TL031CD Equivalent & Substitute Parts

Part Overview

The TL031CD is a J-FET input operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as a Linear Amplifier and is currently in Last Time Buy status, indicating discontinued production with limited remaining inventory. The TL031CD contains a single amplifier circuit designed for applications requiring low input bias current and low input offset voltage characteristics typical of J-FET input designs.

Due to the Last Time Buy status of the TL031CD, identifying equivalent substitute parts with identical electrical and mechanical specifications is essential for design continuity and long-term component availability.

Substiute Parts

TL031CD

Texas InstrumentsIn Stock: 1484TL031CD Datasheet

Current PartRFQ

TL031CDR

Texas InstrumentsIn Stock: 2750TL031CDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL031CD is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must maintain identical specifications in the following critical areas:

Electrical Parameters: Amplifier type (J-FET), number of circuits (1), slew rate (5.1 V/µs), gain bandwidth product (1.1 MHz), input bias current (2 pA), input offset voltage (500 µV), supply current (217 µA), output current per channel (40 mA), and supply voltage range (10 V to 30 V).

Mechanical Parameters: Package type (8-SOIC with 0.154" / 3.90mm width), surface mount mounting type, and pin configuration must be identical.

Compliance Parameters: RoHS3 compliance, MSL Level 1, and REACH unaffected status must be maintained.

The TL031CDR qualifies as a direct substitute based on complete parameter equivalence across all electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The TL031CDR is a direct electrical and mechanical equivalent of the TL031CD. All functional parameters, pin configurations, and compliance certifications are identical. The primary differences are packaging format and product status.

Product Status Consideration: The TL031CD is in Last Time Buy status with 1446 units in stock, while the TL031CDR is Active with 2670 units available. For new designs or long-term production requirements, the TL031CDR is the appropriate selection due to its active status and higher inventory availability.

Packaging Format: The TL031CD is supplied in Tube packaging, while the TL031CDR is supplied in Tape & Reel (TR) format. Both formats are suitable for surface mount assembly; the selection depends on manufacturing process requirements and volume considerations.

Compliance: Both parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status, ensuring regulatory compatibility across applications.

Frequently Asked Questions (FAQ)

Q: Can the TL031CDR replace the TL031CD in existing designs?

A: Yes. The TL031CDR is electrically and mechanically identical to the TL031CD. All electrical parameters, pin assignments, package dimensions, and operating characteristics are equivalent. Direct substitution is possible without circuit modification.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging supplies components in plastic tubes suitable for manual handling and small-volume assembly. Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, optimized for automated pick-and-place assembly equipment. Both formats contain identical components; the selection depends on assembly process capability.

Q: Why is the TL031CD in Last Time Buy status?

A: Last Time Buy status indicates that the manufacturer has discontinued production of this part number. Existing inventory is available for purchase, but no future production is planned. The TL031CDR, as an active equivalent, is recommended for new designs to ensure long-term component availability.

Q: Are there any electrical performance differences between TL031CD and TL031CDR?

A: No. Both parts share identical electrical specifications including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current ratings. Operating temperature range and supply voltage specifications are also identical.

Q: What is the significance of MSL Level 1 rating?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life with no moisture sensitivity precautions required. Both the TL031CD and TL031CDR can be stored and handled under standard conditions without special moisture control measures.

Q: Can the TL031CDR be used in applications originally designed for the TL031CD?

A: Yes. Complete parameter equivalence ensures functional compatibility. No circuit redesign, PCB layout modification, or application firmware changes are required. The TL031CDR is a direct drop-in replacement.