TL081ACN Equivalent & Substitute Parts

Part Overview

The TL081ACN is a J-FET input operational amplifier manufactured by STMicroelectronics, housed in an 8-DIP through-hole package. This device is classified as obsolete, though 874 pieces remain in stock as new original inventory. The TL081ACN serves applications requiring low input bias current and low input offset voltage characteristics typical of J-FET amplifier designs. Due to its obsolete status, identifying equivalent and substitute parts is necessary for ongoing design support, production continuity, and long-term component availability assurance.

Substiute Parts

TL081ACN

STMicroelectronicsIn Stock: 914TL081ACN Datasheet

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LF356N/NOPB

Texas InstrumentsIn Stock: 17519LF356N/NOPB Datasheet

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TL071CP

Texas InstrumentsIn Stock: 22310TL071CP Datasheet

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TL071IP

Texas InstrumentsIn Stock: 1197TL071IP Datasheet

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TL081ACP

Texas InstrumentsIn Stock: 4337TL081ACP Datasheet

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TL081BCP

Texas InstrumentsIn Stock: 2204TL081BCP Datasheet

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TL081CP

Texas InstrumentsIn Stock: 88939TL081CP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TL081ACN is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Amplifier Type: J-FET (required for input impedance and bias current characteristics)
• Number of Circuits: 1 (single operational amplifier configuration)
• Package / Case: 8-DIP (0.300", 7.62mm) (physical and pin compatibility)
• Mounting Type: Through Hole (assembly process compatibility)
• Operating Temperature Range: 0°C to 70°C (minimum requirement)
• Voltage - Supply Span: Minimum 6V to Maximum 36V (power supply compatibility)

Allowable Parameter Variations: Substitute parts may exhibit different values in slew rate, gain bandwidth product, input bias current, input offset voltage, and supply current, provided they remain within acceptable ranges for the application and do not degrade system performance. All substitute parts must maintain RoHS3 compliance and REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The TL081CP, TL081ACP, and TL081BCP represent the most direct substitutes for the TL081ACN. All three are manufactured by Texas Instruments with active product status, ensuring long-term availability. These parts maintain identical package geometry, mounting type, and operating temperature range. The TL081CP offers the largest inventory (88,892 pieces) and identical electrical specifications to the main part. The TL081ACP and TL081BCP provide marginal variations in input bias current and input offset voltage while maintaining the same supply voltage range (7V to 36V) and supply current (1.4mA).

Secondary Substitutes (Acceptable with Design Review):

The TL071CP and TL071IP are functionally equivalent J-FET operational amplifiers in 8-DIP packages with active product status. Both exhibit higher gain bandwidth product (5.25 MHz versus 4 MHz) and higher input bias current (65 pA versus 20 pA). The TL071IP extends the operating temperature range to -40°C to 85°C, providing enhanced thermal performance. However, both TL071 variants require minimum supply voltage of 10V, which may restrict applications designed for lower supply voltages.

Alternative Substitute (Conditional Use):

The LF356N/NOPB, manufactured by Texas Instruments and designated as BI-FET™ series, operates as an active product with 17,483 pieces in inventory. This device maintains J-FET amplifier architecture and 8-DIP package compatibility. However, the LF356N/NOPB exhibits significantly higher supply current (5mA versus 1.4mA) and requires fixed supply voltage of 30V, making it suitable only for applications with adequate power budget and fixed supply voltage requirements.

Compliance and Regulatory Status:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the main part. All devices carry EAR99 export classification and identical HTSUS commodity codes (8542.33.0001).

Frequently Asked Questions (FAQ)

Q: Can the TL081CP directly replace the TL081ACN without circuit modification?

A: The TL081CP is pin-compatible and functionally equivalent within the specified electrical parameters. Direct substitution is permissible for applications operating within the TL081CP supply voltage range (7V to 36V). Applications requiring operation below 7V supply voltage require design review.

Q: What is the primary difference between TL081ACP and TL081BCP?

A: The TL081BCP specifies a lower input offset voltage (2mV versus 3mV). Both parts share identical slew rate (13V/µs), gain bandwidth product (3MHz), input bias current (30pA), and supply current (1.4mA). Selection between these variants depends on application offset voltage tolerance requirements.

Q: Why does the LF356N/NOPB have higher supply current than other substitutes?

A: The LF356N/NOPB is designated as BI-FET™ series, indicating a different internal architecture optimized for different performance characteristics. The 5mA supply current reflects this design approach. This device is suitable only for applications with adequate power dissipation capability.

Q: Is the TL071IP suitable for extended temperature range applications?

A: The TL071IP operates across -40°C to 85°C, compared to the TL081ACN range of 0°C to 70°C. However, the TL071IP requires minimum supply voltage of 10V. Applications requiring both extended temperature range and lower supply voltage operation must select alternative substitutes or conduct design modification.

Q: What are the package compatibility considerations for through-hole assembly?

A: All listed substitutes maintain identical 8-DIP (0.300", 7.62mm) package geometry and through-hole mounting type. No PCB layout or assembly process modifications are required for physical substitution.

Q: How does input bias current variation affect circuit performance?

A: The TL081ACN specifies 20pA input bias current, while most substitutes specify 30pA. The TL071 variants specify 65pA. Higher input bias current increases input offset voltage drift and may affect precision applications. Applications with stringent input bias current requirements should prioritize the TL081CP or LF356N/NOPB.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts carry ROHS3 compliance certification, matching the regulatory status of the main part. No compliance risk exists for substitution within regulated markets.

Q: What inventory considerations apply to substitute selection?

A: The TL081CP maintains the largest active inventory (88,892 pieces), followed by TL071CP (22,300 pieces) and LF356N/NOPB (17,483 pieces). Long-term availability is assured for all active-status parts. The main part TL081ACN, classified as obsolete, has limited remaining inventory (874 pieces).