74LCX08SJ AND Gate IC Equivalent & Substitute Parts

Part Overview

The 74LCX08SJ is a 4-channel 2-input AND gate logic IC manufactured by onsemi in 14-SOP packaging. This part is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The 74LCX08SJ operates across a 2V to 3.6V supply voltage range with low quiescent current and is suitable for low-power logic applications requiring AND gate functionality.

Key Parameters

Parameter	74LCX08SJ
Manufacturer	onsemi
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 (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74LCX08SJ are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain the same logic type (AND Gate), circuit count (4 channels), and input configuration (2 inputs per channel).

Electrical Compatibility: Substitute parts must support the 3.3V nominal operating voltage of the original part and maintain compatible input/output logic levels and current drive capabilities (24mA output).

Package Compatibility: Substitute parts are grouped by physical package type. The 74LCX08SJ uses 14-SOIC (0.209", 5.30mm Width) packaging. Substitutes in the same package footprint are directly interchangeable. Substitutes in alternative 14-SOIC packages (0.154", 3.90mm Width) or 14-SO packages require PCB layout verification.

Product Status: Active substitute parts are preferred over obsolete alternatives to ensure long-term availability and supply chain continuity.

Compliance: All substitute parts maintain REACH Unaffected status and EAR99 classification consistent with the original part.

Parameter Comparison

Parameter	74LCX08SJ	74LVC08AD,118	SN74LVC08AD	SN74LVC08ADR	SN74LVC08ADT	SN74LVC08ANS	SN74LVC08ANSR	SN74LVC08AQDREP
Manufacturer	onsemi	Nexperia USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Series	74LCX	74LVC	74LVC	74LVC	74LVC	74LVC	74LVC	74LVC
Logic Type	AND Gate	AND Gate	AND Gate	AND Gate	AND Gate	AND Gate	AND Gate	AND Gate
Number of Circuits	4	4	4	4	4	4	4	4
Number of Inputs	2	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	2V ~ 3.6V
Current - Quiescent (Max)	10 µA	40 µA	1 µA	1 µA	1 µA	10 µA	1 µA	10 µA
Current - Output High, Low	24mA, 24mA	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	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	2V
Max Propagation Delay @ 3.3V, 50pF	5.5ns	4.1ns	3.9ns	3.9ns	3.9ns	3.9ns	3.9ns	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	-40°C ~ 125°C
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)	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	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)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and REACH Unaffected status, providing superior supply chain continuity compared to the obsolete 74LCX08SJ.

Package-Matched Substitutes (Direct PCB Compatibility): SN74LVC08ANS and SN74LVC08ANSR maintain the original 14-SOIC (0.209", 5.30mm Width) package footprint. These parts require no PCB layout modifications and are the preferred substitutes for existing designs.

Alternative Package Substitutes (PCB Layout Verification Required): SN74LVC08AD, SN74LVC08ADR, SN74LVC08ADT, 74LVC08AD,118, and SN74LVC08AQDREP use the narrower 14-SOIC (0.154", 3.90mm Width) package. These parts are electrically compatible but require PCB layout verification due to different physical dimensions.

Performance Characteristics: Texas Instruments SN74LVC08 variants (SN74LVC08AD, SN74LVC08ADR, SN74LVC08ADT, SN74LVC08ANSR) offer improved propagation delay (3.9ns) and reduced quiescent current (1 µA) compared to the original part. SN74LVC08ANS and 74LVC08AD,118 provide moderate improvements in propagation delay while maintaining quiescent current levels closer to the original specification.

Temperature Range Consideration: All substitute parts support extended operating temperature range (-40°C to 125°C) compared to the original part (-40°C to 85°C), providing additional design margin for high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74LCX08SJ with any of these substitute parts? A: Electrical substitution is possible for all listed parts. However, physical substitution depends on package compatibility. SN74LVC08ANS and SN74LVC08ANSR use the same 14-SOIC (0.209", 5.30mm Width) package and are direct PCB replacements. Other substitutes use a narrower 14-SOIC (0.154", 3.90mm Width) package and require PCB layout verification.

Q: What are the key differences between 74LCX and 74LVC series? A: Both series provide 4-channel 2-input AND gate functionality with compatible logic levels and output drive capability. The 74LVC series offers improved performance characteristics including faster propagation delay and lower quiescent current in most variants, along with extended operating temperature range and ROHS3 compliance.

Q: Which substitute part offers the best performance? A: SN74LVC08AD, SN74LVC08ADR, SN74LVC08ADT, and SN74LVC08ANSR all provide the fastest propagation delay (3.9ns) and lowest quiescent current (1 µA). Selection between these parts depends on packaging requirements and availability.

Q: Are all substitute parts RoHS compliant? A: Yes, all substitute parts are ROHS3 compliant. The original 74LCX08SJ does not specify RoHS status.

Q: What is the difference between packaging options (Tube, Tape & Reel, Cut Tape)? A: Packaging options affect order quantity and handling. Tube packaging is suitable for smaller quantities. Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel packaging are designed for automated assembly processes and higher-volume production.

Q: Can I use these substitutes in designs requiring the -40°C to 85°C temperature range? A: Yes. All substitute parts support the original -40°C to 85°C range and extend to 125°C, providing full backward compatibility for temperature-constrained applications.

Q: What is the significance of the different package widths (0.209" vs 0.154")? A: Package width affects PCB footprint dimensions. The 0.209" width (original 74LCX08SJ) is wider than the 0.154" width used by most substitutes. Direct PCB replacement is only possible with parts using the same width specification.

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