TL343IDBVT Equivalent & Substitute Parts

Part Overview

The TL343IDBVT is a general-purpose operational amplifier manufactured by Texas Instruments, packaged in SOT-23-5 surface mount configuration. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The TL343IDBVT serves applications requiring single-channel amplification with low input bias current and moderate bandwidth characteristics. Due to its Last Time Buy status, identifying functionally equivalent substitute components is essential for design continuity and long-term supply chain planning.

Substiute Parts

TL343IDBVT

Texas InstrumentsIn Stock: 6148TL343IDBVT Datasheet

Current PartRFQ

TL343IDBVR

Texas InstrumentsIn Stock: 21146TL343IDBVR Datasheet

MFR RecommendedRFQ

TS321AILT

STMicroelectronicsIn Stock: 69552TS321AILT Datasheet

MFR RecommendedRFQ

TS321ILT

STMicroelectronicsIn Stock: 104420TS321ILT Datasheet

MFR RecommendedRFQ

TS321IYLT

STMicroelectronicsIn Stock: 18998TS321IYLT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL343IDBVT is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Package / Case: SC-74A, SOT-753 (SOT-23-5 supplier device package)
• Mounting Type: Surface Mount
• Number of Circuits: 1
• Operating Temperature Range: -40°C to 125°C
• Voltage Supply Span: 3 V to 30 V
• RoHS3 Compliance

Performance Parameters Defining Substitution Classes:

• Slew Rate: 1 V/µs (TL343IDBVT specification)
• Gain Bandwidth Product: 1 MHz (TL343IDBVT specification)
• Current - Input Bias: 200 nA (TL343IDBVT specification)
• Voltage - Input Offset: 2 mV (TL343IDBVT specification)
• Current - Supply: 700 µA (TL343IDBVT specification)
• Current - Output / Channel: 30 mA (TL343IDBVT specification)

Substitute parts are grouped into two categories:

Category 1 - Direct Electrical Equivalents (Identical Performance Parameters): Parts matching all performance specifications of the TL343IDBVT enable direct replacement without circuit redesign.

Category 2 - Functional Equivalents (Relaxed Performance Parameters): Parts with different performance characteristics but identical package, supply voltage range, and operating temperature. These substitutes require circuit validation to confirm application compatibility.

Parameter Comparison

Engineering Selection Recommendations

TL343IDBVR (Texas Instruments)

The TL343IDBVR is the primary substitute for the TL343IDBVT. This part maintains identical electrical performance specifications across all measured parameters: 1 V/µs slew rate, 1 MHz gain bandwidth product, 200 nA input bias current, and 2 mV input offset voltage. The only distinction is packaging format: TL343IDBVR is supplied in Cut Tape (CT) & Digi-Reel® format versus the original Tape & Reel (TR) packaging. Both parts are manufactured by Texas Instruments, share the same base product number (TL343), and maintain ROHS3 compliance. The TL343IDBVR carries Active product status, ensuring continued availability and supply chain stability. This part is recommended as the direct replacement when packaging format change is acceptable.

TS321AILT, TS321ILT, TS321IYLT (STMicroelectronics)

The TS321 series from STMicroelectronics represents functional equivalents with relaxed performance specifications. These parts maintain identical package geometry (SC-74A, SOT-753), mounting type (Surface Mount), supply voltage range (3 V to 30 V), and operating temperature range (-40°C to 125°C). However, performance parameters differ: TS321 variants exhibit 0.4 V/µs slew rate (versus 1 V/µs), 800 kHz gain bandwidth product (versus 1 MHz), 20 nA input bias current (versus 200 nA), and 0.5 mV input offset voltage (versus 2 mV). All TS321 variants are Active products with ROHS3 compliance.

TS321IYLT Automotive Qualification: The TS321IYLT variant includes Automotive grade designation and AEC-Q100 qualification, suitable for automotive applications requiring functional equivalence with automotive-grade component certification.

Selection between TL343IDBVR and TS321 series depends on application requirements: TL343IDBVR for direct electrical equivalence; TS321 series for applications tolerating lower slew rate and bandwidth with improved input bias current and offset voltage characteristics.

Frequently Asked Questions (FAQ)

Q1: Can TL343IDBVR directly replace TL343IDBVT without circuit modification?

A: Yes. The TL343IDBVR maintains identical electrical performance specifications: 1 V/µs slew rate, 1 MHz gain bandwidth product, 200 nA input bias current, 2 mV input offset voltage, 700 µA supply current, and 30 mA output current. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). Pinout and functional behavior are identical. No circuit redesign is required.

Q2: What are the key differences between TL343IDBVT and TS321 series substitutes?

A: The TS321 series exhibits lower slew rate (0.4 V/µs versus 1 V/µs) and lower gain bandwidth product (800 kHz versus 1 MHz). Conversely, TS321 variants provide superior input bias current (20 nA versus 200 nA) and input offset voltage (0.5 mV versus 2 mV). Output current capability is higher (40 mA versus 30 mA). These differences require application-specific evaluation to confirm compatibility.

Q3: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All listed substitutes use identical package designation (SC-74A, SOT-753) and mounting type (Surface Mount). PCB footprint compatibility is guaranteed. No layout modifications are necessary.

Q4: What is the significance of Last Time Buy status for TL343IDBVT?

A: Last Time Buy indicates Texas Instruments has discontinued production of the TL343IDBVT. Current inventory (6100 pcs) represents the final available stock. Once depleted, this part number will no longer be available. Transition to TL343IDBVR (Active status) or TS321 series is necessary for long-term supply continuity.

Q5: Can TS321IYLT be used in non-automotive applications?

A: Yes. TS321IYLT meets all functional and electrical requirements for general-purpose applications. Automotive grade and AEC-Q100 qualification represent additional certifications that do not restrict use in non-automotive designs. The part is functionally equivalent to TS321AILT and TS321ILT for non-automotive applications.

Q6: What packaging options are available for substitute parts?

A: TL343IDBVR is supplied in Cut Tape (CT) & Digi-Reel® format. TS321AILT, TS321ILT, and TS321IYLT are also supplied in Cut Tape (CT) & Digi-Reel® format. All parts are available in SOT-23-5 supplier device package. Tape & Reel (TR) format availability should be confirmed with the supplier if required for automated assembly processes.

Q7: Are all substitute parts RoHS3 compliant?

A: Yes. TL343IDBVR, TS321AILT, TS321ILT, and TS321IYLT are all ROHS3 compliant. Moisture Sensitivity Level is 1 (Unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.

Q8: Which substitute part offers the best input bias current performance?

A: TS321 series variants (TS321AILT, TS321ILT, TS321IYLT) provide 20 nA input bias current, compared to 200 nA for TL343IDBVT and TL343IDBVR. Applications requiring minimal input bias current should specify TS321 series. However, this performance improvement is accompanied by reduced slew rate and gain bandwidth product.