component
LP311DR
Public Made by Adomby adom
Texas Instruments Comparators, SOIC-8. Pinout cross-checked by two models against the datasheet, 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
markdownLP311DR
Texas Instruments · Comparators · SOIC-8
LP311DR from Texas Instruments, in a SOIC-8. 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 | EMIT OUT | output | Emitter output, which can swing below the negative supply; voltage from emitter output to VCC− is rated at 30 V maximum. |
| 2 | IN+ | input | Non-inverting comparator input; with |
| 3 | IN− | input | Inverting comparator input; with |
| 4 | VCC− | power_in | Negative supply rail; the supply voltage VCC+ − VCC− is specified from 3.5 V to 30 V. |
| 5 | BALANCE | passive | Offset-balancing pin used with a trim network to minimize input offset voltage; if offset balancing is not used, it should be shorted to BAL/STRB. |
| 6 | BAL/STRB | input | Strobe input that turns the output off regardless of the inputs when pulled low; it must be current driven at 100 µA to 300 µA and must not be connected directly to ground. |
| 7 | COL OUT | output | Collector output with 25 mA drive capability; voltage from collector output to VCC− is rated at 40 V maximum. |
| 8 | VCC+ | power_in | Positive supply rail; the supply voltage VCC+ − VCC− is specified from 3.5 V to 30 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LP311DR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lp311dr-etched.step/lp311dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lp311dr.step/lp311dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (14 pp, sha256
3c7d5a253861da53, retrieved 2026-10-08, tier: manufacturer) - 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).