74LCX06M Equivalent & Substitute Parts

Part Overview

The 74LCX06M is a 6-channel inverter logic IC with open-drain outputs manufactured by onsemi in a 14-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The 74LCX06M operates across a 2V to 3.6V supply voltage range with a maximum propagation delay of 3.7ns at 3.3V with 50pF load, suitable for low-voltage logic applications requiring open-drain output capability.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Open Drain
Voltage - Supply	2V ~ 3.6V
Current - Quiescent (Max)	10 µA
Current - Output High, Low	-, 24mA
Input Logic Level - Low	0.7V ~ 0.8V
Input Logic Level - High	1.7V ~ 2V
Max Propagation Delay @ V, Max CL	3.7ns @ 3.3V, 50pF
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 (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74LCX06M is determined by the following critical parameters: logic type (inverter), circuit count (6 channels), input count (1), open-drain output feature, package type (14-SOIC), and functional electrical characteristics including supply voltage range, propagation delay, and output current capability.

Substitute parts are grouped into three categories:

Parametric Equivalent: MC74LCX06DG (onsemi) maintains identical electrical specifications and 14-SOIC packaging, differing only in product status (active vs. obsolete) and packaging format (tube).

Direct Manufacturer Equivalent: SN74LVC06AD (Texas Instruments) provides the same logic function and package with enhanced specifications including lower quiescent current (1 µA vs. 10 µA), extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C), and faster propagation delay (4.6ns vs. 3.7ns). Supply voltage range is 1.65V to 3.6V, which encompasses the 74LCX06M range.

Similar Alternatives: Additional Texas Instruments and NXP variants (SN74LVC06ADR, SN74LVC06ADT, SN74LVC06ANS, SN74LVC06ANSR, SN74LVC06AMDREP, SN74LVC06AQDRQ1, SN74LVC06AQDRG4Q1) and NXP 74LVC06AD,118 maintain core functional equivalence with variations in packaging format, temperature rating, and automotive qualification grades.

Parameter Comparison

Parameter	74LCX06M (Main)	MC74LCX06DG	SN74LVC06AD	74LVC06AD,118 (NXP)	SN74LVC06ADR	SN74LVC06ADT
Manufacturer	onsemi	onsemi	Texas Instruments	NXP USA Inc.	Texas Instruments	Texas Instruments
Logic Type	Inverter	Inverter	Inverter	Inverter	Inverter	Inverter
Number of Circuits	6	6	6	6	6	6
Number of Inputs	1	1	1	1	1	1
Features	Open Drain	Open Drain	Open Drain	Open Drain	Open Drain	Open Drain
Voltage - Supply	2V ~ 3.6V	2V ~ 3.6V	1.65V ~ 3.6V	1.2V ~ 5.5V	1.65V ~ 3.6V	1.65V ~ 3.6V
Current - Quiescent (Max)	10 µA	10 µA	1 µA	40 µA	1 µA	1 µA
Current - Output High, Low	-, 24mA	-, 24mA	-, 24mA	-, 32mA	-, 24mA	-, 24mA
Input Logic Level - Low	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V	0.12V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V
Input Logic Level - High	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.08V ~ 2V	1.7V ~ 2V	1.7V ~ 2V
Max Propagation Delay @ V, Max CL	3.7ns @ 3.3V, 50pF	3.7ns @ 3.3V, 50pF	4.6ns @ 3.3V, 50pF	2.5ns @ 5V, 50pF	4.6ns @ 3.3V, 50pF	4.6ns @ 3.3V, 50pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement of the obsolete 74LCX06M, MC74LCX06DG from onsemi is the primary parametric equivalent, maintaining identical electrical specifications and 14-SOIC packaging while offering active product status and improved availability.

For applications requiring enhanced performance and extended temperature range, Texas Instruments SN74LVC06AD, SN74LVC06ADR, and SN74LVC06ADT are suitable alternatives. These parts deliver lower quiescent current (1 µA), faster propagation delay (4.6ns), and extended operating temperature to 125°C, all within the same 14-SOIC package footprint. Supply voltage compatibility is maintained within the 1.65V to 3.6V range.

For applications with broader supply voltage requirements (1.2V to 5.5V), NXP 74LVC06AD,118 provides extended voltage range capability with higher output current (32mA) and faster propagation delay (2.5ns at 5V), though quiescent current is elevated at 40 µA.

Automotive-grade variants SN74LVC06AQDRQ1 and SN74LVC06AQDRG4Q1 with AEC-Q100 qualification are available for automotive applications requiring functional equivalence with automotive reliability standards.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC06AD directly replace 74LCX06M in existing designs?

A: Yes. SN74LVC06AD maintains identical logic function, pin configuration, and 14-SOIC package. The supply voltage range of 1.65V to 3.6V encompasses the 74LCX06M specification of 2V to 3.6V. Enhanced specifications (lower quiescent current, faster propagation delay, extended temperature range) provide improved performance without functional incompatibility.

Q: What is the difference between 14-SOIC and 14-SO packages?

A: Both designations refer to 14-pin small-outline IC packages with surface mount configuration. Dimensional variations exist: standard 14-SOIC measures 0.154" (3.90mm) width, while some 14-SO variants measure 0.209" (5.30mm) width. Verify PCB footprint compatibility before substitution.

Q: Are automotive-grade variants (SN74LVC06AQDRQ1, SN74LVC06AQDRG4Q1) compatible with commercial applications?

A: Automotive-grade parts with AEC-Q100 qualification are functionally compatible with commercial applications. These variants undergo additional reliability testing and temperature cycling validation, making them suitable for both automotive and high-reliability commercial environments.

Q: What is the significance of quiescent current differences between 74LCX06M (10 µA) and SN74LVC06AD (1 µA)?

A: Lower quiescent current in SN74LVC06AD reduces standby power consumption by approximately 90%, beneficial for battery-powered or power-constrained applications. This represents an improvement over the 74LCX06M specification without introducing functional incompatibility.

Q: Can NXP 74LVC06AD,118 be used in applications designed for 2V to 3.6V operation?

A: Yes. The 74LVC06AD,118 supply voltage range of 1.2V to 5.5V encompasses the 2V to 3.6V specification. However, the elevated quiescent current (40 µA vs. 10 µA) and higher output current capability (32mA vs. 24mA) should be evaluated for power budget and thermal management considerations.

Q: What packaging formats are available for 74LVC06 logic inverters?

A: Available packaging includes 14-SOIC (standard surface mount), 14-SO (alternative surface mount with different width), Tube, Tape & Reel (TR), and Bulk formats. Selection depends on production volume, assembly equipment compatibility, and supply chain requirements.

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