TL331QDBVRQ1 Equivalent & Substitute Parts

Part Overview

The TL331QDBVRQ1 is a general-purpose comparator IC manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-element comparator features open-collector, rail-to-rail output capability and operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply). The device is actively produced, AEC-Q100 qualified for automotive applications, and ROHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity.

Substiute Parts

TL331QDBVRQ1

Texas InstrumentsIn Stock: 26466TL331QDBVRQ1 Datasheet

Current PartRFQ

TS391RILT

STMicroelectronicsIn Stock: 17129TS391RILT Datasheet

DirectRFQ

LMV331W5-7

Diodes IncorporatedIn Stock: 20394LMV331W5-7 Datasheet

MFR RecommendedRFQ

NCV391SN2T1G

onsemiIn Stock: 122489NCV391SN2T1G Datasheet

MFR RecommendedRFQ

TA75S393F,LF

Toshiba Semiconductor and StorageIn Stock: 150414TA75S393F,LF Datasheet

MFR RecommendedRFQ

TS391AILT

STMicroelectronicsIn Stock: 2154TS391AILT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TL331QDBVRQ1 are qualified based on the following critical parameters:

Electrical Compatibility:

• Supply voltage range: 2V ~ 36V (single) or ±1V ~ ±18V (dual)
• Input offset voltage: 5mV maximum at 5V
• Input bias current: 0.25µA maximum at 5V
• Operating temperature range: -40°C ~ 125°C minimum
• Output type: Open-collector or equivalent switching capability

Mechanical Compatibility:

• Package type: SOT-23-5 or equivalent 5-pin surface mount packages (SOT-753, TSOT-23-5, SMV)
• Mounting: Surface mount only
• Pin configuration: Compatible with SOT-23-5 footprint

Compliance & Status:

• Product status: Active
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL 1 or MSL 3 acceptable for standard applications

Substitutes are grouped into two categories: direct equivalents (TS391RILT, TS391AILT) and manufacturer-recommended alternatives (LMV331W5-7, NCV391SN2T1G, TA75S393F,LF) that meet the core electrical and mechanical requirements while offering variations in output type, quiescent current, or propagation delay characteristics.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Preferred for Pin-Compatible Replacement):

TS391RILT and TS391AILT from STMicroelectronics are functionally equivalent to the TL331QDBVRQ1. Both devices maintain identical supply voltage ranges, input offset specifications, and input bias current ratings. These parts are actively produced, ROHS3 compliant, and feature MSL 1 moisture sensitivity. The TS391 series is suitable for direct substitution in existing designs without layout modifications.

Manufacturer-Recommended Alternatives (Extended Capability):

LMV331W5-7 (Diodes Incorporated) offers higher output current capability (84mA typical at 5V) and lower quiescent current (200µA maximum), making it suitable for applications requiring increased drive capability or lower power consumption. However, the supply voltage range is restricted to 2.7V ~ 5.5V, limiting its use to single 5V supply designs. Moisture sensitivity is MSL 3, requiring controlled storage conditions.

NCV391SN2T1G (onsemi) maintains the full supply voltage range and provides specified propagation delay (850ns typical). This part is available in high inventory quantities and is suitable for applications where timing specifications are critical.

TA75S393F,LF (Toshiba) provides the lowest input bias current (0.05µA maximum at 5V) and maintains full supply voltage compatibility. The operating temperature range is limited to -40°C ~ 85°C, restricting use in applications requiring extended high-temperature operation beyond 85°C.

Selection Criteria:

• For direct replacement with no design changes: TS391RILT or TS391AILT
• For reduced power consumption: LMV331W5-7 (5V supply designs only)
• For timing-critical applications: NCV391SN2T1G
• For lowest input bias current: TA75S393F,LF (temperature range ≤ 85°C)
• For extended temperature operation: TL331QDBVRQ1, TS391 series, or NCV391SN2T1G

Frequently Asked Questions (FAQ)

Q: Can TS391RILT be used as a direct replacement for TL331QDBVRQ1?

A: Yes. Both devices share identical supply voltage ranges (2V ~ 36V single, ±1V ~ 18V dual), input offset voltage (5mV maximum), input bias current (0.25µA maximum), and operating temperature range (-40°C ~ 125°C). Package compatibility is confirmed (SOT-23-5). No design modifications are required.

Q: What is the key difference between LMV331W5-7 and the TL331QDBVRQ1?

A: LMV331W5-7 has a restricted supply voltage range (2.7V ~ 5.5V) compared to the TL331QDBVRQ1 (2V ~ 36V). It is suitable only for single 5V supply applications. LMV331W5-7 offers higher output current (84mA typical) and lower quiescent current (200µA maximum), beneficial for power-sensitive designs operating at 5V.

Q: Why does TA75S393F,LF have a lower operating temperature maximum (85°C vs. 125°C)?

A: TA75S393F,LF is specified with a maximum operating temperature of 85°C, while the TL331QDBVRQ1 is rated to 125°C. Applications requiring operation above 85°C must use the TL331QDBVRQ1, TS391 series, or NCV391SN2T1G.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (TS391RILT, TS391AILT, LMV331W5-7, NCV391SN2T1G, TA75S393F,LF) are ROHS3 compliant, matching the compliance status of the TL331QDBVRQ1.

Q: What is the significance of Moisture Sensitivity Level (MSL) differences?

A: MSL 1 (unlimited) parts require no special moisture control during storage and handling. MSL 3 parts (LMV331W5-7) require controlled storage conditions (168 hours maximum exposure at specified humidity levels) before soldering. For standard manufacturing environments, MSL 1 parts are preferred.

Q: Can LMV331W5-7 be used in a ±18V dual supply application?

A: No. LMV331W5-7 is specified for 2.7V ~ 5.5V supply voltage only and cannot operate with dual ±18V supplies. Use TL331QDBVRQ1, TS391 series, or NCV391SN2T1G for dual supply applications.

Q: Which substitute part has the fastest propagation delay?

A: LMV331W5-7 has a specified maximum propagation delay of 450ns at 5V. NCV391SN2T1G specifies 850ns typical propagation delay. Other parts do not provide propagation delay specifications in the available data.

Q: Are the TS391RILT and TS391AILT interchangeable?

A: Yes. Both TS391RILT and TS391AILT are from the same STMicroelectronics TS391 series and share identical electrical specifications, supply voltage ranges, and package configurations. They are interchangeable for the TL331QDBVRQ1 application.