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SN74LVC2G66DCU3 Equivalent & Substitute Parts
Part Overview
The SN74LVC2G66DCU3 is a 2-circuit IC switch with SPST-NO (Single Pole Single Throw - Normally Open) configuration manufactured by Texas Instruments. This component operates as a 1:1 multiplexer/demultiplexer with 10Ohm on-state resistance and supports supply voltages from 1.65V to 5.5V. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying qualified substitute components ensures design continuity and supply chain reliability for applications requiring equivalent switching functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | SN74LVC2G66DCU3 |
| Product Status | Last Time Buy |
| RoHS Status | ROHS3 Compliant |
| REACH Status | REACH Unaffected |
| Switch Circuit Type | SPST - NO |
| Number of Circuits | 2 |
| On-State Resistance (Max) | 10Ohm |
| Supply Voltage Range | 1.65V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
Substitute Part Grouping Explanation
Substitution for the SN74LVC2G66DCU3 is determined by the following critical parameters:
- Switch Configuration: SPST-NO topology with 2 circuits
- On-State Resistance: Maximum 10Ohm specification
- Supply Voltage Compatibility: 1.65V to 5.5V single supply operation
- Electrical Performance: Switching time, bandwidth, and leakage current characteristics
- Compliance Standards: RoHS3 and REACH compliance status
- Manufacturer Support: Active product status with ongoing availability
The SN74LVC2G66DCUR qualifies as a direct substitute based on identical electrical specifications, matching switch topology, and active product status from the same manufacturer.
Parameter Comparison
| Parameter | SN74LVC2G66DCU3 | SN74LVC2G66DCUR |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Product Status | Last Time Buy | Active |
| Switch Circuit | SPST - NO | SPST - NO |
| Number of Circuits | 2 | 2 |
| On-State Resistance (Max) | 10Ohm | 10Ohm |
| Channel-to-Channel Matching (ΔRon) | Not specified | 2Ohm (Max) |
| Supply Voltage Range | 1.65V ~ 5.5V | 1.65V ~ 5.5V |
| Switch Time (Ton, Toff) Max | Not specified | 3.9ns, 6.3ns |
| -3dB Bandwidth | Not specified | 300MHz |
| Channel Capacitance (CS(off), CD(off)) | Not specified | 6pF |
| Current - Leakage (IS(off)) Max | Not specified | 100nA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected |
| Packaging | Not specified | Cut Tape (CT) & Digi-Reel® |
| Package / Case | Not specified | 8-VFSOP (0.091", 2.30mm Width) |
Engineering Selection Recommendations
The SN74LVC2G66DCUR is the qualified substitute for the SN74LVC2G66DCU3 based on the following criteria:
- Electrical Equivalence: Identical switch topology (SPST-NO), circuit count (2), and on-state resistance (10Ohm maximum)
- Supply Voltage Compatibility: Both parts operate across the same 1.65V to 5.5V range
- Temperature Range: Matching -40°C to 85°C operating specification
- Compliance Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status
- Product Availability: The substitute part maintains Active product status, ensuring continued supply and support from Texas Instruments
Selection of the SN74LVC2G66DCUR eliminates obsolescence risk associated with the Last Time Buy status of the original part while maintaining full electrical and functional compatibility.
Frequently Asked Questions (FAQ)
Q: What is the primary reason for substituting the SN74LVC2G66DCU3?
A: The SN74LVC2G66DCU3 is in Last Time Buy status, indicating end-of-life production. The SN74LVC2G66DCUR provides equivalent functionality with Active product status and ongoing manufacturer support.
Q: Are the electrical specifications identical between these parts?
A: Both parts share identical core specifications: SPST-NO switch configuration, 2 circuits, 10Ohm maximum on-state resistance, and 1.65V to 5.5V supply voltage range. The substitute part provides additional documented parameters including switching time, bandwidth, and leakage current specifications.
Q: What are the packaging differences?
A: The SN74LVC2G66DCUR is available in Cut Tape (CT) and Digi-Reel packaging options with 8-VFSOP case specification. Verify packaging compatibility with your assembly process requirements.
Q: Do both parts meet the same compliance standards?
A: Yes. Both the SN74LVC2G66DCU3 and SN74LVC2G66DCUR are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory requirements.
Q: Can the SN74LVC2G66DCUR be used as a direct replacement in existing designs?
A: Yes, the SN74LVC2G66DCUR functions as a direct electrical substitute. Confirm that the available packaging format (Cut Tape/Digi-Reel, 8-VFSOP) is compatible with your manufacturing and assembly specifications.
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