CD74HC125MT Equivalent & Substitute Parts

Part Overview

The CD74HC125MT is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 4 elements with 1 bit per element and 3-state output capability. The device operates across a 2V to 6V supply voltage range and is housed in a 14-SOIC surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD74HC125MT
Manufacturer	Texas Instruments
Logic Type	Buffer, Non-Inverting
Number of Elements	4
Number of Bits per Element	1
Output Type	3-State
Current - Output High, Low	7.8mA, 7.8mA
Voltage - Supply	2V ~ 6V
Operating Temperature	-55°C ~ 125°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD74HC125MT is determined by the following critical parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 4
Number of Bits per Element: 1
Output Type: 3-State
Voltage - Supply: 2V ~ 6V
Package / Case: 14-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Substitute parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications and package dimensions, differing only in packaging format (Tape & Reel vs. Cut Tape) or minor manufacturing variations.

Manufacturer Recommended Alternatives provide functionally equivalent performance with the same logic configuration but may originate from different manufacturers or have minor variations in operating temperature range or output current specifications.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Output Type	Current (mA)	Supply Voltage	Temp Range (°C)	Package	Product Status
CD74HC125MT	Texas Instruments	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Discontinued
CD74HC125M96	Texas Instruments	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Active
CD74HC126M96	Texas Instruments	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Active
CD74HC126MT	Texas Instruments	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Discontinued
74HC125D,653	Nexperia USA Inc.	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 125	14-SOIC	Active
74HC125S14-13	Diodes Incorporated	Buffer, Non-Inverting	4	3-State	5.2 / 5.2	2V ~ 6V	-40 ~ 125	14-SOIC	Active
MC74HC125ADG	Fairchild Semiconductor	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Active
MM74HC125M	Fairchild Semiconductor	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	14-SOIC	Active
MM74HC125MX	Fairchild Semiconductor	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	14-SOIC	Active
MC74HC125ADR2G	onsemi	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Active
MC74HC126ADR2G	onsemi	Buffer, Non-Inverting	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Active

Engineering Selection Recommendations

For applications requiring direct replacement of the discontinued CD74HC125MT, the following parts are recommended based on product status and compliance:

Primary Substitutes (Identical Specifications): CD74HC125M96 (Texas Instruments) and MC74HC125ADR2G (onsemi) provide full parametric equivalence with identical output current ratings (7.8mA), supply voltage range (2V ~ 6V), and operating temperature range (-55°C ~ 125°C). Both are ROHS3 compliant and currently in active production status.

Alternative Substitutes (Functional Equivalence): 74HC125D,653 (Nexperia USA Inc.) and 74HC125S14-13 (Diodes Incorporated) maintain functional equivalence with identical logic configuration and package. The Nexperia part matches the original output current specification, while the Diodes part operates at reduced output current (5.2mA). Both support the full 2V ~ 6V supply range and are ROHS3 compliant.

Temperature-Constrained Alternatives: MM74HC125M and MM74HC125MX (Fairchild Semiconductor) are suitable for applications with operating temperature requirements limited to -40°C ~ 85°C. These parts maintain identical output current and supply voltage specifications.

All substitute parts maintain the 14-SOIC surface mount package format and are ROHS3 compliant with MSL rating of 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q: Can CD74HC125M96 directly replace CD74HC125MT? A: Yes. CD74HC125M96 is a parametric equivalent with identical electrical specifications, output current (7.8mA), supply voltage range (2V ~ 6V), and operating temperature range (-55°C ~ 125°C). The primary difference is packaging format: CD74HC125M96 is supplied in Cut Tape & Digi-Reel format, while CD74HC125MT uses Tape & Reel packaging.

Q: What is the difference between CD74HC125 and CD74HC126 variants? A: Both CD74HC125 and CD74HC126 are non-inverting buffers with identical electrical specifications and package format. The primary distinction lies in the base product number designation. For the CD74HC125MT application, CD74HC125-based substitutes (CD74HC125M96, MC74HC125ADR2G) are preferred. CD74HC126 variants (CD74HC126M96, CD74HC126MT, MC74HC126ADR2G) are functionally equivalent but use a different base product designation.

Q: Are there output current differences among substitute parts? A: Most substitutes maintain the original 7.8mA output current specification. The exception is 74HC125S14-13 (Diodes Incorporated), which operates at 5.2mA output current. This reduced current capability may affect drive capability in high-current applications.

Q: What is the operating temperature range difference between substitutes? A: The original CD74HC125MT operates from -55°C ~ 125°C. Most active substitutes (CD74HC125M96, MC74HC125ADR2G, MC74HC126ADR2G) maintain this range. Nexperia (74HC125D,653) and Diodes (74HC125S14-13) variants operate from -40°C ~ 125°C. Fairchild parts (MM74HC125M, MM74HC125MX) are limited to -40°C ~ 85°C. Select substitutes based on application temperature requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), matching the original CD74HC125MT specifications.

Q: What packaging formats are available for substitutes? A: Substitute parts are available in Tape & Reel (TR), Cut Tape (CT) & Digi-Reel, and Bulk packaging formats. Verify packaging compatibility with your procurement and assembly processes before selection.

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