74HCU04DR2G Equivalent & Substitute Parts

Part Overview

The 74HCU04DR2G is a 6-channel inverter logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part operates across a 2V to 6V supply voltage range and is designed for general-purpose logic inversion applications. The device is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	5.2mA, 5.2mA
Input Logic Level - Low	0.3V ~ 1.1V
Input Logic Level - High	1.7V ~ 4.8V
Max Propagation Delay @ 6V, 50pF	12ns
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74HCU04DR2G is determined by the following critical parameters: logic type (inverter), circuit count (6 channels), input count (1 per channel), supply voltage range (2V ~ 6V), package type (14-SOIC), and mounting method (surface mount). Parts are grouped into three categories based on electrical and packaging compatibility:

Direct Equivalents maintain identical electrical specifications including quiescent current, output current, propagation delay, and operating temperature range. These parts are pin-compatible and functionally interchangeable without circuit modification.

Parametric Equivalents meet the core functional requirements but may have minor variations in quiescent current or propagation delay within acceptable operating margins. These parts are suitable for applications where the 74HCU04DR2G specifications are not at design limits.

Similar Parts share the same logic function and package but may originate from different manufacturers or have different product status classifications. These parts maintain electrical compatibility within the specified parameter ranges.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply	Current - Quiescent (Max)	Current - Output High, Low	Max Propagation Delay @ 6V, 50pF	Operating Temperature	Package	Packaging Type
74HCU04DR2G	onsemi	Obsolete	2V ~ 6V	2 µA	5.2mA, 5.2mA	12ns	-55°C ~ 125°C	14-SOIC	Tube
MC74HCU04ADR2G	onsemi	Active	2V ~ 6V	1 µA	5.2mA, 5.2mA	12ns	-55°C ~ 125°C	14-SOIC	Tape & Reel (TR)
CD74HCU04M	Texas Instruments	Last Time Buy	2V ~ 6V	2 µA	5.2mA, 5.2mA	12ns	-55°C ~ 125°C	14-SOIC	Tube
MM74HCU04M	onsemi	Active	2V ~ 6V	2 µA	5.2mA, 7.8mA	14ns	-40°C ~ 85°C	14-SOIC	Tube
MM74HCU04MX	Fairchild Semiconductor	Active	2V ~ 6V	2 µA	5.2mA, 7.8mA	14ns	-40°C ~ 85°C	14-SOIC	Not specified
SN74HCU04DR	Texas Instruments	Active	2V ~ 6V	2 µA	5.2mA, 5.2mA	14ns	-40°C ~ 85°C	14-SOIC	Tape & Reel (TR)
SN74HCU04D	Texas Instruments	Last Time Buy	2V ~ 6V	2 µA	5.2mA, 5.2mA	14ns	-40°C ~ 85°C	14-SOIC	Tube
SN74HCU04DT	Texas Instruments	Last Time Buy	2V ~ 6V	2 µA	5.2mA, 5.2mA	14ns	-40°C ~ 85°C	14-SOIC	Tape & Reel (TR)
CD74HC04MT	Texas Instruments	Discontinued at DiGi Electronics	2V ~ 6V	2 µA	5.2mA, 5.2mA	14ns	-55°C ~ 125°C	14-SOIC	Cut Tape (CT) & Digi-Reel®
74HCU04D,652	NXP Semiconductors	Active	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Bulk
74HCU04D,653	NXP Semiconductors	Active	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Bulk

Engineering Selection Recommendations

Primary Recommendation: MC74HCU04ADR2G

The MC74HCU04ADR2G is the preferred substitute for the obsolete 74HCU04DR2G. This part is manufactured by onsemi with active product status and maintains identical electrical specifications including 12ns propagation delay and -55°C to 125°C operating temperature range. The quiescent current is reduced to 1 µA, providing improved power efficiency. Packaging is Tape & Reel (TR), suitable for automated assembly processes. RoHS3 compliance is confirmed.

Secondary Recommendation: CD74HCU04M

The CD74HCU04M from Texas Instruments provides direct electrical equivalence with identical specifications across all critical parameters. Product status is Last Time Buy, indicating limited availability. This part is supplied in Tube packaging and maintains full compatibility with the original 74HCU04DR2G design. RoHS3 compliance is confirmed.

Alternative Recommendation: SN74HCU04DR

The SN74HCU04DR from Texas Instruments is an active product with identical electrical specifications to the main part. Operating temperature range is reduced to -40°C to 85°C, which is acceptable for most commercial and industrial applications. This part is supplied in Tape & Reel packaging and is suitable for high-volume production. RoHS3 compliance is confirmed.

Extended Temperature Applications: CD74HC04MT

For applications requiring the full -55°C to 125°C operating temperature range, the CD74HC04MT from Texas Instruments provides equivalent thermal performance. This part uses the 74HC logic family rather than 74HCU, with input logic levels of 0.5V to 1.8V (high) and 1.5V to 4.2V (low), which are compatible with standard CMOS logic levels. Product status is Discontinued at DiGi Electronics, indicating limited future availability.

Parametric Alternatives: MM74HCU04M and MM74HCU04MX

The MM74HCU04M (onsemi) and MM74HCU04MX (Fairchild Semiconductor) are active products with compatible electrical specifications. Operating temperature range is reduced to -40°C to 85°C. Output low current is increased to 7.8mA, and propagation delay is 14ns at 6V with 50pF load. These parts are suitable for applications where extended temperature performance is not required.

NXP Bulk Options: 74HCU04D,652 and 74HCU04D,653

NXP Semiconductors offers 74HCU04D variants in bulk packaging with active product status. Detailed electrical specifications are not provided in the available data. These parts are suitable for high-volume procurement where detailed parameter verification can be conducted directly with the manufacturer.

Frequently Asked Questions (FAQ)

Q: Can the MC74HCU04ADR2G directly replace the 74HCU04DR2G without circuit modification?

A: Yes. The MC74HCU04ADR2G maintains identical electrical specifications including supply voltage range (2V ~ 6V), output current (5.2mA), propagation delay (12ns @ 6V, 50pF), and operating temperature range (-55°C ~ 125°C). Pin configuration and package type (14-SOIC) are identical. No circuit modification is required.

Q: What is the difference between Tape & Reel and Tube packaging?

A: Tape & Reel packaging is used for automated pick-and-place assembly processes and is standard for high-volume production. Tube packaging is used for manual assembly or lower-volume applications. Both packaging types contain the same die and are electrically identical. Selection depends on assembly process requirements.

Q: Why is the 74HCU04DR2G listed as obsolete?

A: The 74HCU04DR2G has been discontinued by onsemi. Active alternatives from multiple manufacturers (onsemi, Texas Instruments, Fairchild Semiconductor, NXP Semiconductors) are available with equivalent or superior specifications. Procurement should transition to active product alternatives.

Q: Are there differences between 74HCU and 74HC logic families?

A: The 74HCU family uses unbuffered CMOS logic with input logic levels of 0.3V ~ 1.1V (low) and 1.7V ~ 4.8V (high). The 74HC family uses buffered CMOS logic with input logic levels of 0.5V ~ 1.8V (low) and 1.5V ~ 4.2V (high). The 74HC family is more tolerant of slower input transitions. Both families are compatible in most applications but should be verified for specific input signal characteristics.

Q: What does RoHS3 compliance mean?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the part does not contain restricted substances including lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers. This certification is required for products sold in the European Union and many other markets.

Q: Can I use a part with a reduced operating temperature range (-40°C ~ 85°C) instead of the full range (-55°C ~ 125°C)?

A: Only if your application operates within the reduced temperature range. Verify the minimum and maximum operating temperatures of your system. If your system requires operation below -40°C or above 85°C, select a part with the full -55°C ~ 125°C range such as MC74HCU04ADR2G or CD74HCU04M.

Q: What is the significance of quiescent current specifications?

A: Quiescent current is the supply current consumed when the device is not switching. Lower quiescent current reduces power consumption in battery-powered or low-power applications. The MC74HCU04ADR2G has 1 µA quiescent current compared to 2 µA for the original part, providing improved efficiency with identical functional performance.

Q: Are NXP 74HCU04D variants (652 and 653) suitable replacements?

A: NXP variants are active products with the same base part number and logic function. However, detailed electrical specifications are not provided in the available data. Contact NXP directly or consult the device datasheet to verify parameter compatibility before design implementation.

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