The LM211QDR is an excellent alternative, offering the same core functionality with an upgraded temperature range (-40°C to 125°C) and automotive qualification.
Best Alternatives to LM311DR
The LM311DR is a versatile, high-speed voltage comparator from Texas Instruments in a SOIC-8 package. When seeking alternatives, focus on single-channel comparators with similar response times (around 165ns) and strobe functionality.
AI replacement insight
Electrical risklow
Key parameters match or are improved.
Package risklow
Package and pinout are expected to be identical.
Can it be replaced directly?
Yes, the LM211QDR is a potential direct replacement for the LM311DR. It is an automotive-grade version with a wider operating temperature range in the same package.
Best replacement path
The best replacement path is to use an upgraded version from the same family, such as the LM211QDR, which offers a wider temperature range and automotive qualification.
Main risk
The main risk is overlooking the single-channel and strobe function of the LM311DR; many similar part numbers (like LM393) are dual-channel with a different pinout.
Recommended alternatives
Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.
Alternative comparison matrix
| Feature / factor | LM311DR | LM211QDR | Alt 2 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOIC (8) | SOIC-8 | SOIC-8 — Package matches. | ||
| Channels | 1 (inferred) | 1 | 1 — Number of channels matches. | ||
| Voltage | 3.5 V to 30 V | 3.5 V to 30 V | 3.5 V to 30 V — Supply voltage range matches. | ||
| Temperature | 0°C to 70°C | -40°C to 125°C | -40°C to 125°C — Wider operating temperature range. | ||
| Response Time | 165 ns | 165 ns | 165 ns — Response time matches. | ||
| Application | Commercial | AEC-Q100 | AEC-Q100 — Automotive qualified version. |