TL331KDBVRG4 Equivalent & Substitute Parts

Part Overview

The TL331KDBVRG4 is a general-purpose comparator IC manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This device features open-collector, rail-to-rail output configuration with a single differential input element. The part is currently listed as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design support and procurement continuity.

Substiute Parts

TL331KDBVRG4

Texas InstrumentsIn Stock: 6210TL331KDBVRG4 Datasheet

Current PartRFQ

TL331KDBVR

Texas InstrumentsIn Stock: 125410TL331KDBVR Datasheet

Parametric EquivalentRFQ

TL331KDBVT

Texas InstrumentsIn Stock: 10131TL331KDBVT Datasheet

Parametric EquivalentRFQ

AP331AWG-7

Diodes IncorporatedIn Stock: 72489AP331AWG-7 Datasheet

MFR RecommendedRFQ

AS331KTR-G1

Diodes IncorporatedIn Stock: 95692AS331KTR-G1 Datasheet

MFR RecommendedRFQ

TS391RILT

STMicroelectronicsIn Stock: 17129TS391RILT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TL331KDBVRG4 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Supply voltage range: 2V ~ 36V, ±1V ~ 18V
• Input offset voltage: 5mV @ 30V or lower
• Input bias current: 0.25µA @ 5V or lower
• Output type: Open-Collector configuration
• Single differential input element

Physical Compatibility Requirements:

• Package type: SOT-23-5 (SC-74A, SOT-753)
• Surface mount mounting type
• Pin-compatible footprint

Regulatory Compliance:

• RoHS3 compliance
• REACH unaffected status

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications and packaging from the same manufacturer) and manufacturer-recommended alternatives (functionally equivalent from alternative manufacturers with minor specification variations within acceptable tolerances).

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalents (Preferred for Direct Replacement):

TL331KDBVR and TL331KDBVT are parametric equivalents manufactured by Texas Instruments with identical electrical specifications and packaging to the TL331KDBVRG4. Both parts are in active product status, ensuring long-term availability and supply chain stability. The primary difference between these two equivalents is packaging format: TL331KDBVR is supplied in Cut Tape (CT) & Digi-Reel format with 125,300 units in stock, while TL331KDBVT is supplied in Cut Tape (CT) & Digi-Reel format with 10,100 units in stock. Both maintain ROHS3 compliance and MSL 1 rating.

Manufacturer-Recommended Alternatives:

AP331AWG-7 (Diodes Incorporated) provides functional equivalence with identical supply voltage range and input offset specifications. This part operates within the 0°C ~ 70°C temperature range, which is narrower than the original -40°C ~ 105°C specification. Quiescent current is elevated at 2.5mA compared to 700µA in the original part. The supplier device package is SOT-25 rather than SOT-23-5, requiring PCB layout modification.

AS331KTR-G1 (Diodes Incorporated) maintains SOT-23-5 packaging and open-collector output configuration with identical supply voltage and input offset specifications. Operating temperature range is -40°C ~ 85°C, which is narrower than the original specification. Quiescent current is reduced to 1mA. Moisture sensitivity level is MSL 3 (168 Hours), requiring controlled storage conditions compared to MSL 1 for the original part.

TS391RILT (STMicroelectronics) provides functional equivalence with identical supply voltage, input offset, and input bias current specifications. Operating temperature range extends to -40°C ~ 125°C, exceeding the original specification. Quiescent current is 1.25mA. This part maintains MSL 1 rating and ROHS3 compliance.

Compliance and Regulatory Status:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component. Selection should prioritize parts with active product status to ensure sustained availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can TL331KDBVR or TL331KDBVT be used as direct replacements for TL331KDBVRG4?

A: Yes. TL331KDBVR and TL331KDBVT are parametric equivalents with identical electrical specifications, package type (SOT-23-5), and pin configuration. The only differences are packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and inventory levels. Both are in active product status, making them suitable for direct PCB substitution without design modification.

Q: What are the key differences between the Texas Instruments equivalents and the Diodes Incorporated alternatives?

A: Texas Instruments equivalents (TL331KDBVR, TL331KDBVT) maintain identical electrical specifications to the original part. Diodes Incorporated alternatives (AP331AWG-7, AS331KTR-G1) offer functional equivalence but with specification variations: AP331AWG-7 has narrower operating temperature range (0°C ~ 70°C) and higher quiescent current (2.5mA), plus requires SOT-25 packaging. AS331KTR-G1 maintains SOT-23-5 packaging but has narrower operating temperature (-40°C ~ 85°C) and MSL 3 moisture sensitivity.

Q: Is the AP331AWG-7 package change from SOT-23-5 to SOT-25 a concern?

A: Yes. SOT-25 and SOT-23-5 packages have different pin configurations and footprints. Substituting AP331AWG-7 requires PCB layout modification and cannot be used as a direct drop-in replacement. The SOT-23-5 alternatives (TL331KDBVR, TL331KDBVT, AS331KTR-G1, TS391RILT) maintain pin compatibility.

Q: What is the significance of MSL 3 rating on AS331KTR-G1?

A: MSL 3 (168 Hours) requires controlled storage conditions with maximum floor life of 168 hours after moisture exposure. This contrasts with MSL 1 (Unlimited) on the original part and most alternatives, which have no floor life restrictions. MSL 3 components require desiccant packaging and may incur additional handling costs.

Q: Which substitute part offers the widest operating temperature range?

A: TS391RILT from STMicroelectronics operates across -40°C ~ 125°C, exceeding the original TL331KDBVRG4 specification of -40°C ~ 105°C. This extended upper temperature limit may be beneficial for high-temperature applications, though it is not required for direct replacement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (TL331KDBVR, TL331KDBVT, AP331AWG-7, AS331KTR-G1, TS391RILT) maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.