74LCX08MX AND Gate IC Equivalent & Substitute Parts

Part Overview

The 74LCX08MX is a 4-channel 2-input AND gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The 74LCX08MX operates across a 2V to 3.6V supply voltage range with low quiescent current and is compliant with RoHS3 and REACH standards.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	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	5.5ns
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 74LCX08MX are classified based on electrical parameter compatibility and packaging equivalence. The primary substitution criteria are:

Electrical Compatibility Parameters:

Logic type (AND Gate, 4 channels, 2 inputs per channel)
Supply voltage range overlap with 2V ~ 3.6V minimum requirement
Output current capability (24mA minimum for both high and low states)
Propagation delay performance at 3.3V, 50pF load
Input logic level thresholds
Operating temperature range

Packaging Compatibility:

14-SOIC surface mount package with 0.154" (3.90mm) width
Pin-compatible footprint

Compliance Requirements:

RoHS3 compliance
MSL rating of 1 or equivalent

Substitute parts are grouped into three categories: parametric equivalents (identical electrical specifications), direct manufacturers (functionally equivalent with enhanced specifications), and similar parts (compatible with minor parameter variations).

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Quiescent Current (Max)	Propagation Delay @ 3.3V, 50pF	Operating Temp	Product Status	Packaging
74LCX08MX	onsemi	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 85°C	Obsolete	Cut Tape (CT) & Digi-Reel®
MC74LCX08DR2G	onsemi	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 85°C	Active	Tape & Reel (TR)
74LVC08AS14-13	Diodes Incorporated	1.65V ~ 5.5V	10 µA	3.9ns	-40°C ~ 125°C	Active	Tape & Reel (TR)
SN74LVC08ADR	Texas Instruments	1.65V ~ 3.6V	1 µA	3.9ns	-40°C ~ 125°C	Active	Cut Tape (CT) & Digi-Reel®
74LVC08AD,118	Nexperia USA Inc.	1.2V ~ 3.6V	40 µA	4.1ns	-40°C ~ 125°C	Active	Tape & Reel (TR)
SN74LVC08AD	Texas Instruments	1.65V ~ 3.6V	1 µA	3.9ns	-40°C ~ 125°C	Active	Tube
SN74LVC08ADRG3	Texas Instruments	1.65V ~ 3.6V	1 µA	3.9ns	-40°C ~ 125°C	Active	Tape & Reel (TR)
SN74LVC08ADT	Texas Instruments	1.65V ~ 3.6V	1 µA	3.9ns	-40°C ~ 125°C	Active	Tape & Reel (TR)
SN74LVC08AMDREP	Texas Instruments	2V ~ 3.6V	10 µA	4.1ns	-55°C ~ 125°C	Active	Tape & Reel (TR)
SN74LVC08ANS	Texas Instruments	1.65V ~ 3.6V	10 µA	3.9ns	-40°C ~ 125°C	Active	-
SN74LVC08ANSR	Texas Instruments	1.65V ~ 3.6V	1 µA	3.9ns	-40°C ~ 125°C	Active	Tape & Reel (TR)

Engineering Selection Recommendations

Parametric Equivalent (Recommended Primary Substitute): MC74LCX08DR2G from onsemi provides identical electrical specifications to the 74LCX08MX with active product status. This part maintains the same supply voltage range (2V ~ 3.6V), quiescent current (10 µA), and propagation delay (5.5ns). The primary difference is packaging format (Tape & Reel vs. Cut Tape), which does not affect electrical compatibility. This option is preferred for designs requiring minimal specification changes.

Direct Manufacturer Alternatives (Enhanced Performance): SN74LVC08ADR and SN74LVC08ADRG3 from Texas Instruments offer improved performance characteristics including lower quiescent current (1 µA vs. 10 µA) and faster propagation delay (3.9ns vs. 5.5ns). Both parts maintain compatibility with the 2V ~ 3.6V supply range and support extended operating temperature to 125°C. SN74LVC08ADR is available in Cut Tape packaging, matching the original part's distribution format.

Extended Temperature Range Option: SN74LVC08AMDREP extends the operating temperature range to -55°C ~ 125°C while maintaining the original quiescent current specification (10 µA) and supply voltage range (2V ~ 3.6V). This part is suitable for applications requiring enhanced low-temperature performance.

Broad Supply Voltage Compatibility: 74LVC08AS14-13 from Diodes Incorporated supports the widest supply voltage range (1.65V ~ 5.5V) and offers faster propagation delay (3.9ns). This part is applicable in systems with variable supply voltages or future design flexibility requirements.

All recommended substitutes maintain RoHS3 compliance, MSL rating of 1, and 14-SOIC surface mount packaging with 0.154" width, ensuring direct footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use 74LVC08 series parts as direct replacements for the 74LCX08MX? A: Yes. The 74LVC08 series parts listed are electrically compatible substitutes. The 74LVC designation indicates low-voltage CMOS technology with enhanced specifications compared to the 74LCX series. All listed 74LVC08 variants maintain the same logic function (4-channel 2-input AND gate), pin count, and 14-SOIC package footprint. Verify that the supply voltage range of the selected 74LVC08 part encompasses your circuit's operating voltage.

Q: What is the difference between MC74LCX08DR2G and 74LCX08MX? A: These parts are electrically identical. Both are manufactured by onsemi with the same 74LCX series specifications: 2V ~ 3.6V supply, 10 µA quiescent current, and 5.5ns propagation delay. The primary difference is product status (MC74LCX08DR2G is active; 74LCX08MX is obsolete) and packaging format (Tape & Reel vs. Cut Tape). MC74LCX08DR2G is the recommended replacement for the obsolete 74LCX08MX.

Q: Why do some substitute parts have lower quiescent current specifications? A: The 74LVC08 series from Texas Instruments (SN74LVC08ADR, SN74LVC08ADRG3, SN74LVC08ANSR) specify 1 µA quiescent current compared to 10 µA for the 74LCX08MX. This represents improved power efficiency in the 74LVC technology generation. Lower quiescent current reduces standby power consumption without affecting logic performance or output drive capability.

Q: Are all substitute parts available in the same packaging format? A: No. The 74LCX08MX is supplied in Cut Tape (CT) & Digi-Reel® format. Substitute parts are available in multiple packaging formats: Tape & Reel (TR), Cut Tape (CT), and Tube. For automated assembly processes, select parts specified as Tape & Reel. For manual assembly or lower-volume applications, Cut Tape or Tube packaging may be appropriate. All parts maintain the same 14-SOIC (0.154", 3.90mm width) footprint.

Q: Can I use SN74LVC08AD in Tube packaging for production assembly? A: Tube packaging is suitable for manual assembly and lower-volume production. For high-volume automated pick-and-place assembly, Tape & Reel packaging (SN74LVC08ADRG3, SN74LVC08ADT, SN74LVC08ANSR) is the standard format. Verify your assembly equipment's compatibility with the selected packaging format before procurement.

Q: What is the significance of the extended temperature range in SN74LVC08AMDREP? A: SN74LVC08AMDREP operates from -55°C to 125°C, compared to -40°C to 85°C for the 74LCX08MX. The extended low-temperature specification (-55°C vs. -40°C) is required for applications in aerospace, military, or extreme environmental conditions. The extended high-temperature specification (125°C vs. 85°C) supports high-reliability industrial applications. Select this part only if your application requires these extended temperature specifications.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed are RoHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity level), matching the compliance profile of the 74LCX08MX. This ensures compatibility with modern manufacturing processes and environmental regulations.

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