Alternatives to onsemi MC74LCX157DT
onsemi MC74LCX157DT and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 MC74LCX157DTonsemi |  74LCX157MTCXonsemi |  SN74LVC157APWRTexas Instruments | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Features the identical 16-TSSOP package footprint and pin assignment.Has matching physical dimensions, lead pitch, and package height.Preserves the exact electrical parameters (2V to 3.6V supply, 24mA drive strength, 5V-tolerant inputs, and -40°C to +85°C temperature range). | Identical 16-TSSOP pinout and footprint.Standard TSSOP-16 physical envelope matches perfectly.The 74LVC series is fully compatible with 74LCX logic levels and meets or exceeds all original electrical specifications. | ||
 AI Summary | MC74LCX157DT by onsemi: Multiplexer 4 x 2:1 16-TSSOP. | This is the direct, active replacement from onsemi (originally Fairchild line) and represents the easiest path forward because it shares the same 74LCX logic family characteristics and 16-TSSOP footprint.
| The SN74LVC157APWR is a highly reliable alternative from Texas Instruments that offers broader supply and temperature ranges while retaining complete pin-to-pin and logical compatibility.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Multiplexer 4 x 2:1 16-TSSOP | Multiplexer 4 x 2:1 16-TSSOP | Multiplexer 4 x 2:1 16-TSSOP | |
| Manufacturer | onsemi | onsemi | Texas Instruments | |
| Type | Logic | Logic | Logic | |
| Datasheet | Open | Open | Open | |
| Lead Time | 12 weeks | 26 weeks | 16 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0090 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Type | Multiplexer | - | - | |
| Circuit | 4 x 2:1 | - | - | |
| 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 |
|---|---|---|---|
 MC74LCX157DTGonsemi | In stock | Obsolete | 4Alternatives availableSee Alternatives |
| MC74VHC157DTR2onsemi | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 MC74LCX244DTonsemi | In stock | Obsolete | 5Alternatives availableSee Alternatives |
 MC74ACT241DTonsemi | In stock | Obsolete | 4Alternatives availableSee Alternatives |
| MC74HC541ADTonsemi | In stock | Obsolete | 6Alternatives availableSee Alternatives |
 MC74VHC1G05DFT1onsemi | In stock | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi MC74LCX157DT 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 MC74LCX157DT are the 74LCX157MTCX (onsemi) and the SN74LVC157APWR (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 MC74LCX157DT 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 MC74LCX157DT (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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