CD74HCT14M Equivalent & Substitute Parts

Part Overview

The CD74HCT14M is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Texas Instruments in a 14-SOIC surface mount package. This logic component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part operates within the 74HCT logic family standard, which defines compatible electrical and mechanical parameters across multiple manufacturers.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Schmitt Trigger
Voltage Supply Range	4.5V ~ 5.5V
Package Type	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C (main part)
Input Logic Level - Low	0.5V ~ 0.6V
Input Logic Level - High	1.9V ~ 2.1V
Current - Output High, Low	4mA, 4mA

Substitute Part Grouping Explanation

Substitute parts for the CD74HCT14M are qualified based on the following criteria:

Primary Substitution Criteria:

Identical logic type (Inverter) and circuit configuration (6 channels, 1 input per channel)
Schmitt trigger input feature
Matching supply voltage range (4.5V ~ 5.5V)
Compatible package type (14-SOIC)
Matching input logic levels (0.5V ~ 0.6V low, 1.9V ~ 2.1V high)
Output current capability (4mA minimum for both high and low states)

Secondary Considerations:

Propagation delay performance (specifications vary by manufacturer)
Quiescent current consumption (1 µA to 2 µA range acceptable)
Operating temperature range (extended or standard grade)
Product status and availability
RoHS compliance and regulatory certifications

Parts that deviate from primary criteria (such as the 74HCT251D,652 multiplexer) are not suitable substitutes despite sharing the 74HCT family designation and package format.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Logic Type	Circuits	Voltage Supply	Quiescent Current (Max)	Output Current (High/Low)	Propagation Delay @ 4.5V/5V	Operating Temp	Package	Product Status	RoHS Status
CD74HCT14M	Texas Instruments	Inverter	6	4.5V ~ 5.5V	2 µA	4mA, 4mA	38ns @ 4.5V	-55°C ~ 125°C	14-SOIC	Discontinued	ROHS3 Compliant
CD74HCT14M96	Harris Corporation	Inverter	6	4.5V ~ 5.5V	2 µA	4mA, 4mA	38ns @ 4.5V	-55°C ~ 125°C	14-SOIC	Obsolete	Non-compliant
MC74HCT14ADR2G	onsemi	Inverter	6	4.5V ~ 5.5V	1 µA	4mA, 4mA	32ns @ 5V	-55°C ~ 125°C	14-SOIC	Active	ROHS3 Compliant
74HCT14D,653	Nexperia USA Inc.	Inverter	6	4.5V ~ 5.5V	2 µA	4mA, 4mA	34ns @ 4.5V	-40°C ~ 125°C	14-SOIC	Active	ROHS3 Compliant
74HCT14D-Q100,118	Nexperia USA Inc.	Inverter	6	4.5V ~ 5.5V	2 µA	4mA, 4mA	34ns @ 4.5V	-40°C ~ 125°C	14-SOIC	Active	ROHS3 Compliant
74HCT14S14-13	Diodes Incorporated	Inverter	6	4.5V ~ 5.5V	20 µA	4mA, 4mA	34ns @ 4.5V	-40°C ~ 125°C	14-SOIC	Active	ROHS3 Compliant
MC74HCT14ADG	onsemi	Inverter	6	4.5V ~ 5.5V	1 µA	4mA, 4mA	32ns @ 5V	-55°C ~ 125°C	14-SOIC	Active	ROHS3 Compliant
MM74HCT14M	Fairchild Semiconductor	Inverter	6	4.5V ~ 5.5V	1 µA	4.8mA, 4.8mA	20ns @ 5V	-40°C ~ 85°C	14-SOIC	Active	Not specified
MM74HCT14MX	Fairchild Semiconductor	Inverter	6	4.5V ~ 5.5V	1 µA	4.8mA, 4.8mA	20ns @ 5V	-40°C ~ 85°C	14-SOIC	Active	Not specified

Engineering Selection Recommendations

Preferred Substitutes (Active Status, ROHS3 Compliant):

MC74HCT14ADR2G and MC74HCT14ADG (onsemi) are the primary recommended substitutes. Both parts maintain full electrical compatibility with the CD74HCT14M while offering improved quiescent current performance (1 µA vs. 2 µA) and faster propagation delay (32ns @ 5V). Both are ROHS3 compliant and actively manufactured. MC74HCT14ADR2G is supplied in Tape & Reel packaging, while MC74HCT14ADG is supplied in Tube packaging. Both support the extended temperature range (-55°C ~ 125°C) matching the original part.

74HCT14D,653 and 74HCT14D-Q100,118 (Nexperia USA Inc.) are secondary alternatives with active product status and ROHS3 compliance. These parts maintain identical electrical specifications to the CD74HCT14M with slightly improved propagation delay (34ns @ 4.5V). The 74HCT14D-Q100,118 variant includes AEC-Q100 automotive qualification. Operating temperature range is reduced to -40°C ~ 125°C.

Alternative Substitute (Active Status, Higher Quiescent Current):

74HCT14S14-13 (Diodes Incorporated) is electrically compatible but exhibits elevated quiescent current consumption (20 µA vs. 2 µA). This part is suitable for applications where power consumption is not a critical constraint. ROHS3 compliance and active manufacturing status are confirmed.

Not Recommended:

CD74HCT14M96 (Harris Corporation) is obsolete and RoHS non-compliant, making it unsuitable for new designs despite electrical equivalence.

MM74HCT14M and MM74HCT14MX (Fairchild Semiconductor) have restricted operating temperature range (-40°C ~ 85°C) compared to the CD74HCT14M (-55°C ~ 125°C), limiting applicability in extended temperature environments.

Frequently Asked Questions (FAQ)

Q: Can I use MC74HCT14ADR2G as a direct replacement for CD74HCT14M?

A: Yes. Both parts are 6-channel inverters with Schmitt trigger inputs in 14-SOIC packages. Electrical specifications including supply voltage (4.5V ~ 5.5V), input logic levels, and output current are identical. MC74HCT14ADR2G is actively manufactured and ROHS3 compliant, making it a suitable direct substitute.

Q: What is the difference between MC74HCT14ADR2G and MC74HCT14ADG?

A: Both parts are electrically identical onsemi 74HCT14 inverters with matching performance specifications. The primary difference is packaging: MC74HCT14ADR2G is supplied in Tape & Reel format for automated assembly, while MC74HCT14ADG is supplied in Tube format for manual handling or lower-volume applications.

Q: Why is the 74HCT14S14-13 listed as a substitute if it has higher quiescent current?

A: The 74HCT14S14-13 meets all primary substitution criteria: identical logic type, circuit configuration, supply voltage, input logic levels, and package format. The elevated quiescent current (20 µA vs. 2 µA) does not prevent functional substitution but may impact power consumption in battery-powered or low-power applications. Selection depends on application requirements.

Q: Can I use MM74HCT14M in a circuit requiring -55°C operation?

A: No. MM74HCT14M has a minimum operating temperature of -40°C, which does not meet the extended temperature requirement of the CD74HCT14M (-55°C ~ 125°C). Use MC74HCT14ADR2G, MC74HCT14ADG, or Nexperia parts for full temperature range compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: No. CD74HCT14M96 is RoHS non-compliant. MM74HCT14M and MM74HCT14MX do not specify RoHS status. For new designs requiring RoHS compliance, use MC74HCT14ADR2G, MC74HCT14ADG, 74HCT14D,653, 74HCT14D-Q100,118, or 74HCT14S14-13.

Q: What is the significance of the AEC-Q100 qualification on 74HCT14D-Q100,118?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This variant is suitable for automotive applications requiring formal qualification documentation. Non-automotive applications can use any of the listed substitutes.

Q: Can I mix different manufacturers' parts in the same circuit board?

A: Yes. All listed substitute parts meet the same 74HCT logic family electrical specifications and package format. Mixing manufacturers is acceptable from a functional standpoint, though design documentation should reflect the specific part numbers used.

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