LM358 vs LM2904 vs LM393: Op Amp or Comparator?
2026-10-16 · PartVane Electronics
The LM358DR and LM2904DR are dual op amps from one TI datasheet. The LM393DR looks similar in an SO-8 but is a dual comparator, not an op amp. Mixing them up is a common BOM mistake.
What each part is
| Item | LM358 / LM2904 | LM393 |
|---|---|---|
| Function | Dual operational amplifier | Dual voltage comparator |
| Datasheet | TI SLOS068AB (Oct 2024) | TI SLCS005AH (Apr 2025) |
| B-version highlights | 3V to 36V supply, 300µA per channel, 1.2MHz unity-gain bandwidth, internal RF/EMI filter, 2kV HBM ESD | Up to 38V maximum rating, 200µA per comparator, 1µs response, 0.37mV offset, 2kV HBM ESD |
| Input range | Includes ground | Includes ground |
| Output | Op-amp output | Compatible with TTL, MOS and CMOS |
Quote LM358DR for your build
Send the quantity: we reply within 24 hours with price, availability and photos of the actual parts with the date code. Samples and small batches welcome. Comparing both? Quote LM2904DR too.
How to choose
- Need to amplify or buffer an analog signal: LM358 or LM2904 family.
- Need a yes/no threshold decision (over-voltage, zero-cross, level detect): LM393 family.
- Do not use an op amp as a comparator in a design that needs defined switching speed; use the comparator.
LM358 vs LM2904
Both are covered by the same datasheet, so confirm the exact suffix (B, BA, A, V) and temperature grade on the datasheet ordering table before approving a substitute. Suffix differences change offset voltage (3mV max for A and B, 2mV max for BA) and ESD/EMI features.
Sourcing
Send us the full MPN with suffix and package. Samples with real photos and date code are provided before payment. Request a quote.
Sources
Parts in This Article
- LM358DR datasheet, pinout & specs – Texas Instruments
- LM2904DR datasheet, pinout & specs – Texas Instruments
- LM393DR datasheet, pinout & specs – Texas Instruments