TL084IDRE4 Equivalent & Substitute Parts

Part Overview

The TL084IDRE4 is a J-FET input operational amplifier containing four independent circuits in a 14-SOIC surface mount package, manufactured by Texas Instruments. This device is classified as obsolete product status. The TL084IDRE4 operates across a supply voltage range of 10V to 30V with a slew rate of 13V/µs and gain bandwidth product of 3 MHz. Due to its obsolete status, equivalent substitute parts with active product status are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Amplifier Type	J-FET
Number of Circuits	4
Slew Rate	13V/µs
Gain Bandwidth Product	3 MHz
Current - Input Bias	30 pA
Voltage - Input Offset	3 mV
Current - Supply	1.4mA (x4 Channels)
Current - Output / Channel	10 mA
Voltage - Supply Span (Min)	10 V
Voltage - Supply Span (Max)	30 V
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TL084IDRE4 is determined by the following critical parameters: amplifier type (J-FET), number of circuits (4), package type (14-SOIC), mounting type (surface mount), and electrical specifications including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current per channel, and supply voltage range.

The substitute parts are grouped into two categories based on substitution compatibility:

Category 1: Direct J-FET Amplifier Substitutes Parts maintaining J-FET amplifier topology with four circuits in 14-SOIC package. These include TL084IDR (Texas Instruments), ADTL084ARZ (Analog Devices Inc.), LF247DT, LF347D, LF347DT, TL074IYDT, TL084ACDT, and TL084AIDT (STMicroelectronics). These parts share the core J-FET architecture and are electrically compatible within specified parameter ranges.

Category 2: General Purpose Amplifier Substitutes Parts with general purpose amplifier topology in 14-SOIC package. These include NCV33074DR2G (onsemi) and SC2902DG (onsemi). These parts differ in amplifier type classification but maintain four-circuit configuration and 14-SOIC packaging.

Substitution eligibility is based on matching package type, circuit count, mounting type, and operating within the electrical parameter specifications of the original device.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Product Status
TL084IDRE4	Texas Instruments	J-FET	13	3	30	3	1.4	10	10	30	-40 ~ 85	Obsolete
TL084IDR	Texas Instruments	J-FET	13	3	30	3	1.4	10	10	30	-40 ~ 85	Active
ADTL084ARZ	Analog Devices Inc.	J-FET	20	5	2	1.5	1.2	27	8	36	-40 ~ 125	Active
LF247DT	STMicroelectronics	J-FET	16	4	20	3	1.4	40	44	44	-40 ~ 105	Active
LF347D	STMicroelectronics	J-FET	16	3	20	3	1.4	40	44	44	0 ~ 70	Active
LF347DT	STMicroelectronics	J-FET	16	4	20	3	1.4	40	44	44	0 ~ 70	Active
NCV33074DR2G	onsemi	General Purpose	13	4.5	100	1	1.9	30	3	44	-40 ~ 85	Active
SC2902DG	onsemi	General Purpose	—	—	90	2	—	40	3	32	-40 ~ 105	Active
TL074IYDT	STMicroelectronics	J-FET	13	3	20	3	1.4	40	6	36	-40 ~ 105	Active
TL084ACDT	STMicroelectronics	J-FET	16	4	20	3	1.4	40	6	36	0 ~ 70	Active
TL084AIDT	STMicroelectronics	J-FET	16	4	20	3	1.4	40	6	36	-40 ~ 105	Active

Engineering Selection Recommendations

Primary Substitute: TL084IDR The TL084IDR (Texas Instruments) provides identical electrical specifications to the TL084IDRE4 with active product status. This part maintains J-FET amplifier topology, four circuits, and equivalent parameter values across all critical specifications. The TL084IDR is the direct functional replacement with the highest compatibility.

Secondary Substitutes: TL074IYDT and TL084AIDT Both STMicroelectronics parts maintain J-FET amplifier topology with four circuits and are ROHS3 compliant. The TL074IYDT offers extended operating temperature range (-40°C to 105°C) with identical slew rate and gain bandwidth product to the original part. The TL084AIDT provides automotive qualification (AEC-Q100) with extended temperature range (-40°C to 105°C) and improved output current capability (40 mA vs. 10 mA).

Alternative Substitutes: LF247DT and LF347DT STMicroelectronics LF247DT and LF347DT maintain J-FET amplifier topology with four circuits and ROHS3 compliance. Both parts offer higher output current capability (40 mA) and extended operating temperature ranges. The LF247DT supports -40°C to 105°C operation.

Enhanced Performance Option: ADTL084ARZ Analog Devices Inc. ADTL084ARZ provides superior electrical performance with higher slew rate (20V/µs vs. 13V/µs), higher gain bandwidth product (5 MHz vs. 3 MHz), lower input bias current (2 pA vs. 30 pA), and extended operating temperature range (-40°C to 125°C). This part is suitable for applications requiring enhanced performance specifications.

General Purpose Alternatives: NCV33074DR2G and SC2902DG onsemi NCV33074DR2G and SC2902DG are general purpose amplifiers with four circuits in 14-SOIC package. The NCV33074DR2G includes automotive qualification (AEC-Q100) and operates across -40°C to 85°C. The SC2902DG supports -40°C to 105°C operation. These parts differ in amplifier type classification and should be evaluated for application-specific compatibility.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and 14-SOIC surface mount packaging consistent with the original device.

Frequently Asked Questions (FAQ)

Q: Can TL084IDR directly replace TL084IDRE4 in existing designs? A: Yes. The TL084IDR provides identical electrical specifications and J-FET amplifier topology. Both parts maintain the same supply voltage range (10V to 30V), slew rate (13V/µs), gain bandwidth product (3 MHz), and operating temperature range (-40°C to 85°C). The primary difference is product status: TL084IDRE4 is obsolete while TL084IDR is active.

Q: What is the difference between J-FET and General Purpose amplifier types? A: J-FET amplifiers use junction field-effect transistor input stages, providing extremely low input bias current (typically in the picoampere range). General purpose amplifiers use bipolar input stages with higher input bias current (typically in the nanoampere range). For applications requiring low input bias current, J-FET types are preferred.

Q: Are the STMicroelectronics TL084ACDT and TL084AIDT suitable replacements? A: Both parts are suitable with considerations. TL084ACDT operates 0°C to 70°C and includes automotive qualification (AEC-Q100). TL084AIDT operates -40°C to 105°C and also includes automotive qualification. Both offer improved slew rate (16V/µs vs. 13V/µs) and higher output current (40 mA vs. 10 mA). Verify operating temperature requirements for your application.

Q: What are the packaging differences among substitute parts? A: All substitute parts use 14-SOIC surface mount package with 0.154" width (3.90mm). Packaging variations exist in supplier delivery format: Cut Tape (CT) & Digi-Reel®, Tube, or Tape & Reel (TR). These differences affect procurement and handling but do not impact electrical compatibility or board-level integration.

Q: Can ADTL084ARZ be used as a drop-in replacement? A: ADTL084ARZ is electrically compatible but offers enhanced specifications. It provides higher slew rate (20V/µs), higher gain bandwidth product (5 MHz), lower input bias current (2 pA), and extended temperature range (-40°C to 125°C). The wider supply voltage range (8V to 36V) accommodates the original 10V to 30V requirement. Verify that enhanced performance does not introduce unintended circuit behavior in your application.

Q: Should I consider NCV33074DR2G or SC2902DG for new designs? A: These general purpose amplifiers differ from the original J-FET type. Selection depends on application requirements. NCV33074DR2G includes automotive qualification (AEC-Q100) and operates -40°C to 85°C. SC2902DG supports -40°C to 105°C operation. Both maintain four-circuit configuration and 14-SOIC packaging. Evaluate input bias current requirements: general purpose types have higher input bias current (90-100 nA) compared to J-FET types (2-30 pA).

Q: What compliance certifications are maintained across all substitute parts? A: All substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and REACH unaffected status. Automotive-qualified options (TL084ACDT, TL084AIDT, NCV33074DR2G) include AEC-Q100 qualification. All parts carry EAR99 ECCN classification and 8542.33.0001 HTSUS code.

Q: How do supply voltage ranges affect substitution? A: The original TL084IDRE4 operates 10V to 30V. Substitute parts offer varying ranges: TL084IDR (10V-30V), ADTL084ARZ (8V-36V), LF247DT/LF347DT (44V fixed), TL074IYDT (6V-36V), TL084ACDT/TL084AIDT (6V-36V), NCV33074DR2G (3V-44V), SC2902DG (3V-32V). Verify that your circuit's supply voltage falls within the substitute part's specified range.

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