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74LVC126APW,112 Equivalent & Substitute Parts
Part Overview
The 74LVC126APW,112 is a non-inverting buffer logic IC manufactured by Nexperia USA Inc., featuring 4 elements with 1 bit per element and 3-state output capability. This device operates across a supply voltage range of 1.2V to 3.6V and is housed in a 14-TSSOP surface mount package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74LVC126APW,112 |
| Manufacturer | Nexperia USA Inc. |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 4 |
| Number of Bits per Element | 1 |
| Output Type | 3-State |
| Current - Output High, Low | 24mA, 24mA |
| Voltage - Supply | 1.2V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Package / Case | 14-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the 74LVC126APW,112 are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:
- Logic type: Buffer, Non-Inverting
- Number of elements: 4
- Number of bits per element: 1
- Output type: 3-State
- Output current capability: 24mA (high and low)
- Package type: 14-TSSOP or compatible surface mount packages
- Operating temperature range: -40°C to 125°C minimum
- Supply voltage compatibility: Minimum 1.2V to 3.6V overlap
Substitute parts are grouped into two categories:
Category 1: Direct Package Match (14-TSSOP) Parts maintaining identical 14-TSSOP packaging with full electrical parameter compatibility.
Category 2: Alternative Package (14-SSOP, 14-TVSOP) Parts with equivalent electrical specifications but different surface mount package footprints, requiring PCB layout adjustment.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Elements | Output Type | Current (mA) | Supply Voltage | Temp Range | Package | Status |
|---|---|---|---|---|---|---|---|---|---|
| 74LVC126APW,112 | Nexperia USA Inc. | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.2V ~ 3.6V | -40°C ~ 125°C | 14-TSSOP | Obsolete |
| 74LVC126AT14-13 | Diodes Incorporated | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Active |
| 74LCX126MTCX | Fairchild Semiconductor | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 2V ~ 3.6V | -40°C ~ 85°C | 14-TSSOP | Active |
| CLVC126AQPWRG4Q1 | Texas Instruments | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 3.6V | -40°C ~ 125°C | 14-TSSOP | Active |
| SN74LVC126ADBR | Texas Instruments | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 3.6V | -40°C ~ 125°C | 14-SSOP | Active |
| SN74LVC126ADGVR | Texas Instruments | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 3.6V | -40°C ~ 125°C | 14-TVSOP | Active |
| SN74LVC126APW | Texas Instruments | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 3.6V | -40°C ~ 125°C | 14-TSSOP | Active |
| SN74LVC126APWR | Texas Instruments | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 3.6V | -40°C ~ 125°C | 14-TSSOP | Active |
| SN74LVC126APWRG4 | Texas Instruments | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 3.6V | -40°C ~ 125°C | 14-TSSOP | Discontinued at DiGi Electronics |
| SN74LVC126APWT | Texas Instruments | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 3.6V | -40°C ~ 125°C | 14-TSSOP | Active |
Engineering Selection Recommendations
Primary Recommendation: SN74LVC126APWR (Texas Instruments)
This part offers the best combination of active product status, full electrical compatibility, identical 14-TSSOP packaging, and extended temperature range matching the original specification. ROHS3 compliance and unlimited moisture sensitivity level align with the original part's environmental ratings.
Secondary Recommendation: 74LVC126AT14-13 (Diodes Incorporated)
This active part maintains 14-TSSOP packaging and full temperature range support. The extended supply voltage range (1.65V ~ 5.5V) provides additional design margin beyond the original 1.2V ~ 3.6V specification.
Alternative for Automotive Applications: CLVC126AQPWRG4Q1 (Texas Instruments)
This variant includes AEC-Q100 automotive qualification and maintains identical electrical specifications and 14-TSSOP packaging. Suitable for designs requiring automotive-grade components.
Package Alternative: SN74LVC126ADBR (Texas Instruments)
When 14-SSOP packaging is acceptable, this part provides active status and full electrical compatibility. PCB layout modification is required due to different package footprint dimensions (0.209" vs. 0.173" width).
Not Recommended: 74LCX126MTCX (Fairchild Semiconductor)
While electrically compatible in the 2V ~ 3.6V overlap range, the reduced operating temperature range (-40°C ~ 85°C) does not meet the original -40°C ~ 125°C specification.
Frequently Asked Questions (FAQ)
Q: Can SN74LVC126APWR directly replace 74LVC126APW,112 without PCB modification?
A: Yes. Both parts use identical 14-TSSOP packaging with matching pin assignments. Electrical specifications are fully compatible within the 1.2V ~ 3.6V supply range. No PCB layout changes are required.
Q: What is the difference between 74LVC126AT14-13 and SN74LVC126APWR?
A: Both parts are functionally equivalent with identical 14-TSSOP packaging and -40°C ~ 125°C operating range. The primary difference is manufacturer (Diodes Incorporated vs. Texas Instruments) and supply voltage range (1.65V ~ 5.5V vs. 1.65V ~ 3.6V). The Diodes part offers wider voltage tolerance.
Q: Why is 74LCX126MTCX not recommended as a direct substitute?
A: The 74LCX126MTCX has a reduced operating temperature range of -40°C ~ 85°C, which does not meet the original specification of -40°C ~ 125°C. Use only if your application operates within the narrower temperature range.
Q: Can I use SN74LVC126ADBR if my PCB layout supports 14-SSOP packaging?
A: Yes. The SN74LVC126ADBR is electrically equivalent and maintains active product status. The 14-SSOP package has a larger width (0.209" vs. 0.173"), requiring PCB footprint adjustment. Verify pin spacing compatibility before layout modification.
Q: Is CLVC126AQPWRG4Q1 suitable for non-automotive applications?
A: Yes. The CLVC126AQPWRG4Q1 is a qualified automotive part but functions identically to standard 74LVC126 variants. It can be used in non-automotive designs and offers the benefit of automotive-grade reliability and testing.
Q: What is the difference between SN74LVC126APWR and SN74LVC126APWT?
A: Both parts are electrically identical with 14-TSSOP packaging and -40°C ~ 125°C operating range. The difference is packaging format: APWR is supplied in Tape & Reel (TR), while APWT is also supplied in Tape & Reel (TR). Both are active products suitable for production use.
Q: Why is the original 74LVC126APW,112 marked as obsolete?
A: Nexperia has discontinued this specific variant. Active equivalents from Texas Instruments (SN74LVC126APWR) and Diodes Incorporated (74LVC126AT14-13) provide identical functionality and are recommended for new designs and ongoing production.
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