74LCX00SJX Equivalent & Substitute Parts

Part Overview

The 74LCX00SJX is a NAND Gate IC with 4 channels and 2 inputs per channel, manufactured by onsemi in a 14-SOP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74LCX series operates at supply voltages between 2V and 3.6V with a maximum propagation delay of 5.2ns at 3.3V with 50pF load. Substitute parts from the 74LVC series provide functionally equivalent NAND gate logic with improved specifications and active product status.

Key Parameters

Parameter	74LCX00SJX
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
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
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74LCX00SJX is determined by the following critical parameters:

Logic function: 4-channel NAND gate with 2 inputs per channel
Supply voltage compatibility: Substitute parts must support the 2V to 3.6V range or broader
Output drive capability: 24mA minimum for both high and low states
Input logic thresholds: Compatible with TTL/CMOS logic levels
Propagation delay: Substitute parts must meet or exceed speed performance
Operating temperature range: Minimum -40°C to 85°C
Package compatibility: 14-pin SOIC form factor with equivalent pinout
Surface mount technology: All substitutes use surface mount packaging

The 74LVC00 series from Texas Instruments and Nexperia provides direct functional equivalence with enhanced electrical characteristics and active product status. All substitute parts maintain the same logic function, pin count, and package footprint compatibility.

Parameter Comparison

Parameter	74LCX00SJX (onsemi)	74LVC00AD,118 (Nexperia)	SN74LVC00AD (TI)	SN74LVC00ADR (TI)	SN74LVC00ADT (TI)	SN74LVC00ANS (TI)	SN74LVC00ANSR (TI)
Logic Type	NAND Gate	NAND Gate	NAND Gate	NAND Gate	NAND Gate	NAND Gate	NAND Gate
Number of Circuits	4	4	4	4	4	4	4
Number of Inputs	2	2	2	2	2	2	2
Voltage - Supply	2V ~ 3.6V	1.2V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Current - Quiescent (Max)	10 µA	40 µA	1 µA	1 µA	1 µA	1 µA	1 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.7V ~ 0.8V	0.12V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V
Input Logic Level - High	1.7V ~ 2V	1.08V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V
Max Propagation Delay @ 3.3V, 50pF	5.2ns	4.3ns	4.1ns	4.1ns	4.1ns	4.1ns	4.1ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.209", 5.30mm Width)	14-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the 74LCX00SJX and maintain ROHS3 compliance with MSL Level 1 rating. The primary distinction between substitutes is product status and package form factor.

Active Product Status Substitutes:

SN74LVC00AD, SN74LVC00ADR, SN74LVC00ADT, and SN74LVC00ANSR from Texas Instruments are all active products with extended operating temperature ranges (-40°C to 125°C) compared to the original 74LCX00SJX (-40°C to 85°C). These parts offer superior quiescent current performance (1 µA maximum) and faster propagation delay (4.1ns). The SN74LVC00AD and SN74LVC00ADR use the narrower 14-SOIC package (0.154", 3.90mm width), while SN74LVC00ANS and SN74LVC00ANSR use the wider 14-SOIC package (0.209", 5.30mm width) matching the original form factor.

Alternative Manufacturer:

The 74LVC00AD,118 from Nexperia USA Inc. is an active product with the narrower package form factor. It provides the broadest supply voltage range (1.2V to 3.6V) and maintains all required electrical specifications.

Packaging Considerations:

For designs requiring PCB layout compatibility with the original 74LCX00SJX, select parts with the 0.209" (5.30mm) package width: SN74LVC00ANS or SN74LVC00ANSR. For new designs without legacy constraints, the narrower 0.154" (3.90mm) package variants offer improved board density.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74LCX00SJX with any of the listed 74LVC00 substitutes?

A: Yes. All listed substitutes maintain identical logic function (4-channel NAND gate with 2 inputs), output drive capability (24mA), and pin configuration. The 74LVC series provides enhanced electrical performance with lower quiescent current and faster propagation delay.

Q: What is the difference between the package variants?

A: The 14-SOIC package comes in two widths. The original 74LCX00SJX uses 0.209" (5.30mm) width. Substitutes SN74LVC00ANS and SN74LVC00ANSR maintain this width for direct PCB compatibility. Alternatives like SN74LVC00AD and SN74LVC00ADR use a narrower 0.154" (3.90mm) package, which requires PCB layout modification but offers improved space efficiency.

Q: Are there supply voltage compatibility concerns?

A: The 74LCX00SJX operates at 2V to 3.6V. All listed substitutes support at least this range. Texas Instruments parts support 1.65V to 3.6V, and the Nexperia part supports 1.2V to 3.6V, providing broader compatibility with lower voltage systems.

Q: What is the temperature operating range difference?

A: The original 74LCX00SJX operates from -40°C to 85°C. All 74LVC00 substitutes extend this to -40°C to 125°C, providing enhanced thermal margin for demanding applications.

Q: Which substitute offers the best quiescent current performance?

A: Texas Instruments SN74LVC00 variants (AD, ADR, ADT, ANS, ANSR) and Nexperia 74LVC00AD,118 all offer 1 µA maximum quiescent current, significantly lower than the original 10 µA specification.

Q: What packaging options are available for high-volume procurement?

A: Texas Instruments offers Tape & Reel (TR) packaging in SN74LVC00ADR and SN74LVC00ANSR. Nexperia provides 74LVC00AD,118 in Tape & Reel. Texas Instruments SN74LVC00AD is available in Tube packaging. Select based on your assembly process requirements.

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