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74LCX00SJ NAND Gate IC Equivalent & Substitute Parts
Part Overview
The 74LCX00SJ is a 4-channel 2-input NAND gate logic IC manufactured by onsemi in a 14-SOP surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74LCX00 series provides low-voltage CMOS logic functionality suitable for applications requiring 2V to 3.6V supply operation with minimal quiescent current consumption.
Substiute Parts
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 |
| 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) |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the 74LCX00SJ is determined by the following critical parameters:
Functional Equivalence: All substitute parts maintain identical logic configuration (4-channel 2-input NAND gate) and circuit count.
Electrical Compatibility: Supply voltage range, quiescent current, output drive capability, input logic thresholds, and propagation delay determine functional interchangeability. Parts with overlapping or extended voltage ranges and compatible timing characteristics are suitable substitutes.
Package Compatibility: The 14-SOIC package footprint is the primary mechanical constraint. Substitutes are available in two package variants: 14-SOIC (0.154", 3.90mm Width) and 14-SOIC (0.209", 5.30mm Width). Both are mechanically compatible with the original 14-SOP footprint for surface mount assembly.
Product Status & Compliance: Active product status ensures ongoing availability. RoHS3 compliance and REACH unaffected status are maintained across all substitute options.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Voltage - Supply | Current - Quiescent (Max) | Propagation Delay @ 3.3V, 50pF | Operating Temperature | Package / Case | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| 74LCX00SJ | onsemi | Obsolete | 2V ~ 3.6V | 10 µA | 5.2ns | -40°C ~ 85°C | 14-SOIC (0.209", 5.30mm) | Not Specified |
| MC74LCX00DR2G | onsemi | Active | 2V ~ 3.6V | 10 µA | 5.5ns | -40°C ~ 85°C | 14-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| 74LVC00AD,118 | Nexperia USA Inc. | Active | 1.2V ~ 3.6V | 40 µA | 4.3ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| SN74LVC00AD | Texas Instruments | Active | 1.65V ~ 3.6V | 1 µA | 4.1ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| SN74LVC00ADR | Texas Instruments | Active | 1.65V ~ 3.6V | 1 µA | 4.1ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| SN74LVC00ADRG4 | Texas Instruments | Discontinued at DiGi Electronics | 1.65V ~ 3.6V | 1 µA | 4.1ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| SN74LVC00ADT | Texas Instruments | Active | 1.65V ~ 3.6V | 1 µA | 4.1ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
| SN74LVC00ANS | Texas Instruments | Active | 1.65V ~ 3.6V | 1 µA | 4.1ns | -40°C ~ 125°C | 14-SOIC (0.209", 5.30mm) | ROHS3 Compliant |
| SN74LVC00ANSR | Texas Instruments | Active | 1.65V ~ 3.6V | 1 µA | 4.1ns | -40°C ~ 125°C | 14-SOIC (0.209", 5.30mm) | ROHS3 Compliant |
| SN74LVC00AQDREP | Texas Instruments | Active | 2V ~ 3.6V | 10 µA | 4.3ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitute - MC74LCX00DR2G (onsemi): Maintains identical electrical specifications to the 74LCX00SJ with matching supply voltage range (2V ~ 3.6V) and quiescent current (10 µA). Active product status and RoHS3 compliance ensure long-term availability. Propagation delay of 5.5ns is within acceptable tolerance of the original 5.2ns specification.
Extended Temperature Range Alternatives - SN74LVC00 Series (Texas Instruments): The SN74LVC00AD, SN74LVC00ADR, SN74LVC00ADT, SN74LVC00ANS, and SN74LVC00ANSR variants provide superior quiescent current performance (1 µA) and extended operating temperature range (-40°C ~ 125°C). These parts are suitable for applications requiring lower power consumption and wider temperature operation. All variants maintain active product status and RoHS3 compliance.
Nexperia Alternative - 74LVC00AD,118: Offers extended supply voltage range (1.2V ~ 3.6V) and improved propagation delay (4.3ns). Active product status and RoHS3 compliance are confirmed. Quiescent current of 40 µA is higher than the original specification but remains acceptable for most applications.
Package Consideration: SN74LVC00ANS and SN74LVC00ANSR maintain the original 14-SOIC (0.209", 5.30mm Width) package footprint. All other substitutes use the 14-SOIC (0.154", 3.90mm Width) variant, which is mechanically compatible with standard 14-SOIC PCB layouts.
Avoid: SN74LVC00ADRG4 is discontinued at DiGi Electronics and should not be selected for new designs requiring long-term component availability.
Frequently Asked Questions (FAQ)
Q: Can I use SN74LVC00AD as a direct replacement for 74LCX00SJ?
A: Yes. Both parts are 4-channel 2-input NAND gates in 14-SOIC packages with identical logic functionality. The SN74LVC00AD has superior specifications including lower quiescent current (1 µA vs. 10 µA), faster propagation delay (4.1ns vs. 5.2ns), and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). The supply voltage range of SN74LVC00AD (1.65V ~ 3.6V) overlaps with the original part's range (2V ~ 3.6V).
Q: What is the difference between the 14-SOIC (0.154", 3.90mm) and 14-SOIC (0.209", 5.30mm) packages?
A: Both are 14-pin surface mount packages with identical pin pitch and electrical compatibility. The primary difference is package width: 3.90mm versus 5.30mm. The narrower 3.90mm variant is more compact. Both footprints are mechanically compatible with standard 14-SOIC PCB designs. Verify your PCB layout accommodates the selected package width.
Q: Is MC74LCX00DR2G the best substitute for the obsolete 74LCX00SJ?
A: MC74LCX00DR2G is the closest electrical match, maintaining identical supply voltage range and quiescent current specifications. It is manufactured by the same company (onsemi) and has active product status. However, SN74LVC00 variants from Texas Instruments offer superior performance characteristics and extended temperature range if your application permits the lower minimum supply voltage (1.65V vs. 2V).
Q: Do all substitute parts have RoHS3 compliance?
A: All active substitute parts listed are RoHS3 compliant. The original 74LCX00SJ does not specify RoHS status. RoHS3 compliance ensures compliance with current environmental regulations for new designs.
Q: Which substitute has the lowest power consumption?
A: SN74LVC00 variants (SN74LVC00AD, SN74LVC00ADR, SN74LVC00ADT, SN74LVC00ANS, SN74LVC00ANSR) have the lowest quiescent current at 1 µA, compared to 10 µA for the original part and MC74LCX00DR2G. This represents a 10-fold reduction in standby power consumption.
Q: Can I use 74LVC00AD,118 from Nexperia in a 2V supply application?
A: No. The 74LVC00AD,118 has a minimum supply voltage of 1.2V, but the original 74LCX00SJ operates at 2V minimum. While the Nexperia part functions at 1.2V, it is not rated for operation below 1.2V. If your application requires 2V minimum supply operation, use MC74LCX00DR2G or SN74LVC00AQDREP instead.
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