TL061IN Equivalent & Substitute Parts

Part Overview

The TL061IN 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 2000 units remain in stock as new original inventory. The TL061IN 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 design continuity, long-term availability assurance, and system reliability in production environments.

Substiute Parts

TL061IN

STMicroelectronicsIn Stock: 2078TL061IN Datasheet

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TL061ACP

Texas InstrumentsIn Stock: 2235TL061ACP Datasheet

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TL061BCP

Texas InstrumentsIn Stock: 2449TL061BCP Datasheet

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TL061CP

Texas InstrumentsIn Stock: 6704TL061CP Datasheet

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TL061IP

Texas InstrumentsIn Stock: 1439TL061IP Datasheet

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TL081CP

Texas InstrumentsIn Stock: 88939TL081CP Datasheet

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UA741CP

Texas InstrumentsIn Stock: 28241UA741CP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TL061IN is determined by the following critical parameters:

Primary Substitution Criteria:

• Amplifier Type: J-FET (required for input bias current and offset voltage characteristics)
• Number of Circuits: 1 (single amplifier per package)
• Package / Case: 8-DIP (0.300", 7.62mm) (physical and electrical compatibility)
• Mounting Type: Through Hole (PCB assembly compatibility)
• Slew Rate: 3.5 V/µs (minimum acceptable performance)
• Gain Bandwidth Product: 1 MHz (minimum acceptable performance)
• Current - Input Bias: 30 pA (maximum acceptable value)
• Voltage - Input Offset: 3 mV (maximum acceptable value)
• Current - Supply: 200 µA (maximum acceptable value)
• Voltage - Supply Span: 6 V minimum to 36 V maximum (operating range compatibility)

Substitute parts must satisfy all primary criteria to ensure functional equivalence. Parts that exceed specified maximum values or fall below minimum values in critical parameters are classified as non-equivalent or require application-specific evaluation.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (TL061 Series - Texas Instruments):

The TL061ACP, TL061BCP, TL061CP, and TL061IP represent direct functional equivalents to the TL061IN. All four parts maintain identical J-FET amplifier architecture, slew rate (3.5 V/µs), gain bandwidth product (1 MHz), input bias current (30 pA), supply current (200 µA), and maximum supply voltage (36 V). These parts are manufactured by Texas Instruments and carry active product status, ensuring long-term availability and supply chain reliability.

The TL061BCP offers the lowest input offset voltage specification at 2 mV, compared to 3 mV for the TL061IN, TL061ACP, and TL061CP. The TL061IP supports the widest operating temperature range (-40°C to 85°C), closely matching the TL061IN's extended temperature capability (-40°C to 105°C). The TL061ACP, TL061BCP, and TL061CP operate within the commercial temperature range (0°C to 70°C).

All TL061 variants are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for modern manufacturing environments.

Higher Performance Alternative (TL081CP):

The TL081CP is a J-FET amplifier with enhanced performance characteristics. It maintains the same input bias current (30 pA) and input offset voltage (3 mV) as the TL061IN but provides significantly higher slew rate (13 V/µs) and gain bandwidth product (3 MHz). The TL081CP exhibits increased supply current consumption (1.4 mA versus 200 µA), which may impact power budget considerations in battery-powered or low-power applications. The TL081CP is suitable for applications requiring faster signal processing and wider bandwidth than the TL061IN specification permits.

Non-Equivalent Alternative (UA741CP):

The UA741CP is a general-purpose operational amplifier, not a J-FET input device. It exhibits significantly different electrical characteristics: input bias current of 80 nanoamperes (versus 30 picoamperes for the TL061IN), lower slew rate (0.5 V/µs), and higher supply current (1.7 mA). The UA741CP is not functionally equivalent to the TL061IN and is listed only for reference. Applications requiring J-FET input characteristics for low input bias current performance should not substitute the UA741CP for the TL061IN.

Compliance and Availability:

All recommended substitute parts (TL061ACP, TL061BCP, TL061CP, TL061IP) carry active product status with Texas Instruments, ensuring continued manufacturing and distribution. All parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory standards for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can the TL061ACP, TL061BCP, TL061CP, or TL061IP be used as direct replacements for the TL061IN?

A: Yes. The TL061ACP, TL061BCP, TL061CP, and TL061IP are functionally equivalent to the TL061IN. All five parts share identical J-FET amplifier architecture, slew rate (3.5 V/µs), gain bandwidth product (1 MHz), input bias current (30 pA), and supply current (200 µA). Pin configuration and package dimensions (8-DIP, 0.300" spacing) are identical, enabling direct PCB substitution. Operating temperature ranges differ; verify application temperature requirements before selection.

Q: What is the primary difference between TL061BCP and other TL061 variants?

A: The TL061BCP specifies a maximum input offset voltage of 2 mV, compared to 3 mV for the TL061ACP, TL061CP, and TL061IN. This represents improved input offset voltage performance. All other electrical parameters remain identical across the TL061 series.

Q: Why is the TL061IP recommended for extended temperature applications?

A: The TL061IP operates across the temperature range -40°C to 85°C, providing extended low-temperature capability compared to the commercial-grade TL061ACP, TL061BCP, and TL061CP (0°C to 70°C). The TL061IN operates to 105°C; the TL061IP does not fully match this upper temperature limit but provides superior low-temperature performance among active TL061 variants.

Q: Is the TL081CP a suitable substitute for the TL061IN?

A: The TL081CP is not a direct equivalent. While both are J-FET input amplifiers in 8-DIP packages, the TL081CP provides higher slew rate (13 V/µs versus 3.5 V/µs) and higher gain bandwidth product (3 MHz versus 1 MHz). The TL081CP also exhibits higher supply current consumption (1.4 mA versus 200 µA). The TL081CP is suitable only for applications requiring enhanced bandwidth and slew rate performance and where increased power consumption is acceptable.

Q: Can the UA741CP replace the TL061IN?

A: No. The UA741CP is a general-purpose operational amplifier with fundamentally different input characteristics. The UA741CP exhibits input bias current of 80 nanoamperes, compared to 30 picoamperes for the TL061IN. This 2,667-fold difference in input bias current makes the UA741CP unsuitable for applications requiring the low input bias current performance of J-FET input amplifiers. The UA741CP should not be substituted for the TL061IN.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (TL061ACP, TL061BCP, TL061CP, TL061IP, TL081CP, and UA741CP) are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for electronic component procurement and manufacturing.

Q: What is the minimum supply voltage for TL061 variants compared to the TL061IN?

A: The TL061IN specifies a minimum supply voltage of 6 V. All TL061 variants (TL061ACP, TL061BCP, TL061CP, TL061IP) specify a minimum supply voltage of 7 V. Applications operating at 6 V supply voltage require the TL061IN or equivalent parts rated for 6 V minimum operation. The TL081CP and UA741CP also specify 7 V minimum supply voltage.

Q: Are there packaging differences between the TL061IN and substitute parts?

A: All parts are housed in 8-DIP packages with 0.300" (7.62 mm) lead spacing. The TL061IN is supplied in standard DIP packaging. Texas Instruments TL061 variants are supplied in 8-PDIP (plastic DIP) packaging. Both package types are mechanically and electrically compatible for through-hole PCB assembly. No modifications to PCB footprints or assembly procedures are required.