TLE2021ACD Equivalent & Substitute Parts

Part Overview

The TLE2021ACD is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, though 1173 pieces remain available in new original stock. The TLE2021ACD belongs to the Excalibur™ series and is designed for applications requiring a single-circuit amplifier with moderate bandwidth and low input bias current.

Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and new production runs. Active alternatives with compatible electrical and mechanical specifications are available from both Texas Instruments and Analog Devices Inc.

Substiute Parts

TLE2021ACD

Texas InstrumentsIn Stock: 1246TLE2021ACD Datasheet

Current PartRFQ

TLE2021ACDR

Texas InstrumentsIn Stock: 3579TLE2021ACDR Datasheet

MFR RecommendedRFQ

LT1008S8#PBF

Analog Devices Inc.In Stock: 1268LT1008S8#PBF Datasheet

MFR RecommendedRFQ

LT1008S8#TRPBF

Analog Devices Inc.In Stock: 1946LT1008S8#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLE2021ACD is determined by strict electrical and mechanical compatibility within the following criteria:

Primary Substitution Criteria:

• Package type: 8-SOIC surface mount form factor (0.154" width, 3.90mm)
• Amplifier classification: General-purpose, single-circuit configuration
• Supply voltage range: Minimum 4V, maximum 40V (or compatible subset)
• Operating temperature range: 0°C to 70°C
• Output current capability: 20 mA per channel
• RoHS3 compliance and MSL Level 1 rating

Substitute Parts Identified:

1. TLE2021ACDR (Texas Instruments) — Direct manufacturer equivalent with identical electrical specifications. Differs only in packaging format (Tape & Reel vs. Tube) and product status (Active vs. Obsolete).

2. LT1008S8#PBF and LT1008S8#TRPBF (Analog Devices Inc.) — Cross-manufacturer alternatives with compatible package, supply voltage range, and operating temperature. Electrical parameters differ in slew rate (0.2V/µs vs. 0.65V/µs), input bias current (100 pA vs. 25 nA), and supply current (380µA vs. 240µA).

All substitute parts maintain the 8-SOIC package footprint, surface mount mounting type, and compliance certifications required for direct PCB-level replacement.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

The TLE2021ACDR is the primary substitute for the obsolete TLE2021ACD. Both parts share identical electrical specifications, including slew rate (0.65V/µs), gain bandwidth product (1.7 MHz), input bias current (25 nA), and supply current (240µA). The only difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. Tube). The TLE2021ACDR is suitable for new designs and production runs requiring long-term supply assurance. Current inventory of 3522 pieces supports volume production.

For Cross-Manufacturer Substitution:

The LT1008S8#PBF and LT1008S8#TRPBF (Analog Devices Inc.) are active alternatives that maintain mechanical compatibility and core supply voltage specifications. These parts differ in electrical performance: slew rate is reduced to 0.2V/µs, input bias current increases to 100 pA, and supply current rises to 380µA. Maximum supply voltage is limited to 36V instead of 40V. These differences are acceptable in applications where the lower slew rate and higher bias current do not impact circuit performance. Both variants are available in active production status with substantial inventory (1221 and 1843 pieces respectively).

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and EAR99 export classification, ensuring regulatory and environmental compatibility with the original TLE2021ACD.

Frequently Asked Questions (FAQ)

Q: Can the TLE2021ACDR be used as a direct drop-in replacement for the TLE2021ACD?

A: Yes. The TLE2021ACDR is electrically and mechanically identical to the TLE2021ACD. Both use the 8-SOIC package and share all key electrical parameters. The only difference is that TLE2021ACDR is in active production status, making it suitable for new designs and long-term supply planning.

Q: What are the main differences between the TLE2021ACD and the LT1008S8 variants?

A: The LT1008S8#PBF and LT1008S8#TRPBF differ in three electrical parameters: slew rate (0.2V/µs vs. 0.65V/µs), input bias current (100 pA vs. 25 nA), and supply current (380µA vs. 240µA). Maximum supply voltage is also reduced from 40V to 36V. These parts are suitable for applications where these differences do not affect circuit performance.

Q: Are packaging differences between Tube and Tape & Reel significant for substitution?

A: Packaging format (Tube vs. Tape & Reel) affects handling, storage, and automated assembly processes but does not impact electrical or mechanical compatibility. Selection depends on production volume and assembly equipment. Both formats are available for the TLE2021ACDR.

Q: Do all substitute parts meet the same compliance standards as the TLE2021ACD?

A: Yes. All substitute parts listed (TLE2021ACDR, LT1008S8#PBF, LT1008S8#TRPBF) are ROHS3 compliant, carry MSL Level 1 rating, and are REACH unaffected. They meet the same environmental and regulatory requirements as the original part.

Q: Which substitute should be selected for a new design?

A: For new designs requiring identical electrical performance, select the TLE2021ACDR. For applications where lower slew rate and higher input bias current are acceptable, the LT1008S8 variants offer cross-manufacturer alternatives with active production status and established supply chains.

Q: Is the 4V minimum supply voltage compatible across all parts?

A: Yes. All parts (TLE2021ACD, TLE2021ACDR, LT1008S8#PBF, LT1008S8#TRPBF) support a minimum supply voltage of 4V. However, the LT1008 variants are limited to a maximum of 36V, compared to 40V for the TLE2021 series.