)-1.5 V at 25°C and (V+)-2.0 V over -40°C to +125°C. |
| 2 | V- | power_in | Negative (lowest) power supply; single-supply operation is specified from 3 V to 32 V (VS = V+ - V-), with absolute maximum VS of 36 V. |
| 3 | -IN | input | Inverting input; common-mode range is (V-)+0.5 V to (V+)-1.5 V at 25°C and (V+)-2.0 V over -40°C to +125°C. |
| 4 | OUT | output | Open-drain output that requires an external pull-up; VOL is 360 mV max at 4 mA sink, and high-level leakage is 20 nA max at 5 V. |
| 5 | V+ | power_in | Positive (highest) power supply; operates 3 V to 32 V above V-, with absolute maximum VS of 36 V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | SOT23-5 |
| 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, VS=(V+)-(V-) | VS | | | 36 | V | | 6 |
| Signal input pin current (IN+, IN-) | | -10 | | 10 | mA | | 6 |
| Signal output pin current | | -55 | | 55 | mA | | 6 |
| Operating range, TA | TA | -40 | | 125 | °C | | 6 |
| Junction, TJ | TJ | -40 | | 150 | °C | | 6 |
| Storage, Tstg | Tstg | -65 | | 150 | °C | | 6 |
| Single-supply voltage | VS | 3 | | 32 | V | | 6 |
| Dual-supply voltage (each rail magnitude, ±) | VS | 1.5 | | 16 | V | | 6 |
| Operating Voltage Range | VS | 3 | | 32 | V | | 8 |
| Quiescent Current | IQ | | 65 | 100 | uA | VS=5V, no load | 8 |
| Quiescent Current | IQ | | | 100 | uA | VS=32V, no load, TA=-40C to +125C | 8 |
| Input offset voltage | VOS | -7.5 | | 7.5 | mV | VS=5V to 32V | 8 |
| Input offset voltage | VOS | -10 | | 10 | mV | VS=5V to 32V, TA=-40C to +125C | 8 |
| Input Bias Current | IB | | | 100 | nA | TA=-40C to +125C | 8 |
| Input Offset Current | IOS | | | 100 | nA | TA=-40C to +125C | 8 |
| Large signal differential voltage amplification | AVD | 50 | 200 | | V/mV | VS=15V, Vo=1.4V to 11.4V, RL≥15k to (V+) | 8 |
| Low-Level output voltage | VOL | | 300 | 360 | mV | Isink≤4mA, VID=-1V | 8 |
| Output Current (sinking) | IOL | 15 | | | mA | VO=1.5V; VID=-1V; VS=5V | 8 |
| High-Level Output Leakage Current | ILEAK | | 2 | 20 | nA | (V+)=Vo=5V; VID=1V | 8 |
| High-Level Output Leakage Current | ILEAK | | 4 | 50 | nA | (V+)=Vo=32V; VID=1V | 8 |
| Input Bias Current | IB | | 10 | 50 | pA | TA=25C | 8 |
| Input Offset Current | IOS | | 10 | 50 | pA | TA=25C | 8 |
| Propagation Delay H To L | TPHL | | 0.5 | | us | VS=5V; RPU=5.1KΩ; Overdrive=10mV | 8 |
| Propagation Delay H To L | TPHL | | 0.3 | | us | VS=5V; RPU=5.1KΩ; Overdrive=100mV | 8 |
| Propagation Delay H To L | TPHL | | 0.64 | | us | VS=32V; RPU=5.1KΩ; Overdrive=10mV | 8 |
| Propagation Delay L To H | TPLH | | 1.5 | | us | VS=5V; RPU=5.1KΩ; Overdrive=10mV | 8 |
| Propagation Delay L To H | TPLH | | 0.3 | | us | VS=5V; RPU=5.1KΩ; Overdrive=100mV | 8 |
| Propagation Delay L To H | TPLH | | 0.25 | | us | VS=32V; RPU=5.1KΩ; Overdrive=100mV | 8 |
| Junction-to-ambient thermal resistance | RϴJA | | 273.8 | | °C/W | | 7 |
| Junction-to-case(top) thermal resistance | RϴJC(top) | | 126.8 | | °C/W | | 7 |
| Junction-to-board thermal resistance | RϴJB | | 85.9 | | °C/W | | 7 |
| Junction-to-top characterization parameter | ΨJT | | 10.9 | | °C/W | | 7 |
| Junction-to-board characterization parameter | ΨJB | | 84.9 | | °C/W | | 7 |
## CAD (KiCad official)
- Symbol: `LM331BXF`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT23-5 (KiCad packages3D, STEP)
- 3D model files: `lm331bxf-etched.step` / `lm331bxf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm331bxf.step` / `lm331bxf.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Jiangsu RUNIC Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590907381947572224) (14 pp, sha256 `dafdb8706402c1c5`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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](docs/lm331bxf-datasheet.pdf)