Alternatives to Texas Instruments 6N139
Texas Instruments 6N139 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 6N139Texas Instruments |  6N139Vishay Semiconductor Opto Division | 6N139Broadcom Limited | +2more | |
|---|---|---|---|---|
| FFF Compatibility | The part has an identical 8-DIP footprint and matches the pinout assignments (pins 1-8 are identical, including the Darlington base terminal on pin 7).The part shares the standard 8-DIP package outline with identical physical dimensions and through-hole mounting.All electrical characteristics, including 18V maximum output, 60mA output current, and 500% minimum CTR, match or exceed the original TI specification. | Matches the standard 8-DIP pinout exactly with the Darlington base on pin 7.Shares the standard 8-DIP packaging style and physical form factor.Features a lower isolation voltage (3750Vrms vs 5300Vrms) and a narrower operating temperature range (-40°C to 85°C vs -55°C to 100°C). | ||
 AI Summary | 6N139 by Texas Instruments: Optoisolator Darlington with Base Output 5300Vrms 1 Channel 8-DIP. | This is the highest-confidence drop-in replacement. It is actively produced, maintains the exact same pinout, and matches all the original's critical specifications, including isolation voltage and temperature range.
| This part is a high-quality alternative from Broadcom that is functionally compatible for most standard designs, though it features a lower isolation rating and narrower temperature limits.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Optoisolator Darlington with Base Output 5300Vrms 1 Channel 8-DIP | Optoisolator Darlington with Base Output 5300Vrms 1 Channel 8-DIP | Optoisolator Darlington with Base Output 3750Vrms 1 Channel 8-DIP | |
| Manufacturer | Texas Instruments | Vishay Semiconductor Opto Division | Broadcom Limited | |
| Type | Optocouplers, Optoisolators | Optocouplers, Optoisolators | Optocouplers, Optoisolators | |
| Datasheet | Open | Open | Open | |
| Lead Time | 7 days | 13 weeks | 17 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.49.8000 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Input Type | DC | - | - | |
| Output Type | Darlington with Base | - | - | |
| Mounting Type | Through Hole | - | - | |
| Package / Case | 8-DIP (0.300", 7.62mm) | - | - | |
| Number of Channels | 1 | - | - | |
| Voltage - Isolation | 5300Vrms | - | - | |
| Operating Temperature | -55°C ~ 100°C | - | - | |
| Voltage - Output (Max) | 18V | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 6N136onsemi | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Texas Instruments 6N139 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 Texas Instruments 6N139 are the 6N139 (Vishay Semiconductor Opto Division) and the 6N139 (Broadcom Limited), 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 6N139 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 6N139 (Texas Instruments) is a part in the Optocouplers, Optoisolators category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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