74HCT126DB,112 Equivalent & Substitute Parts

Part Overview

The 74HCT126DB,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 component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement planning. The part operates within the 74HCT logic series and is housed in a 14-SSOP surface mount package.

Substiute Parts

74HCT126DB,112

Nexperia USA Inc.In Stock: 111274HCT126DB,112 Datasheet

Current PartRFQ

74HCT126PW,118

Nexperia USA Inc.In Stock: 336374HCT126PW,118 Datasheet

SimilarRFQ

SN74AHCT126DBR

Texas InstrumentsIn Stock: 4926SN74AHCT126DBR Datasheet

SimilarRFQ

74HCT125DB,112

Nexperia USA Inc.In Stock: 114674HCT125DB,112 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HCT126DB,112 are categorized based on strict electrical and mechanical parameter alignment:

Direct Substitutes (Identical Electrical Parameters, Package Variation):

• 74HCT126PW,118: Maintains identical logic function, element count, output type, current ratings, voltage supply range, and operating temperature. Differs only in package format (14-TSSOP vs. 14-SSOP) and is available in Tape & Reel packaging with active product status.

Cross-Manufacturer Substitute (Enhanced Current Rating, Identical Package):

• SN74AHCT126DBR: Manufactured by Texas Instruments, maintains identical logic function, element count, output type, voltage supply range, and operating temperature. Output current rating increased to 8mA (vs. 6mA). Package remains 14-SSOP with active product status.

Parametric Equivalent (Functional Variant, Identical Electrical Specifications):

• 74HCT125DB,112: Nexperia USA Inc. part with identical electrical parameters (current, voltage, temperature, package). Differs in base product number (74HCT125 vs. 74HCT126), indicating functional variation within the same logic family. Active product status.

Parameter Comparison

Engineering Selection Recommendations

For Direct Package Compatibility (14-SSOP): Select SN74AHCT126DBR or 74HCT125DB,112. Both maintain the 14-SSOP package footprint identical to the main part. SN74AHCT126DBR provides enhanced output current capability (8mA vs. 6mA), suitable for applications requiring higher drive capability. Both parts carry active product status and ROHS3 compliance.

For Nexperia Ecosystem Continuity: Select 74HCT126PW,118 or 74HCT125DB,112. Both are Nexperia USA Inc. products with active status. The 74HCT126PW,118 maintains identical electrical specifications but requires PCB layout adjustment due to 14-TSSOP package (narrower 4.40mm vs. 5.30mm width). The 74HCT125DB,112 offers identical package and electrical parameters with functional variation.

For Maximum Availability: SN74AHCT126DBR offers the highest inventory (4911 Pcs), followed by 74HCT126PW,118 (3339 Pcs). Both are active products with established supply chains.

All substitute options maintain ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can 74HCT126PW,118 replace 74HCT126DB,112 directly on the PCB? A: Electrical substitution is direct. However, the package differs: 74HCT126PW,118 uses 14-TSSOP (4.40mm width) versus 74HCT126DB,112 14-SSOP (5.30mm width). PCB footprint modification is required. Pin configuration remains identical.

Q: What is the advantage of SN74AHCT126DBR over the original part? A: SN74AHCT126DBR maintains identical package (14-SSOP) and electrical specifications except for output current, which increases from 6mA to 8mA. This provides enhanced drive capability for applications with higher load requirements. Product status is active with established supply availability.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (74HCT126PW,118, SN74AHCT126DBR, and 74HCT125DB,112) are ROHS3 compliant with MSL Level 1 rating, matching the original part specification.

Q: What is the functional difference between 74HCT126 and 74HCT125? A: Both are non-inverting buffers with 4 elements, 1 bit per element, and 3-state output. The base product number difference (126 vs. 125) indicates functional variation within the 74HCT logic family. Electrical parameters (current, voltage, temperature) remain identical. Consult device datasheets for specific functional distinctions.

Q: Which substitute offers the best long-term availability? A: SN74AHCT126DBR (Texas Instruments) and 74HCT126PW,118 (Nexperia) both carry active product status with substantial inventory levels (4911 Pcs and 3339 Pcs respectively), indicating established supply chains and long-term availability.

Q: Can I use 74HCT125DB,112 as a drop-in replacement? A: Electrical and package specifications are identical to the original part, enabling direct PCB substitution. Functional differences exist between 74HCT125 and 74HCT126 variants. Application-specific functional requirements must be evaluated before selection.