TL343IDBVRE4 Equivalent & Substitute Parts

Part Overview

The TL343IDBVRE4 is a general purpose operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-circuit op-amp is designed for linear amplification applications requiring low-power operation across a wide supply voltage range. The device is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain functional compatibility through matching electrical specifications and identical packaging configurations.

Substiute Parts

TL343IDBVRE4

Texas InstrumentsIn Stock: 3281TL343IDBVRE4 Datasheet

Current PartRFQ

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 TL343IDBVRE4 is determined by equivalence across the following critical parameters:

Functional Compatibility Requirements:

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

Electrical Performance Boundaries: Substitute parts must operate within the specified supply voltage range and temperature range. The TL343IDBVRE4 establishes baseline electrical characteristics including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current capacity. Substitute devices with equivalent or superior electrical performance in these parameters maintain functional compatibility.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and MSL Level 1 rating to ensure manufacturing and environmental compatibility.

The three identified substitute parts—TS321AILT, TS321ILT, and TS321IYLT—are manufactured by STMicroelectronics and share identical packaging, mounting type, and supply voltage specifications with the TL343IDBVRE4.

Parameter Comparison

Engineering Selection Recommendations

TS321AILT and TS321ILT Selection: Both TS321AILT and TS321ILT are active STMicroelectronics products with identical electrical specifications. These parts provide direct functional substitution for the obsolete TL343IDBVRE4. The TS321 series demonstrates superior electrical performance in input bias current (20 nA versus 200 nA), input offset voltage (0.5 mV versus 2 mV), and output current capacity (40 mA versus 30 mA). Supply current consumption is reduced (600 µA versus 700 µA). These improvements ensure compatibility with existing circuit designs while offering enhanced performance margins. Both parts maintain identical packaging, supply voltage range, and operating temperature specifications.

TS321IYLT Selection: The TS321IYLT is an automotive-grade variant of the TS321 series, qualified to AEC-Q100 standards. This part is appropriate for applications requiring automotive-grade components or enhanced reliability certifications. Electrical specifications are identical to TS321AILT and TS321ILT. Selection of TS321IYLT is driven by application requirements for automotive qualification rather than functional differences.

Inventory and Availability: TS321ILT maintains the highest inventory level (104,400 pieces), followed by TS321AILT (69,500 pieces) and TS321IYLT (18,972 pieces). Selection based on availability should consider production volume requirements and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can TS321AILT, TS321ILT, or TS321IYLT be used as direct replacements for TL343IDBVRE4 in existing designs?

A: Yes. All three substitute parts share identical packaging (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). Pin-to-pin compatibility is maintained. The TS321 series demonstrates equal or superior electrical performance across all measured parameters.

Q: What are the electrical performance differences between TL343IDBVRE4 and the TS321 series?

A: The TS321 series exhibits lower input bias current (20 nA versus 200 nA), lower input offset voltage (0.5 mV versus 2 mV), and higher output current capacity (40 mA versus 30 mA). Slew rate and gain bandwidth product are lower in the TS321 series (0.4 V/µs and 800 kHz versus 1 V/µs and 1 MHz). These differences are within acceptable substitution parameters for general purpose amplifier applications.

Q: Are there differences between TS321AILT, TS321ILT, and TS321IYLT?

A: TS321AILT and TS321ILT are functionally identical with identical electrical specifications. TS321IYLT is an automotive-grade variant with AEC-Q100 qualification. Selection between TS321AILT and TS321ILT is based on packaging format (Cut Tape or Digi-Reel) and inventory availability. Selection of TS321IYLT is appropriate only when automotive-grade qualification is required.

Q: What is the significance of the SOT-23-5 package designation?

A: SOT-23-5 is the industry-standard surface mount package for single operational amplifiers. The TL343IDBVRE4 and all three substitute parts use this package, ensuring mechanical and electrical compatibility on printed circuit boards. The package accommodates five leads: non-inverting input, inverting input, positive supply, negative supply, and output.

Q: Does substitution require circuit board redesign?

A: No. The identical SOT-23-5 package and pin configuration eliminate the need for circuit board redesign. Direct component substitution on existing boards is supported.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TL343IDBVRE4 and all three substitute parts (TS321AILT, TS321ILT, TS321IYLT) are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with modern manufacturing processes and environmental regulations.

Q: Which substitute part should be selected for new designs?

A: For new designs, TS321ILT or TS321AILT are appropriate selections based on availability and packaging requirements. TS321IYLT should be selected only when automotive-grade qualification is specified. All three parts are active products with established supply chains.