AS331KTR-G1 Equivalent & Substitute Parts

Part Overview

The AS331KTR-G1 is a general-purpose comparator IC manufactured by Diodes Incorporated, housed in a SOT-23-5 surface mount package. This single-element open-collector comparator operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), making it suitable for precision voltage comparison applications in industrial and consumer electronics. The part is currently active in production with ROHS3 compliance and maintains an inventory of 95,660 units. Equivalent and substitute parts are identified based on functional compatibility, electrical parameter alignment, and package availability to support design flexibility and supply chain continuity.

Substiute Parts

AS331KTR-G1

Diodes IncorporatedIn Stock: 95692AS331KTR-G1 Datasheet

Current PartRFQ

LMV331IDBVR

Texas InstrumentsIn Stock: 89366LMV331IDBVR Datasheet

MFR RecommendedRFQ

LMV331IDCKR

Texas InstrumentsIn Stock: 65451LMV331IDCKR Datasheet

MFR RecommendedRFQ

LT1011ACN8#PBF

Analog Devices Inc.In Stock: 2436LT1011ACN8#PBF Datasheet

MFR RecommendedRFQ

LT1011IS8#PBF

Analog Devices Inc.In Stock: 1863LT1011IS8#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AS331KTR-G1 are classified based on the following substitution criteria:

Primary Substitution Criteria:

• Functional type: General-purpose comparator with open-collector output
• Number of elements: Single comparator
• Supply voltage compatibility: Parts must operate within overlapping voltage ranges
• Input offset voltage: Maximum specification at rated conditions
• Input bias current: Maximum specification at rated conditions
• Output current capability: Typical output current at rated conditions
• Operating temperature range: Minimum -40°C to 85°C overlap
• RoHS3 compliance and active product status

Substitute Categories:

Category 1 - Direct Package Equivalents (SOT-23-5): LMV331IDBVR and LMV331IDCKR (Texas Instruments) maintain the same functional footprint and pinout compatibility. Both are general-purpose comparators with open-collector outputs and active product status. The LMV331IDBVR retains the SOT-23-5 package, while LMV331IDCKR uses SC-70-5 packaging, requiring PCB layout adjustment.

Category 2 - Alternative Package Options (8-DIP / 8-SO): LT1011ACN8#PBF (8-DIP through-hole) and LT1011IS8#PBF (8-SO surface mount) from Analog Devices Inc. provide functional equivalence with different package formats. These parts support broader supply voltage ranges and offer enhanced performance specifications, including lower input offset voltage and higher CMRR ratings.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (SOT-23-5 Package): The LMV331IDBVR from Texas Instruments provides the closest functional match with identical SOT-23-5 packaging. Both the AS331KTR-G1 and LMV331IDBVR maintain open-collector output architecture and single-element comparator configuration. However, the LMV331IDBVR operates within a narrower supply voltage range (2.7V ~ 5.5V) compared to the AS331KTR-G1 (2V ~ 36V). This substitution is suitable for applications operating exclusively within the 2.7V to 5.5V range. Both parts are ROHS3 compliant and active in production.

For Alternative Surface Mount Package (SC-70-5): The LMV331IDCKR offers functional equivalence with SC-70-5 packaging, requiring PCB layout modification. This part shares identical electrical specifications with the LMV331IDBVR and is suitable for space-constrained designs. ROHS3 compliance and active product status are maintained.

For Extended Supply Voltage Range: The LT1011IS8#PBF (8-SO surface mount) from Analog Devices Inc. supports the full extended supply voltage range (3V ~ 36V, ±1.5V ~ 18V) comparable to the AS331KTR-G1. This part offers superior input offset voltage performance (2mV @ ±15V) and lower input bias current (0.065µA @ ±15V). The 8-SO package requires PCB redesign but maintains surface mount compatibility. Operating temperature range extends to -40°C ~ 85°C, matching the AS331KTR-G1. ROHS3 compliance and active product status apply.

For Through-Hole Applications: The LT1011ACN8#PBF (8-DIP) provides functional equivalence for through-hole PCB designs. This part delivers the lowest input offset voltage (0.75mV @ ±15V) and highest CMRR specification (115dB). Operating temperature range is limited to 0°C ~ 70°C, which may restrict use in extended temperature applications. ROHS3 compliance and active product status are confirmed.

Compliance and Availability: All substitute parts maintain ROHS3 compliance and active product status. The AS331KTR-G1 offers the highest inventory availability (95,660 units), followed by LMV331IDBVR (89,300 units). LT1011 series parts show lower inventory levels, with LT1011IS8#PBF at 1,759 units and LT1011ACN8#PBF at 2,332 units.

Frequently Asked Questions (FAQ)

Q: Can the LMV331IDBVR directly replace the AS331KTR-G1 in all applications?

A: The LMV331IDBVR provides direct pin-compatible replacement with identical SOT-23-5 packaging and open-collector output configuration. However, the supply voltage range is restricted to 2.7V ~ 5.5V, compared to the AS331KTR-G1 range of 2V ~ 36V. Substitution is valid only for applications operating within the 2.7V to 5.5V window. Verify your circuit's supply voltage requirements before selection.

Q: What is the difference between LMV331IDBVR and LMV331IDCKR?

A: Both parts are functionally identical Texas Instruments comparators with matching electrical specifications. The primary difference is packaging: LMV331IDBVR uses SOT-23-5 (same as AS331KTR-G1), while LMV331IDCKR uses SC-70-5. The SC-70-5 package is smaller and suitable for space-constrained designs but requires PCB layout modification. Electrical performance is equivalent.

Q: Why do the LT1011 series parts have different operating temperature ranges?

A: The LT1011ACN8#PBF (8-DIP) operates from 0°C ~ 70°C, while LT1011IS8#PBF (8-SO) operates from -40°C ~ 85°C. These temperature specifications reflect the manufacturing grade and package thermal characteristics. For applications requiring -40°C operation, the LT1011IS8#PBF is the appropriate selection among the LT1011 options.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The AS331KTR-G1 and all listed substitute parts (LMV331IDBVR, LMV331IDCKR, LT1011ACN8#PBF, LT1011IS8#PBF) are ROHS3 compliant. All parts maintain active product status with established supply chains.

Q: What are the key electrical differences between the AS331KTR-G1 and LT1011IS8#PBF?

A: The LT1011IS8#PBF offers superior input offset voltage (2mV @ ±15V versus 5mV @ 5V) and lower input bias current (0.065µA @ ±15V versus 0.25µA @ 5V). The LT1011IS8#PBF supports extended supply voltage range (3V ~ 36V, ±1.5V ~ 18V) and higher output current (50mA versus 16mA). Both parts share identical -40°C ~ 85°C operating temperature range and open-collector output architecture. Package format differs: AS331KTR-G1 uses SOT-23-5 while LT1011IS8#PBF uses 8-SO.

Q: Can I use the LT1011ACN8#PBF in a design requiring -40°C operation?

A: No. The LT1011ACN8#PBF operates from 0°C ~ 70°C and is not suitable for applications requiring -40°C operation. For extended low-temperature operation, select the LT1011IS8#PBF (8-SO, -40°C ~ 85°C) or the AS331KTR-G1 (SOT-23-5, -40°C ~ 85°C).

Q: What inventory levels should I consider for long-term supply planning?

A: The AS331KTR-G1 maintains the highest inventory at 95,660 units, followed by LMV331IDBVR at 89,300 units. Both Texas Instruments LMV331 variants provide substantial stock. The LT1011 series shows lower availability: LT1011ACN8#PBF at 2,332 units and LT1011IS8#PBF at 1,759 units. For high-volume production, prioritize parts with higher inventory levels or confirm long-term availability with suppliers.