Is there a pin-compatible replacement for LM339?

Yes, the LM339 is an industry-standard part. A LM339 from manufacturers like Texas Instruments, Onsemi, or STMicroelectronics in the same package (e.g., SOP-14 or DIP-14) should be pin-compatible. Always verify the datasheet for the specific manufacturer.

What risks should I check before replacing LM339?

When replacing an LM339, verify the package and pinout, ensure the substitute's supply voltage range meets your circuit's needs (up to 32V), and confirm the output type is open-collector/open-drain. Also compare input offset voltage and response time.

LM339 Alternatives, Datasheet & Cross Reference | JSMSEMI

The LM339 is a widely-used quad voltage comparator. While finding a direct drop-in replacement can be challenging, several functional alternatives exist that may suit your application after careful review of electrical and physical differences.

AI replacement insight

Package riskhigh

Many alternatives are in different, non-compatible surface-mount packages.

Electrical riskmedium

Supply voltage range must be carefully verified; many parts do not support 32V.

Sourcing risklow

The LM339 itself is a commodity part available from many vendors.

Can it be replaced directly?

No direct drop-in replacement was found in this review. However, the LM339 is a multi-sourced part, so sourcing the same part in the correct package from another vendor is the recommended path.

Best replacement path

Source the same LM339 part number from a different manufacturer like TI or ST. For new designs, consider modern quad comparators, accepting that a board redesign will be necessary.

Main risk

The main risk is mismatch in package and supply voltage. Many modern alternatives are not available in legacy DIP/SOP-14 packages and have lower voltage ratings than the LM339's 32V maximum.

Recommended alternatives

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Alternative comparison matrix

Feature / factor	LM339	LTC1444CDHD#PBF	LTC1444CS#TRPBF	Compatibility / risk
Package	DIP-14 / SOP-14	16-WFDFN	16-SOIC	16-WFDFN / 16-SOIC — Not a drop-in replacement.; LTC1444CS#TRPBF: Not a drop-in replacement.
Voltage	2V to 32V	2V to 11V	2V to 11V	2V to 11V — Significantly lower max supply voltage.; LTC1444CS#TRPBF: Significantly lower max supply voltage.
Number Of Elements	4	4	4	4 — matched; LTC1444CS#TRPBF: matched
Output Type	Open Collector	Open-Drain	Open-Drain	Open-Drain — Open-Drain is compatible with Open Collector.; LTC1444CS#TRPBF: Open-Drain is compatible with Open Collector.
Input Offset Voltage (Max)	5mV	-	10mV	10mV — Higher offset may affect precision.

Application & sourcing insights

Questions & answers

The best alternative is often another manufacturer's version of the LM339 (e.g., from TI or STMicroelectronics), as it's a multi-sourced industry standard. If seeking an upgrade, parts like the LTC1444 offer similar functionality but require design changes.