TL084CPW Equivalent & Substitute Parts

Part Overview

The TL084CPW is a J-FET input operational amplifier containing four independent circuits in a 14-TSSOP surface mount package, manufactured by Texas Instruments. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The TL084CPW operates across a 10V to 30V supply range and is suitable for applications requiring low input bias current and moderate bandwidth performance. Due to its Last Time Buy status, identifying functionally equivalent substitute parts is essential for design continuity and long-term component sourcing.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	4	—
Slew Rate	13	V/µs
Gain Bandwidth Product	3	MHz
Current - Input Bias	30	pA
Voltage - Input Offset	3	mV
Current - Supply (x4 Channels)	1.4	mA
Current - Output / Channel	10	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	0 to 70	°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TL084CPW are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Package type: 14-TSSOP surface mount configuration
Number of circuits: 4 independent amplifier circuits
Supply voltage range: Minimum 10V to maximum 30V overlap
Mounting type: Surface mount
Physical dimensions: 14-TSSOP (0.173", 4.40mm Width)

Substitution Categories:

Category 1: Direct Packaging Equivalents (Same Manufacturer, Different Packaging) TL084CPWR and TL084CPT are Texas Instruments J-FET amplifiers with identical electrical specifications to the TL084CPW but offered in alternative packaging formats (Cut Tape & Digi-Reel and Cut Tape respectively). These maintain the same amplifier type, circuit count, and core performance characteristics.

Category 2: Cross-Manufacturer J-FET Alternatives TL084IPT (STMicroelectronics) is a J-FET amplifier with enhanced performance specifications including higher slew rate (16V/µs vs 13V/µs), higher gain bandwidth product (4MHz vs 3MHz), and extended output current capability (40mA vs 10mA). This part qualifies as a substitute due to superior electrical performance within the same package and amplifier topology.

Category 3: General Purpose Amplifier Alternatives ADA4077-4ARUZ, ADA4077-4ARUZ-R7, and ADA4077-4ARUZ-RL (Analog Devices Inc.) are general purpose operational amplifiers in 14-TSSOP packaging. These parts differ in amplifier type (general purpose vs J-FET) and exhibit different electrical characteristics including lower input bias current (400pA vs 30pA), lower slew rate (1.2V/µs vs 13V/µs), and extended operating temperature range (-40°C to 125°C vs 0°C to 70°C). Substitution is valid where general purpose amplifier performance meets application requirements.

Parameter Comparison

Parameter	TL084CPW	TL084CPWR	TL084CPT	TL084IPT	ADA4077-4ARUZ	ADA4077-4ARUZ-R7	ADA4077-4ARUZ-RL
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	J-FET	J-FET	J-FET	J-FET	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4
Slew Rate (V/µs)	13	13	16	16	1.2	1.2	1.2
Gain Bandwidth Product (MHz)	3	3	4	4	3.6	3.6	3.6
Current - Input Bias (pA)	30	30	20	20	400	400	400
Voltage - Input Offset (mV)	3	3	3	3	0.015	0.015	0.015
Current - Supply (mA, x4 Channels)	1.4	1.4	1.4	1.4	0.4	0.4	0.4
Current - Output / Channel (mA)	10	10	40	40	10	10	10
Voltage - Supply Span Min (V)	10	10	6	6	5	5	5
Voltage - Supply Span Max (V)	30	30	36	36	30	30	30
Operating Temperature (°C)	0 to 70	0 to 70	0 to 70	-40 to 105	-40 to 125	-40 to 125	-40 to 125
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

TL084CPWR is the primary recommended substitute for TL084CPW. Both parts are manufactured by Texas Instruments with identical J-FET amplifier specifications, electrical performance, and operating characteristics. The distinction is packaging format: TL084CPWR is supplied in Cut Tape & Digi-Reel format versus the Tube packaging of TL084CPW. This substitute is suitable for all applications where the original TL084CPW was specified. Product status is Active, ensuring long-term availability.

For Enhanced Performance Within J-FET Architecture:

TL084CPT and TL084IPT (STMicroelectronics) offer improved electrical performance compared to TL084CPW while maintaining J-FET amplifier topology. Both parts feature higher slew rate (16V/µs vs 13V/µs), higher gain bandwidth product (4MHz vs 3MHz), and increased output current capability (40mA vs 10mA). TL084IPT extends the operating temperature range to -40°C to 105°C and carries AEC-Q100 automotive qualification. These substitutes are applicable in applications where enhanced performance specifications provide design margin or where extended temperature operation is required.

For General Purpose Amplifier Applications:

ADA4077-4ARUZ, ADA4077-4ARUZ-R7, and ADA4077-4ARUZ-RL (Analog Devices Inc.) are general purpose operational amplifiers suitable for substitution in applications where J-FET input characteristics are not critical. These parts offer significantly lower input bias current (400pA vs 30pA), lower input offset voltage (15µV vs 3mV), and extended operating temperature range (-40°C to 125°C). The trade-off is substantially lower slew rate (1.2V/µs vs 13V/µs) and reduced supply current efficiency. Substitution is valid only where application bandwidth and slew rate requirements are compatible with 1.2V/µs performance.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original TL084CPW specifications. All parts are classified under ECCN EAR99 and HTSUS 8542.33.0001. TL084CPT and TL084IPT carry AEC-Q100 automotive qualification, suitable for automotive-grade applications.

Frequently Asked Questions (FAQ)

Q: Can TL084CPWR be used as a direct replacement for TL084CPW?

A: Yes. TL084CPWR is electrically and functionally identical to TL084CPW. Both are Texas Instruments J-FET operational amplifiers with four circuits in 14-TSSOP packaging. The only difference is packaging format: TL084CPWR is supplied in Cut Tape & Digi-Reel format while TL084CPW is supplied in Tube. Electrical performance, pin configuration, and operating specifications are identical. TL084CPWR is Active status, ensuring continued availability.

Q: What is the difference between TL084CPT and TL084IPT?

A: Both are STMicroelectronics J-FET amplifiers with identical electrical specifications and 14-TSSOP packaging. The primary difference is operating temperature range: TL084CPT operates from 0°C to 70°C, while TL084IPT operates from -40°C to 105°C. TL084IPT is suitable for extended temperature applications and carries AEC-Q100 automotive qualification. Both parts feature higher performance than TL084CPW (16V/µs slew rate, 4MHz bandwidth, 40mA output current).

Q: Can ADA4077-4ARUZ replace TL084CPW in all applications?

A: No. ADA4077-4ARUZ is a general purpose amplifier, not a J-FET amplifier. While both are four-circuit operational amplifiers in 14-TSSOP packaging, the ADA4077-4ARUZ has significantly different electrical characteristics: 1.2V/µs slew rate (vs 13V/µs), 400pA input bias current (vs 30pA), and lower supply current (0.4mA vs 1.4mA). Substitution is valid only in applications where these performance differences are acceptable and where the lower slew rate does not compromise circuit function.

Q: Why does TL084IPT have higher output current than TL084CPW?

A: TL084IPT is manufactured by STMicroelectronics while TL084CPW is manufactured by Texas Instruments. Although both use J-FET input architecture and share the same base product number (TL084), STMicroelectronics' implementation provides 40mA output current per channel versus 10mA for the Texas Instruments version. This enhanced capability is provided within the same 14-TSSOP package and represents improved performance for applications requiring higher output drive capability.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (TL084CPWR, TL084CPT, TL084IPT, ADA4077-4ARUZ, ADA4077-4ARUZ-R7, ADA4077-4ARUZ-RL) are ROHS3 compliant and maintain MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original TL084CPW specifications.

Q: What is the significance of Last Time Buy status for TL084CPW?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of TL084CPW and will not accept new orders after a specified date. Existing inventory is limited (3360 Pcs noted). This status necessitates identifying substitute parts for design continuity. TL084CPWR (Active status) is the recommended alternative from the same manufacturer, while TL084CPT, TL084IPT, and ADA4077 variants provide additional sourcing options.

Q: Can the packaging format difference between TL084CPW (Tube) and TL084CPWR (Cut Tape & Digi-Reel) affect circuit performance?

A: No. Packaging format (Tube vs Cut Tape & Digi-Reel) affects only component handling, storage, and assembly processes. It does not affect electrical performance, pin configuration, or functional characteristics. Both formats contain identical die and internal circuitry.

Q: What is the -3dB Bandwidth specification listed for ADA4077 parts?

A: The -3dB Bandwidth of 5.5MHz for ADA4077 parts represents the frequency at which the amplifier's gain drops 3dB below its DC gain. This is a characteristic of general purpose amplifier design. The Gain Bandwidth Product (3.6MHz) represents the product of DC gain and bandwidth. This specification is not provided for TL084 variants in the available data.

Q: Are there temperature-related restrictions when substituting TL084CPW with extended-range parts?

A: No restrictions exist for substituting with extended-range parts in applications operating within TL084CPW's original 0°C to 70°C range. TL084IPT (-40°C to 105°C) and ADA4077 variants (-40°C to 125°C) are fully functional and rated within the original operating range. Extended temperature capability provides additional design margin for applications that may experience temperature extremes.

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