TL084IN Equivalent & Substitute Parts

Part Overview

The TL084IN is a J-FET input operational amplifier manufactured by STMicroelectronics, configured as a 4-circuit integrated circuit in a 14-DIP package. This device is classified as obsolete, indicating discontinued production and limited availability for new designs. The TL084IN serves applications requiring low input bias current, moderate slew rate performance, and operation across extended temperature ranges. Due to its obsolete status, identifying equivalent and substitute parts is necessary for design continuity, procurement alternatives, and long-term system reliability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	4	—
Slew Rate	16	V/µs
Gain Bandwidth Product	4	MHz
Current - Input Bias	20	pA
Voltage - Input Offset	3	mV
Current - Supply (x4 Channels)	1.4	mA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	6	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 125	°C
Package / Case	14-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
Grade	Automotive	—
Qualification	AEC-Q100	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TL084IN is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: J-FET input configuration for low input bias current performance
Number of Circuits: 4 independent operational amplifier circuits
Package / Case: 14-DIP (0.300", 7.62mm) form factor for mechanical compatibility
Mounting Type: Through Hole for PCB integration compatibility

Secondary Performance Criteria:

Slew Rate: Minimum 13 V/µs to maintain signal fidelity in dynamic applications
Gain Bandwidth Product: 4 MHz to preserve frequency response characteristics
Current - Input Bias: Maximum 50 pA to sustain low-impedance input performance
Voltage - Supply Span: Minimum 6 V to 36 V operating range for power supply flexibility
Operating Temperature: Extended range support (-40°C minimum) for industrial and automotive applications

Compliance Criteria:

RoHS3 Compliance for environmental regulatory adherence
Moisture Sensitivity Level: 1 (Unlimited) for standard handling and storage

Substitute parts are grouped into two categories: Direct J-FET Equivalents (matching amplifier type and performance tier) and General Purpose Alternatives (different amplifier topology with comparable functional capability).

Parameter Comparison

Parameter	TL084IN	AD713JNZ	LF347BN/NOPB	LF347N/NOPB	LF444ACN/NOPB	LF444CN/NOPB	AD704JNZ	LM2900N	LM248N	LM348N	NJM2060D#
Amplifier Type	J-FET	J-FET	J-FET	J-FET	J-FET	J-FET	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Slew Rate (V/µs)	16	20	13	13	1	1	0.1	20	0.5	0.5	4
Gain Bandwidth Product (MHz)	4	4	4	4	1	1	0.8	2.5	1.3	1	10
Current - Input Bias (pA)	20	10	50	50	10	10	100	30 nA	30 nA	30 nA	40 nA
Voltage - Input Offset (mV)	3	0.3	3	5	2	3	0.05	—	1	1	0.5
Current - Supply (mA)	1.4	10	7.2	7.2	0.6	0.6	1.5	6.2	2.1	2.1	9
Current - Output / Channel (mA)	40	25	—	—	14	14	15	18	25	25	—
Voltage - Supply Span Min (V)	6	9	36	36	44	36	4	4.4	44	44	8
Voltage - Supply Span Max (V)	36	36	36	36	44	36	36	32	44	44	36
Operating Temperature (°C)	-40 to 125	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 105	0 to 70	-20 to 75
Package / Case	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Last Time Buy	Obsolete	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

Direct J-FET Equivalents (Recommended Primary Substitutes):

The following parts maintain J-FET amplifier topology and are suitable for direct substitution in applications requiring low input bias current and high input impedance:

AD713JNZ (Analog Devices Inc.) — Active product status with superior slew rate (20 V/µs) and lower input bias current (10 pA). Operating temperature range limited to 0°C to 70°C. Suitable for non-automotive applications with extended performance requirements.

LF347BN/NOPB and LF347N/NOPB (Texas Instruments) — Active products with matching 4 MHz gain bandwidth product and 13 V/µs slew rate. Input bias current of 50 pA represents acceptable tolerance for most applications. Operating temperature range 0°C to 70°C. Supply voltage specification fixed at 36 V requires circuit design verification.

LF444ACN/NOPB and LF444CN/NOPB (Texas Instruments) — Active products with reduced slew rate (1 V/µs) and lower gain bandwidth product (1 MHz). Significantly reduced supply current (0.6 mA) suitable for power-constrained applications. LF444CN/NOPB offers highest inventory availability (16,259 units). Supply voltage specification fixed at 36 V.

General Purpose Alternatives (Secondary Substitutes):

These parts employ different amplifier topology but maintain 4-circuit configuration and 14-DIP packaging:

LM2900N (Texas Instruments) — Last Time Buy status with 20 V/µs slew rate and 2.5 MHz gain bandwidth product. General purpose topology with 30 nA input bias current. Operating temperature range -40°C to 85°C supports extended industrial applications. Supply voltage range 4.4 V to 32 V provides flexibility.

NJM2060D# (Nisshinbo Micro Devices Inc.) — Active product with 10 MHz gain bandwidth product and 4 V/µs slew rate. General purpose topology with 40 nA input bias current. Operating temperature range -20°C to 75°C. Supply voltage range 8 V to 36 V.

Obsolete Alternatives (Not Recommended for New Designs):

LM248N and LM348N are classified as obsolete. These parts are retained in this reference for legacy system maintenance only and are not suitable for new product development.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), ensuring compatibility with current manufacturing and environmental standards. The TL084IN carries automotive grade qualification (AEC-Q100), which is not matched by substitute parts. Applications requiring automotive qualification must retain the original TL084IN or pursue formal automotive qualification of substitute devices through the component manufacturer.

Frequently Asked Questions (FAQ)

Q: Can AD713JNZ directly replace TL084IN in all applications?

A: AD713JNZ maintains J-FET amplifier topology, 4-circuit configuration, and 14-DIP packaging. However, operating temperature range is limited to 0°C to 70°C compared to TL084IN's -40°C to 125°C. Minimum supply voltage is 9 V versus TL084IN's 6 V. Applications operating outside these ranges require alternative selection or circuit redesign.

Q: What is the primary difference between J-FET and General Purpose amplifier substitutes?

A: J-FET amplifiers (AD713JNZ, LF347 series, LF444 series) feature input bias current in the picoampere range (10-50 pA), suitable for high-impedance signal sources. General Purpose amplifiers (LM2900N, NJM2060D#) feature input bias current in the nanoampere range (30-40 nA), acceptable for moderate-impedance applications. Selection depends on input source impedance requirements.

Q: Are LF444ACN/NOPB and LF444CN/NOPB interchangeable?

A: Both parts are LF444 base product variants with identical electrical performance (1 V/µs slew rate, 1 MHz gain bandwidth product, 0.6 mA supply current). Primary difference is voltage input offset specification: LF444ACN/NOPB specifies 2 mV, LF444CN/NOPB specifies 3 mV. Both are suitable for applications tolerating 3 mV offset. LF444CN/NOPB offers significantly higher inventory availability.

Q: Why does LF347BN/NOPB specify fixed 36 V supply voltage instead of a range?

A: The provided data indicates Voltage - Supply Span (Min) and (Max) both as 36 V. This represents a data entry condition requiring clarification with the manufacturer. Standard LF347 devices operate across voltage ranges. Verify actual supply voltage requirements with Texas Instruments technical documentation before implementation.

Q: Is LM2900N suitable for new automotive designs?

A: LM2900N carries Last Time Buy status, indicating discontinued production with limited availability. This part is not suitable for new product development. For automotive applications, retain TL084IN or pursue alternative J-FET devices with active product status and automotive qualification.

Q: What packaging considerations apply to 14-DIP through-hole devices?

A: All listed substitute parts maintain 14-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical compatibility with existing PCB layouts. Pin configuration and functional assignment must be verified against individual device datasheets to confirm functional equivalence beyond physical form factor.

Q: Can NJM2060D# replace TL084IN in automotive applications?

A: NJM2060D# is a general purpose amplifier with active product status and 10 MHz gain bandwidth product. However, it lacks automotive grade qualification (AEC-Q100) and carries operating temperature range of -20°C to 75°C, which does not meet automotive extended temperature requirements (-40°C to 125°C). This part is not suitable for automotive applications requiring AEC-Q100 qualification.

Q: What is the significance of RoHS3 compliance for all listed parts?

A: ROHS3 compliance indicates conformance to Restriction of Hazardous Substances Directive 3, restricting lead, cadmium, mercury, and other hazardous materials. All listed parts meet this environmental standard, ensuring compatibility with current manufacturing processes and regulatory requirements across global markets.

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