74LCX04M Equivalent & Substitute Parts Reference

Part Overview

The 74LCX04M is a 6-channel inverter logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part operates across a 2V to 3.6V supply voltage range with 10 µA maximum quiescent current and 5.2ns propagation delay at 3.3V with 50pF load. The 74LCX04M is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain the same logic function, pin configuration, and electrical performance within the 14-SOIC package footprint.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage Supply Range	2V ~ 3.6V
Current - Quiescent (Max)	10 µA
Current - Output High/Low	24mA / 24mA
Input Logic Level - Low	0.7V ~ 0.8V
Input Logic Level - High	1.7V ~ 2V
Max Propagation Delay @ 3.3V, 50pF	5.2ns
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Requirements:

Logic function: 6-channel inverter with single input per channel
Package type: 14-SOIC surface mount
Output drive capability: 24mA minimum for both high and low states
Supply voltage overlap: Minimum 2V to 3.6V range compatibility
Input logic thresholds: Compatible with standard TTL/CMOS levels
Propagation delay: Maximum 5.2ns at 3.3V, 50pF load
Compliance: ROHS3 compliant, MSL 1 rating

Substitute Categories:

Direct Series Equivalents (74LCX04 series): onsemi parts maintaining identical electrical specifications and temperature range extensions
Cross-Manufacturer Equivalents (74LVC04 series): Texas Instruments and NXP parts with enhanced specifications (lower quiescent current, wider voltage range, extended temperature range)
Packaging Variants: Same electrical performance across different packaging formats (Tube, Tape & Reel, Bulk)

Parameter Comparison

Part Number	Manufacturer	Series	Voltage Supply	Quiescent Current (Max)	Propagation Delay @ 3.3V, 50pF	Operating Temperature	Package	Product Status
74LCX04M	onsemi	74LCX	2V ~ 3.6V	10 µA	5.2ns	-40°C ~ 85°C	14-SOIC	Obsolete
MC74LCX04DR2G	onsemi	74LCX	2V ~ 3.6V	10 µA	5.2ns	-55°C ~ 125°C	14-SOIC	Active
MC74LCX04DG	onsemi	74LCX	2V ~ 3.6V	10 µA	5.2ns	-55°C ~ 125°C	14-SOIC	Active
SN74LVC04AD	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.3ns	-40°C ~ 125°C	14-SOIC	Active
SN74LVC04ADR	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.3ns	-40°C ~ 125°C	14-SOIC	Active
SN74LVC04ADRG3	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.3ns	-40°C ~ 125°C	14-SOIC	Active
SN74LVC04ADT	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.3ns	-40°C ~ 125°C	14-SOIC	Active
SN74LVC04ANS	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.3ns	-40°C ~ 125°C	14-SO	Active
SN74LVC04ANSR	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.3ns	-40°C ~ 125°C	14-SO	Active
74LVC04AD,118	NXP Semiconductors	74LVC	Not specified	Not specified	Not specified	Not specified	Not specified	Active
74LVCU04AD,118	NXP Semiconductors	74LVCU	Not specified	Not specified	Not specified	Not specified	Not specified	Active

Engineering Selection Recommendations

For Active Production Designs:

Select from the Texas Instruments 74LVC04 series (SN74LVC04AD, SN74LVC04ADR, SN74LVC04ADRG3, SN74LVC04ADT) or onsemi 74LCX04 series (MC74LCX04DR2G, MC74LCX04DG). All are ROHS3 compliant with MSL 1 rating. Texas Instruments parts offer superior specifications: lower quiescent current (1 µA vs 10 µA), faster propagation delay (4.3ns vs 5.2ns), and extended temperature range (-40°C to 125°C vs -55°C to 125°C for onsemi).

For Supply Chain Continuity:

onsemi MC74LCX04DR2G and MC74LCX04DG maintain electrical equivalence to the obsolete 74LCX04M while offering extended operating temperature range and active product status. These parts preserve the 74LCX series lineage with identical voltage supply and output drive specifications.

Packaging Considerations:

14-SOIC (0.154", 3.90mm width) is the standard package for direct substitution. Texas Instruments SN74LVC04ANS and SN74LVC04ANSR use 14-SO (0.209", 5.30mm width) with identical electrical performance but different physical footprint; these require PCB layout verification before selection.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC04 series parts as direct replacements for 74LCX04M?

A: Yes. Both series are 6-channel inverters in 14-SOIC packaging with compatible logic thresholds, output drive capability (24mA), and propagation delay performance. The 74LVC04 series offers improved specifications (lower quiescent current, faster delay) and extended temperature range, making them suitable for direct substitution in applications operating within the 74LCX04M's original specifications.

Q: What is the difference between MC74LCX04DR2G and MC74LCX04DG?

A: Both are onsemi 74LCX04 series parts with identical electrical specifications. MC74LCX04DR2G is packaged in Tape & Reel format, while MC74LCX04DG is packaged in Tube format. Selection depends on assembly process requirements and volume needs.

Q: Are SN74LVC04ANS and SN74LVC04ANSR compatible with the 14-SOIC footprint?

A: No. These parts use 14-SO packaging (0.209", 5.30mm width) instead of 14-SOIC (0.154", 3.90mm width). While electrically equivalent, they require different PCB footprints and cannot be used as direct drop-in replacements without layout modification.

Q: What is the minimum supply voltage for 74LVC04 series substitutes?

A: Texas Instruments 74LVC04 series operates from 1.65V to 3.6V, extending the lower voltage limit compared to the 74LCX04M (2V minimum). This provides additional design flexibility for low-voltage applications while maintaining full compatibility with 2V to 3.6V systems.

Q: Do all substitute parts meet ROHS3 compliance?

A: Yes. All recommended substitute parts are ROHS3 compliant with MSL 1 rating, matching the environmental and regulatory requirements of the original 74LCX04M.

Q: What is the propagation delay difference between 74LCX04 and 74LVC04 series?

A: The 74LCX04M has 5.2ns maximum propagation delay at 3.3V with 50pF load. Texas Instruments 74LVC04 series achieves 4.3ns under identical conditions, representing approximately 17% faster switching performance. This improvement does not affect compatibility in applications designed for the original part's timing specifications.

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