Alternatives to onsemi LM311M
onsemi LM311M and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
Equivalent and substitute parts for onsemi LM311M
 LM311Monsemi | LM311M/NOPBTexas Instruments |  LM311DR2Gonsemi | +2more | |
|---|---|---|---|---|
| FFF Compatibility | Identical 8-pin SOIC (D package) footprint and pin assignments.Matches the physical dimensions and mounting style of the original part.Identical electrical performance, temperature range (0°C to 70°C), and absolute maximum ratings. | Utilizes the same standard 8-pin SOIC footprint and pin-by-pin assignments.Matches the SOIC-8 packaging envelope and surface-mount configuration.Supply voltage range is limited to 30V (±15V) compared to the original TI part's 36V (±18V). | ||
 AI Summary | LM311M by onsemi: Comparator Standard (General Purpose) DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL 8-SOIC. | This is the official, lead-free direct replacement manufactured by Texas Instruments. It preserves the exact same layout, pinout, and full supply voltage range of up to 36V (±18V).
| A highly standard second-source replacement from onsemi. While pinout and footprint are fully compatible, it has a slightly lower maximum supply voltage ceiling of 30V (or ±15V).
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 LM311DSTMicroelectronics | In stock | Active | 5Alternatives availableSee Alternatives |
 LM7301IM5Texas Instruments | Discontinued | Obsolete | 3Alternatives availableSee Alternatives |
 LM393MTexas Instruments | In stock | Obsolete | 6Alternatives availableSee Alternatives |
 LM117HTexas Instruments | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
 LM319NSTMicroelectronics | Non-stock | Obsolete | 4Alternatives availableSee Alternatives |
 LM324Monsemi | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi LM311M is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the onsemi LM311M are the LM311M/NOPB (Texas Instruments) and the LM311DR2G (onsemi), out of 4 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the LM311M are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The LM311M (onsemi) is a part in the Linear category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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