component
LM311P
Public Made by Adomby adom
Texas Instruments Comparators, PDIP-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
markdownLM311P
Texas Instruments · Comparators · PDIP-8
LM311P from Texas Instruments, in a PDIP-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 | tri_state | Open-emitter comparator output that sinks current when low and presents high impedance when high; maximum voltage 30V from VCC−. |
| 2 | IN+ | input | Noninverting comparator input with operating voltage range VCC− + 0.5V to VCC+ − 1.5V. |
| 3 | IN− | input | Inverting comparator input with operating voltage range VCC− + 0.5V to VCC+ − 1.5V. |
| 4 | VCC− | power_in | Negative power supply connection; serves as ground reference for single-supply operation or negative rail for dual-supply operation. |
| 5 | BALANCE | input | Offset voltage balance adjustment input pin; leave unconnected or short to adjacent pin if offset balancing not used. |
| 6 | BAL/STRB | input | Strobe control input for output enable; must be current-driven at −3 to −5 mA to enable output (do not connect directly to ground). |
| 7 | COL OUT | tri_state | Open-collector comparator output that sinks current when low and presents high impedance when high; maximum voltage 40V for LM311. |
| 8 | VCC+ | power_in | Positive power supply connection; recommended operating supply range 3.5V to 30V span (VCC+ − VCC−). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM311P - Footprint:
Package_DIP:DIP-8_W7.62mm - 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files:
lm311p-etched.step/lm311p-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm311p.step/lm311p.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (42 pp, sha256
1877bb45737cb7e8, retrieved 2026-09-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).