74LCX06MX Equivalent & Substitute Parts

Part Overview

The 74LCX06MX is a 6-channel inverter IC with open-drain outputs manufactured by onsemi in a 14-SOIC package. This part operates across a 2V to 3.6V supply voltage range and is designed for low-power logic applications. The 74LCX06MX is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain the same logic function, circuit count, and package footprint while offering extended availability and in some cases improved electrical performance.

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

Substitute parts for the 74LCX06MX are classified based on electrical and mechanical compatibility. The primary substitution criteria are:

Core Compatibility Parameters:

Logic Type: Inverter with 6 channels, 1 input per channel
Features: Open Drain output configuration
Package: 14-SOIC or 14-SO footprint (0.154" width compatible)
Supply Voltage Range: Must support minimum 2V operation
Output Current: Minimum 24mA sink capability
Input Logic Levels: 0.7V ~ 0.8V (Low), 1.7V ~ 2V (High)
Propagation Delay: Maximum 3.7ns @ 3.3V, 50pF
Operating Temperature: Minimum -40°C to +85°C range
Surface Mount: SOIC package format

Substitution Categories:

Parametric Equivalent: MC74LCX06DR2G (onsemi) — Identical electrical specifications and same manufacturer series, differentiated by packaging format (Tape & Reel vs. Cut Tape) and active product status.

Direct Manufacturer Equivalents: SN74LVC06ADR and SN74LVC06ADT (Texas Instruments) — Same base part number (74LVC06), identical package, meet all electrical requirements with extended supply voltage range (1.65V ~ 3.6V) and improved quiescent current (1 µA vs. 10 µA).

Cross-Manufacturer Alternatives: 74LVC06AS14-13 (Diodes Incorporated) and 74LVC06AD,118 (NXP USA Inc.) — Functionally equivalent with extended supply voltage range (1.65V ~ 5.5V or 1.2V ~ 5.5V), improved output current capability (32mA), and wider operating temperature range. Package dimensions vary slightly (0.209" width for some variants).

Automotive Grade Option: SN74LVC06AQDRG4Q1 (Texas Instruments) — AEC-Q100 qualified automotive-grade variant with identical electrical performance to standard industrial parts.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Voltage - Supply	Current - Quiescent (Max)	Current - Output High, Low	Max Propagation Delay @ V, Max CL	Operating Temperature	Package / Case	Packaging
74LCX06MX	onsemi	Obsolete	2V ~ 3.6V	10 µA	-, 24mA	3.7ns @ 3.3V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm)	Cut Tape (CT)
MC74LCX06DR2G	onsemi	Active	2V ~ 3.6V	10 µA	-, 24mA	3.7ns @ 3.3V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm)	Tape & Reel (TR)
74LVC06AS14-13	Diodes Incorporated	Active	1.65V ~ 5.5V	10 µA	-, 32mA	2.5ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Tape & Reel (TR)
SN74LVC06ADR	Texas Instruments	Active	1.65V ~ 3.6V	1 µA	-, 24mA	4.6ns @ 3.3V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Tape & Reel (TR)
SN74LVC06AD	Texas Instruments	Active	1.65V ~ 3.6V	1 µA	-, 24mA	4.6ns @ 3.3V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Tube
SN74LVC06ADT	Texas Instruments	Active	1.65V ~ 3.6V	1 µA	-, 24mA	4.6ns @ 3.3V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Tape & Reel (TR)
SN74LVC06AMDREP	Texas Instruments	Active	1.65V ~ 3.6V	1 µA	-, 24mA	4.6ns @ 3.3V, 50pF	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	-
SN74LVC06ANS	Texas Instruments	Active	1.65V ~ 3.6V	10 µA	-, 24mA	4.6ns @ 3.3V, 50pF	-55°C ~ 125°C	14-SOIC (0.209", 5.30mm)	-
SN74LVC06ANSR	Texas Instruments	Active	1.65V ~ 3.6V	1 µA	-, 24mA	4.6ns @ 3.3V, 50pF	-40°C ~ 125°C	14-SOIC (0.209", 5.30mm)	Tape & Reel (TR)
SN74LVC06AQDRG4Q1	Texas Instruments	Active	1.65V ~ 3.6V	10 µA	-, 24mA	3.7ns @ 3.3V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Tape & Reel (TR)
74LVC06AD,118	NXP USA Inc.	Active	1.2V ~ 5.5V	40 µA	-, 32mA	2.5ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Bulk

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement: SN74LVC06ADR or SN74LVC06ADT (Texas Instruments) — Both parts are active, meet all electrical requirements of the 74LCX06MX, and are available in Tape & Reel packaging suitable for production environments. The extended supply voltage range (1.65V ~ 3.6V) provides additional design margin, and the reduced quiescent current (1 µA) offers improved power efficiency. The 14-SOIC package footprint is identical to the original part.

Parametric Equivalent for Same-Manufacturer Continuity: MC74LCX06DR2G (onsemi) — Maintains the original manufacturer's product line with identical electrical specifications and the same 2V ~ 3.6V supply voltage range. This part is active and available in Tape & Reel format, providing direct functional equivalence with improved availability compared to the obsolete 74LCX06MX.

Extended Operating Temperature Option: SN74LVC06AMDREP (Texas Instruments) — Suitable for applications requiring extended temperature range (-55°C ~ 125°C). Electrical performance is identical to other SN74LVC06 variants with 1 µA quiescent current.

Automotive-Grade Application: SN74LVC06AQDRG4Q1 (Texas Instruments) — AEC-Q100 qualified for automotive applications. Maintains the same electrical performance as the standard industrial SN74LVC06 variants while meeting automotive qualification requirements.

Wide Supply Voltage Range Option: 74LVC06AS14-13 (Diodes Incorporated) or 74LVC06AD,118 (NXP USA Inc.) — Both support extended supply voltage range (1.65V ~ 5.5V or 1.2V ~ 5.5V) and offer improved output current capability (32mA). These parts are suitable for applications requiring operation across a broader voltage spectrum. Note that 74LVC06AD,118 is available in bulk packaging only.

Package Consideration: SN74LVC06ANS and SN74LVC06ANSR have a wider package body (0.209" vs. 0.154"), which may require PCB layout verification before substitution. These parts are functionally equivalent but have different physical dimensions.

Frequently Asked Questions (FAQ)

Q: Can the 74LCX06MX be directly replaced with any of the listed substitute parts? A: Yes, all listed parts are functionally equivalent inverter ICs with 6 channels and open-drain outputs in compatible 14-SOIC packages. However, verify package body width (0.154" vs. 0.209") and supply voltage requirements for your specific application before substitution.

Q: What is the key difference between the 74LCX06 and 74LVC06 series? A: The 74LVC06 series (Texas Instruments, Diodes Incorporated, NXP) supports a wider supply voltage range (1.65V ~ 3.6V or higher) compared to the 74LCX06 series (2V ~ 3.6V). Both maintain identical logic function, circuit count, and package format. The 74LVC06 variants typically offer lower quiescent current and extended operating temperature ranges.

Q: Is the MC74LCX06DR2G a true equivalent to the 74LCX06MX? A: Yes. The MC74LCX06DR2G is a parametric equivalent manufactured by onsemi with identical electrical specifications, supply voltage range, and operating temperature. The primary difference is packaging format (Tape & Reel vs. Cut Tape) and active product status.

Q: Which substitute part offers the best power efficiency? A: SN74LVC06ADR, SN74LVC06ADT, SN74LVC06AMDREP, and SN74LVC06ANSR all feature 1 µA quiescent current, compared to 10 µA for the original 74LCX06MX. These parts provide superior power efficiency for battery-powered or low-power applications.

Q: Can I use 74LVC06AS14-13 or 74LVC06AD,118 in a 2V supply application? A: 74LVC06AS14-13 supports 1.65V minimum supply voltage, which is below the 2V specification of the 74LCX06MX. 74LVC06AD,118 supports 1.2V minimum, also below 2V. Both parts will function at 2V, but verify input logic level thresholds for your specific signal levels, as the 74LVC06AD,118 has different input thresholds (0.12V ~ 0.8V Low, 1.08V ~ 2V High) compared to the original part.

Q: What is the significance of the AEC-Q100 qualification on the SN74LVC06AQDRG4Q1? A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This variant is suitable for automotive applications requiring certified components. Electrical performance is identical to standard industrial SN74LVC06 parts.

Q: Are there package footprint compatibility concerns? A: Most substitute parts use the standard 14-SOIC package with 0.154" body width, which is footprint-compatible with the 74LCX06MX. However, SN74LVC06ANS and SN74LVC06ANSR have a 0.209" body width. Verify PCB pad spacing and layout before using these variants as substitutes.

Q: Which substitute part has the fastest propagation delay? A: 74LVC06AS14-13 and 74LVC06AD,118 both offer 2.5ns propagation delay @ 5V, 50pF, compared to 3.7ns for the 74LCX06MX. However, at 3.3V operation, most SN74LVC06 variants provide 4.6ns delay, which is comparable to the original part.

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