CROSS-REFERENCE ALTERNATIVE
LM339SR is a Chinese-manufactured Comparator from COSINE (科山芯创) that cross-references to LM139, and also to LM339.
It is a SOP14 device positioned as a domestic-supply option against the imported: shorter lead times, no allocation risk and a stable price for volume production. Because the parts are not pin-identical in every case, the engineering checklist below lists what to verify before you commit.
Cross-reference · Before you substitute · Related parts · FAQ · Request a quote
LM339SR — Comparator, alternative to LM139
LM339SR is supplied by Shenzhen Jingteng Electronics (JTDZ Tech) as a domestically sourced option for LM139, LM339 (LM239). Imported parts in this class are frequently subject to allocation, long lead times and steep price swings. A Chinese-manufactured equivalent removes that exposure: the parts are production-validated in industrial, consumer and automotive designs and ship from stock on a short lead time.
Cross-reference chart — which imported parts does LM339SR replace?
Every imported part number that LM339SR is published as a cross-reference alternative to, per the COSINE (科山芯创) 2025 selection table:
| imported part number | brand | Replaced by (this part) |
|---|---|---|
| LM139 | — | LM339SR |
| LM339 | LM239 | LM339SR |
Cross-reference means functional equivalence in the same application role. It is not a blanket claim of pin-for-pin identity — confirm package, pinout and the parameters listed below before you release a design change.
Device information
| Part number | LM339SR |
| Manufacturer | COSINE (科山芯创) |
| Device class | Comparator |
| Package | SOP14 |
| Pin Count | 14 |
| Verified and new, traceable date code | |
| Stock | In stock, ships within 24 hours |
| Description | Comparator, SOP14 package. |
What to verify before substituting LM339SR
These are the parameters that decide whether a cross-reference works in practice. Run through the list against the datasheet before releasing a change:
- Propagation delay, including the delay added by the output pull-up and the input overdrive you apply
- Output stage type — open-drain vs push-pull. Swapping one for the other changes the pull-up requirement and the logic polarity
- Input common-mode range, including whether the input can sense ground
- Built-in hysteresis; if the had none you must add external positive feedback
- Input offset voltage and its drift
- Supply range and single-supply operation
- Package and pinout, plus output logic-level compatibility
Typical applications
- Threshold detection and level sensing
- Over/under-voltage and window detectors
- Zero-crossing and oscillator circuits
- Power-supply sequencing and supervisor logic
- Pulse-width and duty-cycle circuits
- Sensor limit alarms
Related COSINE parts and alternatives
Other {BRAND} parts in the same device family or the same device class — useful when you are cross-referencing a whole BOM rather than a single line item.
| COSINE part | Package | Cross-references to | Relation |
|---|---|---|---|
| COS3201TR | SOT23-5 | TLV3201AIDBVR, TLV7011DBVR, TS75S56F | Comparator |
| COS3202SR | SOP8 | TLV3202 | Comparator |
| COS3502SR | SOP8 | TLV3502 | Comparator |
| LM393SR | SOP8 | LM193, LM393 | Comparator |
Prefer the imported? We also stock LM339DR — compare price, lead time and availability before you decide.
Frequently asked questions
What does LM339SR replace?
According to the COSINE (科山芯创) 2025 cross-reference table, LM339SR is published as an alternative to LM139, LM339 (LM239).
Is LM339SR a pin-to-pin drop-in for LM139?
Cross-reference means the part is intended for the same application role; it is not a blanket guarantee of pin-for-pin identity. Check package, pinout and the parameters listed under “What to verify” above, or send us your BOM and we will confirm before you commit.
Can you supply the LM139 as well?
Yes. We source both the imported and the Chinese-manufactured alternative, so you can compare price, lead time and availability on the same quote.
What is the MOQ and lead time for LM339SR?
MOQ 1 pc. LM339SR is held in stock and ships within 24 hours; quotes are returned within 2 business hours. We ship worldwide including India, Vietnam and the Middle East.
Request a quote for LM339SR
Send us the part number and target quantity — we reply within 2 business hours with price, stock and a cross-reference confirmation.
Request a quote More Amplifiers / Data Conversion
Genuine original parts guaranteed — traceable lot & date code, X-ray / visual inspection and third-party test supported before shipment.
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