TL061ID Equivalent & Substitute Parts Reference

Part Overview

The TL061ID is a J-FET input operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The TL061ID contains a single amplifier circuit optimized for applications requiring low input bias current and high input impedance characteristics inherent to J-FET technology. Due to its Last Time Buy status, identification of functionally equivalent substitute parts is necessary for design continuity and long-term component sourcing.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	1	—
Slew Rate	3.5	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	30	pA
Voltage - Input Offset	3	mV
Current - Supply	200	µA
Voltage - Supply Span (Min)	7	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TL061ID are categorized into two functional groups based on amplifier type and electrical parameter compatibility:

Group 1: J-FET Amplifier Substitutes (Direct Functional Equivalents)

These parts maintain identical amplifier type (J-FET), matching the core input stage architecture and low input bias current characteristic (30 pA). Substitutes in this group include TL061IDR, TL061ACDT, TL061CDT, and TL061IDT. All Group 1 substitutes share the following critical parameters with the main part:

Amplifier Type: J-FET
Slew Rate: 3.5 V/µs
Gain Bandwidth Product: 1 MHz
Input Bias Current: 30 pA
Input Offset Voltage: 3 mV
Supply Current: 200 µA
Package: 8-SOIC

Differences within Group 1 are limited to packaging format (Tube vs. Cut Tape/Digi-Reel vs. Tape & Reel), product status (Active vs. Last Time Buy), operating temperature range, and manufacturer source (Texas Instruments vs. STMicroelectronics).

Group 2: General Purpose Amplifier Substitutes (Functional Alternatives)

These parts employ general purpose amplifier architecture rather than J-FET input stages. This group includes MC33171DR2G, UA741CD, UA741CDT, UA741ID, and UA741IDT. Group 2 substitutes differ significantly in input bias current (10 nA to 80 nA versus 30 pA), slew rate (0.5 V/µs to 2.1 V/µs), and supply current characteristics. These parts are suitable only for applications where J-FET input characteristics are not mandatory and where the specified electrical parameter variations are acceptable.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA/nA)	Input Offset (mV)	Supply Current (µA)	Supply Span Min (V)	Supply Span Max (V)	Temp Range (°C)	Packaging	Status
TL061ID	Texas Instruments	J-FET	3.5	1	30 pA	3	200	7	36	-40 to 85	Tube	Last Time Buy
TL061IDR	Texas Instruments	J-FET	3.5	1	30 pA	3	200	7	36	-40 to 85	Cut Tape/Digi-Reel	Active
TL061ACDT	STMicroelectronics	J-FET	3.5	1	30 pA	3	200	6	36	0 to 70	Tape & Reel	Active
TL061CDT	STMicroelectronics	J-FET	3.5	1	30 pA	3	200	6	36	0 to 70	Cut Tape/Digi-Reel	Active
TL061IDT	STMicroelectronics	J-FET	3.5	1	30 pA	3	200	6	36	-40 to 105	Cut Tape/Digi-Reel	Active
MC33171DR2G	onsemi	General Purpose	2.1	1.8	20 nA	2	220	3	44	-40 to 85	Cut Tape/Digi-Reel	Active
UA741CD	Texas Instruments	General Purpose	0.5	1	80 nA	1	1700	7	36	0 to 70	Tube	Last Time Buy
UA741CDT	STMicroelectronics	General Purpose	0.5	1	10 nA	1	1700	10	44	0 to 70	Cut Tape/Digi-Reel	Active
UA741ID	STMicroelectronics	General Purpose	0.5	1	10 nA	1	1700	10	44	-40 to 105	Tube	Active
UA741IDT	STMicroelectronics	General Purpose	0.5	1	10 nA	1	1700	10	44	-40 to 105	Cut Tape/Digi-Reel	Active

Engineering Selection Recommendations

For Direct Replacement (J-FET Input Architecture Required)

When the application circuit depends on J-FET input characteristics—specifically the 30 pA input bias current and high input impedance—select from Group 1 substitutes: TL061IDR, TL061ACDT, TL061CDT, or TL061IDT. All Group 1 parts maintain electrical parameter equivalence with the TL061ID.

TL061IDR is the preferred primary substitute, manufactured by Texas Instruments with Active product status and identical electrical specifications to the TL061ID. This part is available in Cut Tape/Digi-Reel packaging with 18,558 units in stock.

For applications requiring extended operating temperature range (-40°C to 105°C), TL061IDT from STMicroelectronics provides this capability while maintaining all critical J-FET electrical parameters. TL061IDT is available in Cut Tape/Digi-Reel format with 2,439 units in stock.

For applications with operating temperature limited to 0°C to 70°C, TL061CDT or TL061ACDT from STMicroelectronics are suitable alternatives. Both maintain J-FET input characteristics and are available in Active status.

For Functional Alternative (General Purpose Amplifier Acceptable)

When application requirements do not mandate J-FET input stage characteristics and can tolerate higher input bias current (10 nA to 80 nA), Group 2 general purpose amplifier substitutes may be considered. These parts offer broader supply voltage ranges and in some cases improved availability.

UA741IDT from STMicroelectronics is recommended as the general purpose alternative, offering Active product status, extended temperature range (-40°C to 105°C), and 9,200 units in stock. This part operates with 10 nA input bias current and 1.7 mA supply current.

MC33171DR2G from onsemi provides the highest inventory availability (31,500 units) among all substitutes and offers improved slew rate (2.1 V/µs) and gain bandwidth product (1.8 MHz) compared to UA741 variants, though input bias current remains significantly higher than J-FET devices.

All recommended substitutes maintain RoHS3 compliance, MSL Level 1 rating, and 8-SOIC package compatibility with the TL061ID.

Frequently Asked Questions (FAQ)

Q: Can TL061IDR be used as a direct replacement for TL061ID in all applications?

A: Yes. TL061IDR maintains identical electrical specifications including J-FET amplifier type, 3.5 V/µs slew rate, 1 MHz gain bandwidth product, 30 pA input bias current, and 3 mV input offset voltage. Both parts operate across 7 V to 36 V supply range and are housed in 8-SOIC packages. The primary difference is packaging format (Cut Tape/Digi-Reel versus Tube) and product status (Active versus Last Time Buy). Electrical performance is equivalent.

Q: What is the difference between TL061CDT and TL061IDT?

A: Both parts are manufactured by STMicroelectronics and share identical J-FET electrical specifications. The primary difference is operating temperature range: TL061CDT operates from 0°C to 70°C, while TL061IDT operates from -40°C to 105°C. Select TL061IDT for applications requiring extended low-temperature or high-temperature operation. Both are available in Cut Tape/Digi-Reel packaging.

Q: Why do UA741 parts have significantly higher supply current than TL061 parts?

A: UA741 devices employ general purpose amplifier architecture with bipolar input stages, resulting in higher quiescent supply current (1.7 mA) compared to J-FET input devices (200 µA). This 8.5× difference reflects fundamental differences in input stage design. UA741 parts are suitable only for applications where J-FET input characteristics are not required.

Q: Can MC33171DR2G replace TL061ID in high-impedance input circuits?

A: No. MC33171DR2G is a general purpose amplifier with 20 nA input bias current, approximately 667 times higher than the TL061ID's 30 pA specification. This makes MC33171DR2G unsuitable for applications requiring high input impedance or extremely low input bias current. Use MC33171DR2G only when application circuits can tolerate nanoampere-level input bias current.

Q: What packaging options are available for TL061 J-FET substitutes?

A: TL061 J-FET substitutes are available in three packaging formats: Tube (TL061ID from Texas Instruments), Cut Tape/Digi-Reel (TL061IDR from Texas Instruments; TL061CDT and TL061IDT from STMicroelectronics), and Tape & Reel (TL061ACDT from STMicroelectronics). All use 8-SOIC package with 0.154" width (3.90 mm). Select packaging based on assembly process requirements and quantity needs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed—TL061IDR, TL061ACDT, TL061CDT, TL061IDT, MC33171DR2G, UA741CD, UA741CDT, UA741ID, and UA741IDT—are RoHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating. All parts are suitable for lead-free assembly processes.

Q: Which substitute has the best availability?

A: MC33171DR2G from onsemi has the highest inventory availability with 31,500 units in stock. However, this is a general purpose amplifier, not a J-FET device. Among J-FET substitutes, TL061IDR from Texas Instruments has the highest availability with 18,558 units in stock and is the recommended primary substitute for the TL061ID.

Q: Can I use TL061ACDT if my application requires -40°C operation?

A: No. TL061ACDT operates from 0°C to 70°C and is not rated for -40°C operation. For applications requiring -40°C minimum operating temperature, use TL061IDT (STMicroelectronics, -40°C to 105°C) or TL061IDR (Texas Instruments, -40°C to 85°C).

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