74HC126T14-13 Equivalent & Substitute Parts

Part Overview

The 74HC126T14-13 is a non-inverting buffer logic IC manufactured by Diodes Incorporated, designed for 3-state output applications in the 74HC series. This surface-mount component operates across a 2V to 6V supply range with 4 buffer elements, each providing 1 bit per element functionality. The part is currently active in production with 17,800 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers' versions offer improved availability, or when specific operational temperature ranges or compliance certifications are required for particular applications.

Key Parameters

Parameter	Specification
Logic Type	Buffer, Non-Inverting
Number of Elements	4
Output Type	3-State
Voltage Supply Range	2V ~ 6V
Current Output (High/Low)	5.2mA / 5.2mA
Operating Temperature	-40°C ~ 125°C
Package Type	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC126T14-13 is determined by the following critical parameters:

Core Functional Parameters:

Logic type (Buffer, Non-Inverting)
Number of elements (4)
Output type (3-State)
Supply voltage range (2V ~ 6V minimum)
Package type (14-TSSOP)

Performance Parameters:

Output current capability (5.2mA minimum for direct substitution; 7.8mA acceptable for higher-drive applications)
Operating temperature range (-40°C minimum; -55°C to 125°C extends operational envelope)

Compliance Parameters:

RoHS3 compliance
REACH status
Moisture sensitivity level (MSL 1)

Substitute parts are grouped by manufacturer and packaging configuration. Parts with identical electrical specifications and package dimensions are direct functional equivalents. Parts with higher output current ratings (7.8mA) remain compatible but provide enhanced drive capability. Temperature range variations are noted where they differ from the primary part.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Logic Type	Elements	Output Current (mA)	Temp Range (°C)	Packaging	Product Status	Inventory (Pcs)
74HC126T14-13	Diodes Incorporated	Buffer, Non-Inverting	4	5.2 / 5.2	-40 ~ 125	Tape & Reel	Active	17,800
74HC125T14-13	Diodes Incorporated	Buffer, Non-Inverting	4	5.2 / 5.2	-40 ~ 125	Tape & Reel	Active	3,571
74HC126PW,118	Nexperia USA Inc.	Buffer, Non-Inverting	4	7.8 / 7.8	-40 ~ 125	Tape & Reel	Active	3,245
MC74HC126ADTR2G	onsemi	Buffer, Non-Inverting	4	7.8 / 7.8	-55 ~ 125	Tape & Reel	Active	2,793
MM74HC126MTCX	Fairchild Semiconductor	Buffer, Non-Inverting	4	7.8 / 7.8	-40 ~ 85	Bulk	Active	18,574
SN74HC126PWR	Texas Instruments	Buffer, Non-Inverting	4	7.8 / 7.8	-40 ~ 85	Tape & Reel	Active	23,405
NLV74HC126ADTR2G	onsemi	Buffer, Non-Inverting	4	7.8 / 7.8	-55 ~ 125	Cut Tape & Digi-Reel	Obsolete	2,914
SN74HC126PW	Texas Instruments	Buffer, Non-Inverting	4	7.8 / 7.8	-40 ~ 85	Unspecified	Discontinued	1,020
SN74HC126PWT	Texas Instruments	Buffer, Non-Inverting	4	7.8 / 7.8	-40 ~ 85	Tape & Reel	Discontinued	2,099

Engineering Selection Recommendations

For Active Production Applications: Select from parts with Active product status: 74HC125T14-13, 74HC126PW,118, MC74HC126ADTR2G, MM74HC126MTCX, or SN74HC126PWR. All maintain ROHS3 compliance and MSL 1 rating.

For Extended Temperature Range Requirements: MC74HC126ADTR2G and NLV74HC126ADTR2G both support -55°C to 125°C operating range, compared to the primary part's -40°C to 125°C. MC74HC126ADTR2G is preferred due to Active status.

For Maximum Availability: SN74HC126PWR (Texas Instruments) offers the highest inventory level at 23,405 units with Active status and Tape & Reel packaging.

For Identical Electrical Specifications: 74HC125T14-13 (Diodes Incorporated) matches the primary part's 5.2mA output current rating and -40°C to 125°C temperature range, providing direct functional equivalence.

For Discontinued or Obsolete Parts: Avoid NLV74HC126ADTR2G (Obsolete status) and SN74HC126PW/SN74HC126PWT (Discontinued at DiGi Electronics) for new designs unless legacy system compatibility is required.

Frequently Asked Questions (FAQ)

Q: Can I substitute 74HC126PW,118 for 74HC126T14-13 directly? A: Yes. Both parts share identical logic type, element count, output type, supply voltage range, and package dimensions. The 74HC126PW,118 provides higher output current (7.8mA vs. 5.2mA), which is compatible with applications designed for the primary part.

Q: What is the difference between 74HC126T14-13 and 74HC125T14-13? A: Both are non-inverting buffers with 4 elements, 3-state output, and identical electrical specifications from Diodes Incorporated. The primary difference is the base product number (74HC126 vs. 74HC125), which may reflect internal design variations. Both are functionally equivalent for this application.

Q: Why do some substitute parts have higher output current ratings? A: Parts from Nexperia, onsemi, Texas Instruments, and Fairchild specify 7.8mA output current compared to Diodes Incorporated's 5.2mA. This reflects manufacturer-specific characterization and does not indicate incompatibility. Higher current capability is a superset of lower-current requirements.

Q: Can I use MC74HC126ADTR2G in applications requiring -40°C to 85°C operation? A: Yes. MC74HC126ADTR2G supports -55°C to 125°C, which encompasses the -40°C to 85°C range. Extended temperature capability does not restrict operation within narrower ranges.

Q: What packaging differences exist among substitute parts? A: Most parts use Tape & Reel (TR) packaging. MM74HC126MTCX uses Bulk packaging. NLV74HC126ADTR2G uses Cut Tape & Digi-Reel. All maintain the same 14-TSSOP physical package (0.173", 4.40mm width), ensuring PCB footprint compatibility.

Q: Are all substitute parts RoHS3 compliant? A: All active and discontinued parts listed are ROHS3 compliant. NLV74HC126ADTR2G (Obsolete) is also ROHS3 compliant. Compliance status is consistent across the substitute group.

Q: Which substitute part should I choose for automotive applications? A: NLV74HC126ADTR2G carries AEC-Q100 automotive qualification and supports -55°C to 125°C operation. However, this part is Obsolete. For active automotive-grade alternatives, consult manufacturer datasheets for AEC-Q100 qualified versions of active parts.

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