Alternatives to onsemi 74LCX138MTC
onsemi 74LCX138MTC and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 74LCX138MTConsemi |  74LCX138MTCXonsemi |  SN74LVC138APWRTexas Instruments | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Identical 16-TSSOP footprint and pin assignments.Matches the standard 16-TSSOP package dimensions and mounting style perfectly.Same logic family (74LCX) with identical functional and electrical performance. | Identical 16-TSSOP pinout and pitch.Standard 16-TSSOP package size.The 74LVC138A series matches the 24mA output drive, logic thresholds, and propagation delay of the 74LCX138. | ||
 AI Summary | 74LCX138MTC by onsemi: Decoder/Demultiplexer 1 x 3:8 16-TSSOP. | This is the direct, active successor part from onsemi (which acquired Fairchild Semiconductor). The 'X' suffix merely indicates Tape & Reel packaging instead of tube, making it a seamless drop-in replacement with no layout or electrical changes.
| This is a high-reliability second-source replacement from Texas Instruments. The 74LVC logic family is fully compatible with the 74LCX family at 3.3V rails, offering identical 24mA drive strengths and 5V-tolerant inputs.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | Unknown | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Decoder/Demultiplexer 1 x 3:8 16-TSSOP | Decoder/Demultiplexer 1 x 3:8 16-TSSOP | Decoder/Demultiplexer 1 x 3:8 16-TSSOP | |
| Manufacturer | onsemi | onsemi | Texas Instruments | |
| Type | Logic | Logic | Logic | |
| Datasheet | Open | Open | Open | |
| Lead Time | 7 days | 28 weeks | 16 weeks | |
| Country of Origin | PH, US, TW | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0070 | - | - | |
| Moisture Sensitivity Level | - | - | - | |
| Type | Decoder/Demultiplexer | - | - | |
| Circuit | 1 x 3:8 | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) | - | - | |
| Voltage - Supply | 2V ~ 3.6V | - | - | |
| Independent Circuits | 1 | - | - | |
| Operating Temperature | -40°C ~ 85°C | - | - | |
| Voltage Supply Source | Single Supply | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 74LCX08MTConsemi | In stock | Obsolete | 5Alternatives availableSee Alternatives |
| 74LCX14MTConsemi | In stock | Obsolete | 5Alternatives availableSee Alternatives |
 74LCX38Monsemi | In stock | Obsolete | 4Alternatives availableSee Alternatives |
 74LCX14MTRSTMicroelectronics | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
| 74LCX14MTCX_NLonsemi | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
| 74LCX14Monsemi | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi 74LCX138MTC 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 74LCX138MTC are the 74LCX138MTCX (onsemi) and the SN74LVC138APWR (Texas Instruments), out of 3 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 74LCX138MTC 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 74LCX138MTC (onsemi) is a part in the Logic category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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