SN74HC126PW Equivalent & Substitute Parts

Part Overview

The SN74HC126PW is a non-inverting buffer IC from Texas Instruments, featuring 4 elements with 1 bit per element and 3-state output capability. This 14-TSSOP surface mount logic device operates across a 2V to 6V supply voltage range and is rated for -40°C to 85°C operating temperature. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

SN74HC126PW

Texas InstrumentsIn Stock: 1062SN74HC126PW Datasheet

Current PartRFQ

SN74HC126PWR

Texas InstrumentsIn Stock: 23449SN74HC126PWR Datasheet

DirectRFQ

74HC126PW,118

Nexperia USA Inc.In Stock: 326474HC126PW,118 Datasheet

MFR RecommendedRFQ

74HC126T14-13

Diodes IncorporatedIn Stock: 1789074HC126T14-13 Datasheet

MFR RecommendedRFQ

MC74HC126ADTR2G

onsemiIn Stock: 2900MC74HC126ADTR2G Datasheet

MFR RecommendedRFQ

MM74HC126MTCX

Fairchild SemiconductorIn Stock: 18618MM74HC126MTCX Datasheet

MFR RecommendedRFQ

MM74HC125MTC

Fairchild SemiconductorIn Stock: 3777MM74HC125MTC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC126PW is determined by the following critical parameters:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 4
• Output Type: 3-State
• Package / Case: 14-TSSOP
• Voltage - Supply: 2V ~ 6V
• Mounting Type: Surface Mount

Substitute parts must maintain identical logic function, element count, output configuration, and physical package dimensions. Output current specifications and operating temperature ranges may vary within acceptable engineering tolerances for the 74HC logic family. All substitutes listed are ROHS3 compliant and MSL 1 rated.

Parameter Comparison

Engineering Selection Recommendations

Primary Direct Substitute: SN74HC126PWR (Texas Instruments) is the active production equivalent of the discontinued SN74HC126PW, maintaining identical electrical specifications and output current ratings. This part is available in Tape & Reel packaging with substantial inventory.

Extended Temperature Range Options: 74HC126PW,118 (Nexperia) and 74HC126T14-13 (Diodes Incorporated) both support -40°C to 125°C operating temperature, providing enhanced thermal performance for applications requiring extended temperature operation. MC74HC126ADTR2G (onsemi) extends the lower temperature limit to -55°C for cryogenic or aerospace applications.

Packaging Considerations: SN74HC126PWR and 74HC126PW,118 are supplied in Tape & Reel format suitable for automated assembly. MM74HC126MTCX and MM74HC125MTC are available in Bulk packaging. All parts maintain 14-TSSOP surface mount package compatibility.

Output Current Specification: 74HC126T14-13 specifies 5.2mA output current versus 7.8mA for other substitutes. This reduced current rating is acceptable for applications with lower drive requirements but should be verified against circuit load specifications.

All listed substitutes maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SN74HC126PWR directly replace SN74HC126PW? A: Yes. SN74HC126PWR is the active production part from Texas Instruments with identical electrical specifications, logic function, element count, output type, and 14-TSSOP package. The primary difference is packaging format (Tape & Reel versus Tube) and product status (Active versus Discontinued).

Q: What is the difference between 74HC126 and 74HC125 devices? A: Both are non-inverting buffers with 4 elements and 3-state outputs in 14-TSSOP packages. MM74HC125MTC is listed as a parametric equivalent, indicating functional compatibility within the 74HC logic family, though the base product numbers differ.

Q: Are all substitutes compatible with the original 2V to 6V supply voltage range? A: Yes. All listed substitutes operate within the 2V to 6V supply voltage specification. Some substitutes support extended temperature ranges (-40°C to 125°C or -55°C to 125°C) but maintain the same voltage supply compatibility.

Q: Does packaging format affect electrical performance? A: No. Tape & Reel and Bulk packaging formats do not affect electrical performance. Packaging selection depends on assembly process requirements and inventory management. All parts in this list use identical 14-TSSOP surface mount packages.

Q: Which substitute offers the best availability? A: SN74HC126PWR (Texas Instruments) has the highest inventory at 23,405 pieces, followed by MM74HC126MTCX (Fairchild Semiconductor) at 18,574 pieces. Both are active production parts with substantial stock levels.

Q: Can I use 74HC126T14-13 if my application requires 7.8mA output current? A: 74HC126T14-13 specifies 5.2mA output current. Substitution is valid only if your circuit load requirements do not exceed 5.2mA per output. Verify load impedance and current draw specifications before selection.