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74LVC126ADB,118 Equivalent & Substitute Parts
Part Overview
The 74LVC126ADB,118 is a non-inverting buffer IC manufactured by Nexperia USA Inc., featuring 4 elements with 1 bit per element and 3-state output capability. This component operates across a supply voltage range of 1.2V to 3.6V and is housed in a 14-SSOP package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| 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) |
| Mounting Type | Surface Mount |
| Package / Case | 14-SSOP (0.209", 5.30mm Width) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the 74LVC126ADB,118 is determined by the following critical parameters:
- Logic Function: Buffer, Non-Inverting with 4 elements, 1 bit per element, 3-state output
- Electrical Specifications: Output current (24mA), supply voltage range, and operating temperature range
- Package Compatibility: Physical form factor and pin configuration
- Compliance: RoHS3 compliance and MSL rating
Substitute parts are grouped into two categories based on package type:
Category 1 - Same Package (14-SSOP): Parts maintaining the identical 14-SSOP form factor with equivalent electrical performance.
Category 2 - Alternative Package (14-TSSOP/14-TVSOP): Parts with identical logic function and electrical specifications but in smaller footprint packages (14-TSSOP or 14-TVSOP), suitable for designs where package size optimization is acceptable.
Category 3 - Cross-Manufacturer (74LCX Series): Parts from alternative manufacturers with compatible logic function but with modified supply voltage range (2V minimum instead of 1.2V).
Parameter Comparison
| Part Number | Manufacturer | Package / Case | Voltage - Supply | Operating Temperature | Current - Output (High/Low) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|
| 74LVC126ADB,118 | Nexperia USA Inc. | 14-SSOP (0.209", 5.30mm) | 1.2V ~ 3.6V | -40°C ~ 125°C | 24mA, 24mA | Obsolete | ROHS3 Compliant |
| 74LVC126APW,118 | Nexperia USA Inc. | 14-TSSOP (0.173", 4.40mm) | 1.2V ~ 3.6V | -40°C ~ 125°C | 24mA, 24mA | Active | ROHS3 Compliant |
| 74LCX126MTCX | Fairchild Semiconductor | 14-TSSOP (0.173", 4.40mm) | 2V ~ 3.6V | -40°C ~ 85°C | 24mA, 24mA | Active | Not Specified |
| CLVC126AQPWRG4Q1 | Texas Instruments | 14-TSSOP (0.173", 4.40mm) | 1.65V ~ 3.6V | -40°C ~ 125°C | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVC126ADBR | Texas Instruments | 14-SSOP (0.209", 5.30mm) | 1.65V ~ 3.6V | -40°C ~ 125°C | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVC126ADGVR | Texas Instruments | 14-TVSOP (0.173", 4.40mm) | 1.65V ~ 3.6V | -40°C ~ 125°C | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVC126APW | Texas Instruments | 14-TSSOP (0.173", 4.40mm) | 1.65V ~ 3.6V | -40°C ~ 125°C | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVC126APWR | Texas Instruments | 14-TSSOP (0.173", 4.40mm) | 1.65V ~ 3.6V | -40°C ~ 125°C | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVC126APWRG4 | Texas Instruments | 14-TSSOP (0.173", 4.40mm) | 1.65V ~ 3.6V | -40°C ~ 125°C | 24mA, 24mA | Discontinued at DiGi Electronics | ROHS3 Compliant |
| SN74LVC126APWT | Texas Instruments | 14-TSSOP (0.173", 4.40mm) | 1.65V ~ 3.6V | -40°C ~ 125°C | 24mA, 24mA | Active | ROHS3 Compliant |
Engineering Selection Recommendations
For Direct Package Replacement (14-SSOP):
SN74LVC126ADBR from Texas Instruments is the primary substitute for the obsolete 74LVC126ADB,118. Both parts maintain the 14-SSOP package footprint, identical output current specifications (24mA), and full operating temperature range (-40°C to 125°C). The SN74LVC126ADBR has an active product status with ROHS3 compliance and unlimited MSL rating, ensuring long-term availability and regulatory compliance.
For Package-Optimized Designs (14-TSSOP):
When PCB space optimization is acceptable, multiple active alternatives exist in the 14-TSSOP package:
- SN74LVC126APWR (Texas Instruments, Tape & Reel, 24,300 pcs inventory)
- SN74LVC126APWT (Texas Instruments, Tape & Reel, 3,100 pcs inventory)
- SN74LVC126APW (Texas Instruments, Tube packaging, 2,200 pcs inventory)
- 74LVC126APW,118 (Nexperia USA Inc., Tape & Reel, 5,326 pcs inventory)
All maintain the 1.65V to 3.6V supply voltage range and full temperature specification. The Nexperia part extends the lower supply voltage to 1.2V, matching the original specification.
For Automotive Applications:
CLVC126AQPWRG4Q1 from Texas Instruments is qualified to AEC-Q100 automotive standards with active product status, suitable for automotive-grade designs requiring buffer functionality.
For Cross-Manufacturer Compatibility:
74LCX126MTCX from Fairchild Semiconductor provides an alternative with identical logic function and output current. Note the reduced operating temperature range (-40°C to 85°C) and minimum supply voltage of 2V, which may limit applicability in designs requiring extended low-voltage operation.
Frequently Asked Questions (FAQ)
Q: Can I use SN74LVC126ADBR as a direct replacement for 74LVC126ADB,118?
A: Yes. Both parts share the 14-SSOP package, identical output current (24mA), and full operating temperature range (-40°C to 125°C). The SN74LVC126ADBR has active product status with ROHS3 compliance, making it suitable for direct substitution in existing designs.
Q: What is the difference between 14-SSOP and 14-TSSOP packages?
A: The 14-SSOP package has a width of 0.209" (5.30mm), while the 14-TSSOP package is narrower at 0.173" (4.40mm). Both are surface-mount packages with identical pin counts and configurations. The TSSOP variant allows for more compact PCB layouts but requires design verification for footprint compatibility.
Q: Why does 74LCX126MTCX have a different operating temperature range?
A: The 74LCX126MTCX is specified for -40°C to 85°C operation, compared to the -40°C to 125°C range of the original part. This reduced range may limit its use in applications requiring extended high-temperature operation. Verify application requirements before selection.
Q: Is the supply voltage range difference between parts significant?
A: The original 74LVC126ADB,118 operates from 1.2V to 3.6V. Most Texas Instruments substitutes operate from 1.65V to 3.6V, and the Fairchild 74LCX126MTCX operates from 2V to 3.6V. If your design operates below 1.65V, select the Nexperia 74LVC126APW,118 or verify that your application voltage remains within the substitute part's specification.
Q: What packaging options are available for high-volume procurement?
A: SN74LVC126APWR offers the highest inventory (24,300 pcs) in Tape & Reel packaging, suitable for automated assembly. Alternative high-inventory options include 74LVC126APW,118 (5,326 pcs) and SN74LVC126ADBR (5,200 pcs), both in Tape & Reel format.
Q: Are all substitute parts RoHS3 compliant?
A: All listed substitutes from Nexperia and Texas Instruments are ROHS3 compliant. The Fairchild 74LCX126MTCX does not specify RoHS status in the provided data. Verify compliance requirements for your application before final selection.
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