CD74HC125M Equivalent & Substitute Parts

Part Overview

The CD74HC125M 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	CD74HC125M
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 CD74HC125M is determined by strict equivalence across 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
Base Product Number: 74HC125 or 74HC126

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents maintain identical electrical specifications and packaging, differing only in packaging format (tube, tape & reel, or cut tape).

Parametric Equivalents share all critical electrical and functional parameters but may have minor variations in output current specifications or operating temperature ranges.

Manufacturer Recommended Alternatives are functionally equivalent parts from different manufacturers that meet the same electrical and mechanical requirements.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Output Current (mA)	Supply Voltage	Temp Range (°C)	Package	Product Status	RoHS Status
CD74HC125M	Texas Instruments	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Discontinued	ROHS3
CD74HC125M96	Texas Instruments	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Active	ROHS3
MC74HC125ADR2G	onsemi	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Active	ROHS3
MM74HC125M	Fairchild Semiconductor	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-40 ~ 85	14-SOIC	Active	Not specified
74HC125D,653	Nexperia USA Inc.	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-40 ~ 125	14-SO	Active	ROHS3
74HC125S14-13	Diodes Incorporated	Buffer, Non-Inverting	4	5.2 / 5.2	2V ~ 6V	-40 ~ 125	14-SO	Active	ROHS3
MM74HC125MX	Fairchild Semiconductor	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-40 ~ 85	14-SOIC	Active	Not specified
NLV74HC125ADR2G	onsemi	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Obsolete	ROHS3
MC74HC125ADG	Fairchild Semiconductor	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Active	Not specified
CD74HC126M	Harris Corporation	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Obsolete	Non-compliant
MC74HC126ADG	onsemi	Buffer, Non-Inverting	4	7.8 / 7.8	2V ~ 6V	-55 ~ 125	14-SOIC	Obsolete	ROHS3

Engineering Selection Recommendations

Primary Recommendation: CD74HC125M96

CD74HC125M96 is the direct equivalent from Texas Instruments with identical electrical specifications and 14-SOIC packaging. This part maintains Active product status and ROHS3 compliance, making it the preferred direct replacement for the discontinued CD74HC125M.

Secondary Recommendations: MC74HC125ADR2G and MC74HC125ADG

MC74HC125ADR2G from onsemi and MC74HC125ADG from Fairchild Semiconductor are parametric equivalents with matching electrical performance across all critical parameters. Both maintain the full -55°C to 125°C operating temperature range and ROHS3 compliance. MC74HC125ADR2G is currently Active, while MC74HC125ADG is also Active and available in bulk packaging.

Alternative Consideration: 74HC125D,653

The Nexperia USA Inc. part 74HC125D,653 is functionally equivalent with Active product status and ROHS3 compliance. Operating temperature range is -40°C to 125°C, which is suitable for most applications. Package designation is 14-SO, which is mechanically compatible with 14-SOIC footprints.

Limited Substitution: 74HC125S14-13

Diodes Incorporated part 74HC125S14-13 is functionally equivalent but features reduced output current specifications (5.2mA versus 7.8mA). This part is suitable only for applications where lower output current is acceptable. Operating temperature range is -40°C to 125°C.

Avoid: Obsolete Parts

CD74HC126M, NLV74HC125ADR2G, and MC74HC126ADG are obsolete or have non-compliant RoHS status and should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can I use CD74HC125M96 as a direct replacement for CD74HC125M?

A: Yes. CD74HC125M96 is the direct equivalent from Texas Instruments with identical electrical specifications, operating temperature range, and 14-SOIC packaging. The only difference is packaging format (cut tape & digi-reel versus tube).

Q: What is the difference between 74HC125 and 74HC126 base product numbers?

A: Both are non-inverting buffers with 4 elements and 3-state output. The 74HC126 variants listed are parametric equivalents with identical electrical performance. However, 74HC126 parts in this list are obsolete and should not be used for new designs.

Q: Are the Fairchild Semiconductor parts (MM74HC125M, MM74HC125MX, MC74HC125ADG) suitable replacements?

A: Yes, these parts are functionally equivalent with matching output current (7.8mA) and supply voltage range (2V ~ 6V). However, operating temperature range is limited to -40°C to 85°C compared to the original -55°C to 125°C. Verify application temperature requirements before selection.

Q: Why does 74HC125S14-13 have lower output current (5.2mA)?

A: This is a specification difference from Diodes Incorporated. The part remains functionally equivalent for logic-level buffering applications. Verify that your circuit design does not require the higher 7.8mA output current before substitution.

Q: Is the 14-SO package from Nexperia compatible with 14-SOIC footprints?

A: Yes. The 14-SO and 14-SOIC packages are mechanically compatible with the same 0.154" (3.90mm) width and pin spacing. Both are surface mount packages suitable for the same PCB footprints.

Q: Which substitute part has the best availability?

A: CD74HC125M96 from Texas Instruments has 2946 pieces in stock. MC74HC125ADR2G from onsemi has 10400 pieces available. Both are Active products with strong inventory levels.

Q: Are all recommended parts ROHS3 compliant?

A: CD74HC125M96, MC74HC125ADR2G, 74HC125D,653, 74HC125S14-13, and MC74HC125ADG are ROHS3 compliant. MM74HC125M and MM74HC125MX do not specify RoHS status. Verify compliance requirements for your application before final selection.

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