TL081CPSR Equivalent & Substitute Parts

Part Overview

The TL081CPSR is a J-FET input operational amplifier manufactured by Texas Instruments, housed in an 8-SO surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The TL081CPSR provides single-circuit amplification with J-FET input characteristics suitable for low-bias-current applications. Equivalent and substitute parts are necessary due to inventory constraints and product lifecycle status.

Substiute Parts

TL081CPSR

Texas InstrumentsIn Stock: 2981TL081CPSR Datasheet

Current PartRFQ

TL081CDR

Texas InstrumentsIn Stock: 1964TL081CDR Datasheet

MFR RecommendedRFQ

LF356M/NOPB

Texas InstrumentsIn Stock: 30931LF356M/NOPB Datasheet

MFR RecommendedRFQ

LF356MX/NOPB

Texas InstrumentsIn Stock: 90330LF356MX/NOPB Datasheet

MFR RecommendedRFQ

MC33171DT

STMicroelectronicsIn Stock: 5453MC33171DT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TL081CPSR is determined by the following criteria:

Primary Substitution Criteria:

• Amplifier Type: J-FET input configuration
• Number of Circuits: Single circuit (1)
• Package Type: 8-SOIC surface mount
• Electrical Parameters: Slew Rate, Gain Bandwidth Product, Input Bias Current, Input Offset Voltage, Supply Current, and Supply Voltage Range

Substitution Logic:

The TL081CDR qualifies as a direct manufacturer-recommended substitute. It maintains identical electrical specifications (13 V/µs slew rate, 3 MHz gain bandwidth product, 30 pA input bias current, 3 mV input offset voltage, 1.4 mA supply current, 7 V to 36 V supply range) and J-FET amplifier type. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and product status (Active versus Last Time Buy).

The LF356M/NOPB and LF356MX/NOPB are J-FET input operational amplifiers from the BI-FET series. These parts share the same 8-SOIC package and J-FET amplifier type. However, they exhibit different electrical characteristics: 12 V/µs slew rate (versus 13 V/µs), 5 MHz gain bandwidth product (versus 3 MHz), and 5 mA supply current (versus 1.4 mA). The supply voltage range differs (30 V fixed versus 7 V to 36 V variable). These differences indicate functional compatibility with design parameter verification.

The MC33171DT is a general-purpose operational amplifier from STMicroelectronics. While housed in an 8-SOIC package, it employs general-purpose amplifier architecture rather than J-FET input design. Input bias current is 20 nA (versus 30 pA), slew rate is 2 V/µs (versus 13 V/µs), and gain bandwidth product is 2.1 MHz (versus 3 MHz). Supply voltage range is 4 V to 44 V. This part represents a functional alternative for applications where J-FET input characteristics are not mandatory.

Parameter Comparison

Engineering Selection Recommendations

TL081CDR is the manufacturer-recommended primary substitute for TL081CPSR. Both devices maintain identical electrical specifications and J-FET input architecture. TL081CDR carries Active product status, ensuring long-term availability and supply continuity. Both parts are ROHS3 compliant and REACH unaffected. Selection of TL081CDR eliminates Last Time Buy constraints while preserving circuit performance characteristics.

LF356M/NOPB and LF356MX/NOPB are suitable substitutes when higher gain bandwidth product (5 MHz versus 3 MHz) is acceptable within circuit design margins. These BI-FET series devices maintain J-FET input bias current specifications (30 pA) and are ROHS3 compliant. The primary design consideration is the fixed 30 V supply voltage requirement versus the TL081CPSR's 7 V to 36 V range. Increased supply current (5 mA versus 1.4 mA) must be evaluated for power budget impact. LF356MX/NOPB offers significantly higher inventory availability (90,234 units).

MC33171DT is a functional alternative for applications where J-FET input characteristics are not critical design requirements. This general-purpose amplifier provides lower input bias current (20 nA), reduced slew rate (2 V/µs), and lower supply current (220 µA). The extended operating temperature range (-40°C to 105°C) and broader supply voltage range (4 V to 44 V) may benefit specific applications. MC33171DT is ROHS3 compliant with Active product status.

Frequently Asked Questions (FAQ)

Q: Can TL081CDR be used as a direct replacement for TL081CPSR?

A: Yes. TL081CDR is the manufacturer-recommended substitute with identical electrical specifications, J-FET amplifier type, and 8-SOIC package. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and product status (Active versus Last Time Buy). No circuit modifications are required.

Q: What are the key differences between TL081CPSR and LF356M/NOPB?

A: Both devices are J-FET input operational amplifiers in 8-SOIC packages with 30 pA input bias current and 3 mV input offset voltage. LF356M/NOPB provides higher gain bandwidth product (5 MHz versus 3 MHz) and slightly lower slew rate (12 V/µs versus 13 V/µs). The supply voltage is fixed at 30 V (versus 7 V to 36 V variable range), and supply current is higher (5 mA versus 1.4 mA). Design verification is required for supply voltage compatibility.

Q: Is MC33171DT compatible with TL081CPSR applications?

A: MC33171DT is functionally compatible for general-purpose amplifier applications but employs general-purpose rather than J-FET input architecture. Input bias current is significantly higher (20 nA versus 30 pA), and slew rate is substantially lower (2 V/µs versus 13 V/µs). Applications requiring low input bias current or high slew rate performance should retain J-FET input devices (TL081CDR, LF356M/NOPB, or LF356MX/NOPB).

Q: What is the package difference between TL081CPSR and TL081CDR?

A: Both use 8-SOIC surface mount packages. TL081CPSR package width is 0.209 inches (5.30 mm). TL081CDR package width is 0.154 inches (3.90 mm). The narrower package of TL081CDR may affect PCB layout compatibility. Physical verification of board-level fit is recommended before implementation.

Q: Which substitute offers the best inventory availability?

A: LF356MX/NOPB provides the highest inventory availability with 90,234 units in stock. LF356M/NOPB offers 30,916 units. TL081CDR provides 1,900 units. MC33171DT provides 5,400 units. Inventory levels should be verified at time of procurement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. TL081CPSR, TL081CDR, LF356M/NOPB, LF356MX/NOPB, and MC33171DT are all ROHS3 compliant. All parts are REACH unaffected and carry EAR99 ECCN classification.