74LCX00M NAND Gate IC Equivalent & Substitute Parts

Part Overview

The 74LCX00M is a 4-channel 2-input NAND gate logic IC manufactured by onsemi, housed in a 14-SOIC surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74LCX00M operates across a 2V to 3.6V supply voltage range with low quiescent current consumption of 10 µA maximum, suitable for low-power digital logic applications requiring NAND gate functionality.

Key Parameters

Parameter	Value
Logic Type	NAND 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
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
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 74LCX00M are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Logic Type: NAND Gate with 4 channels and 2 inputs per channel
Package: 14-SOIC surface mount form factor
Supply Voltage Range: Minimum 2V operation capability
Output Current: 24mA drive capability on both high and low outputs
Propagation Delay: Maximum 5.5ns at 3.3V with 50pF load
Operating Temperature: Minimum -40°C to 85°C range
RoHS3 Compliance and MSL Level 1 rating

Substitutes are classified into two categories: onsemi 74LCX series parts (pin-compatible, same voltage range) and Texas Instruments 74LVC series parts (enhanced performance, extended voltage range, lower quiescent current). All listed substitutes maintain identical pinout and functional equivalence within their respective logic families.

Parameter Comparison

Part Number	Manufacturer	Series	Supply Voltage	Quiescent Current (Max)	Propagation Delay @ 3.3V, 50pF	Operating Temp	Package	Product Status	Automotive Grade
74LCX00M	onsemi	74LCX	2V ~ 3.6V	10 µA	5.2ns	-40°C ~ 85°C	14-SOIC	Obsolete	No
MC74LCX00DG	onsemi	74LCX	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 85°C	14-SOIC	Active	No
MC74LCX00DR2G	onsemi	74LCX	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 85°C	14-SOIC	Active	No
74LCX00YMTR	STMicroelectronics	74LCX	2V ~ 3.6V	10 µA	4.3ns	-40°C ~ 85°C	14-SOIC	Active	Yes (AEC-Q100)
SN74LVC00AD	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.1ns	-40°C ~ 125°C	14-SOIC	Active	No
SN74LVC00ADR	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.1ns	-40°C ~ 125°C	14-SOIC	Active	No
SN74LVC00ADT	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.1ns	-40°C ~ 125°C	14-SOIC	Active	No
74LVC00AD,118	Nexperia USA Inc.	74LVC	1.2V ~ 3.6V	40 µA	4.3ns	-40°C ~ 125°C	14-SOIC	Active	No
74LVC00AD-Q100J	Nexperia USA Inc.	74LVC	1.2V ~ 3.6V	40 µA	4.3ns	-40°C ~ 125°C	14-SOIC	Active	Yes (AEC-Q100)
SN74LVC00ANS	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.1ns	-40°C ~ 125°C	14-SOIC	Active	No
SN74LVC00ADRG4	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	4.1ns	-40°C ~ 125°C	14-SOIC	Discontinued at DiGi Electronics	No

Engineering Selection Recommendations

For direct replacement of the obsolete 74LCX00M, the MC74LCX00DG and MC74LCX00DR2G from onsemi provide identical electrical specifications and packaging, maintaining the same 2V to 3.6V supply voltage range and 10 µA quiescent current. Both are active products with ROHS3 compliance and MSL Level 1 rating.

The 74LCX00YMTR from STMicroelectronics offers the same 74LCX series electrical characteristics with improved propagation delay (4.3ns versus 5.2ns) and includes AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade components.

Texas Instruments 74LVC series substitutes (SN74LVC00AD, SN74LVC00ADR, SN74LVC00ADT, SN74LVC00ANS) provide enhanced performance with lower quiescent current (1 µA), faster propagation delay (4.1ns), and extended operating temperature range (-40°C to 125°C). These are suitable for applications where lower power consumption and wider temperature operation are beneficial. The SN74LVC00ADRG4 is discontinued at DiGi Electronics and should not be selected for new designs.

Nexperia 74LVC00AD,118 and 74LVC00AD-Q100J extend the minimum supply voltage to 1.2V, enabling ultra-low voltage applications. The 74LVC00AD-Q100J includes AEC-Q100 automotive qualification for automotive applications requiring extended voltage range operation.

Frequently Asked Questions (FAQ)

Q: Can the 74LCX00M be directly replaced with any 74LVC series part?

A: Yes, all listed 74LVC series parts are functionally equivalent and pin-compatible. The 74LVC series offers improved specifications including lower quiescent current, faster propagation delay, and extended operating temperature range. Verify that your application's supply voltage range is compatible; 74LVC parts operate down to 1.65V minimum (or 1.2V for Nexperia variants), while the original 74LCX00M requires minimum 2V.

Q: What is the difference between MC74LCX00DG and MC74LCX00DR2G?

A: Both parts are electrically identical onsemi 74LCX series NAND gates with identical specifications. The primary difference is packaging: MC74LCX00DG is supplied in Tube packaging, while MC74LCX00DR2G is supplied in Tape & Reel (TR) format. Select based on your procurement and assembly requirements.

Q: Is the 74LCX00YMTR suitable for automotive applications?

A: Yes, the 74LCX00YMTR from STMicroelectronics carries AEC-Q100 automotive qualification and is graded for automotive use. It maintains the same 74LCX electrical specifications as the original 74LCX00M while providing improved propagation delay performance.

Q: Why do Texas Instruments 74LVC parts have lower quiescent current?

A: The 74LVC series represents an enhanced logic family with improved power efficiency. Texas Instruments 74LVC00 variants specify 1 µA maximum quiescent current compared to 10 µA for the 74LCX series, making them suitable for battery-powered and low-power applications.

Q: Can I use 74LVC00AD,118 in a 2V supply application?

A: No. The 74LVC00AD,118 from Nexperia specifies a minimum supply voltage of 1.2V and maximum of 3.6V. While it operates at 2V, this is within its specified range. However, if your application requires guaranteed operation at exactly 2V with the original 74LCX00M specifications, use onsemi MC74LCX00DG or MC74LCX00DR2G, which specify 2V minimum.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive electronics qualification standard. Parts carrying this qualification (74LCX00YMTR and 74LVC00AD-Q100J) have undergone rigorous testing for reliability, temperature cycling, and performance consistency required for automotive applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original 74LCX00M specifications.

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