TL084CNG4 Equivalent & Substitute Parts

Part Overview

The TL084CNG4 is a J-FET input operational amplifier featuring four independent circuits in a 14-DIP package, manufactured by Texas Instruments. This device is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design requirements and production continuity. The TL084CNG4 serves applications requiring low input bias current and moderate bandwidth characteristics typical of J-FET amplifier designs.

Substiute Parts

TL084CNG4

Texas InstrumentsIn Stock: 1182TL084CNG4 Datasheet

Current PartRFQ

TL084CN

STMicroelectronicsIn Stock: 25130TL084CN Datasheet

MFR RecommendedRFQ

OP497GPZ

Analog Devices Inc.In Stock: 1536OP497GPZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TL084CNG4 is determined by the following critical parameters:

Primary Substitution Criteria:

• Number of circuits: 4 independent amplifier channels
• Package type: 14-DIP through-hole configuration
• Supply voltage range compatibility: Minimum 10 V to maximum 30 V
• Amplifier classification: J-FET input type

Secondary Compatibility Factors:

• Input bias current characteristics
• Slew rate and gain bandwidth product
• Output current capability per channel
• Operating temperature range
• RoHS and regulatory compliance status

The TL084CN (STMicroelectronics) qualifies as a direct J-FET substitute with identical circuit count and package, offering improved electrical performance within the specified supply voltage range. The OP497GPZ (Analog Devices Inc.) represents a functional alternative with different amplifier topology (general purpose rather than J-FET), requiring evaluation for specific application requirements due to differing electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

TL084CN (STMicroelectronics) - Primary Substitute:

The TL084CN is the recommended direct substitute for the TL084CNG4. Both devices share identical J-FET amplifier topology, four-circuit configuration, and 14-DIP package format. The TL084CN demonstrates superior electrical performance with increased slew rate (16 V/µs versus 13 V/µs) and reduced input bias current (20 pA versus 30 pA). The TL084CN supports an extended supply voltage range (6 V to 36 V) that encompasses the original device specification (10 V to 30 V). Both components maintain ROHS3 compliance and identical operating temperature range. The TL084CN carries AEC-Q100 automotive qualification, indicating enhanced reliability validation. Current inventory availability (25,100 units) supports production requirements.

OP497GPZ (Analog Devices Inc.) - Functional Alternative:

The OP497GPZ provides functional amplification in a four-circuit, 14-DIP through-hole package with ROHS3 compliance. This device differs fundamentally in amplifier topology (general purpose versus J-FET input), resulting in significantly different electrical characteristics. The OP497GPZ exhibits lower slew rate (0.15 V/µs), reduced gain bandwidth product (0.5 MHz), and higher input bias current (60 pA). The OP497GPZ offers extended operating temperature range (-40°C to 85°C) and active product status. Selection of the OP497GPZ requires verification that application requirements accommodate the altered electrical performance profile and that circuit design parameters remain compatible with general-purpose amplifier characteristics.

Frequently Asked Questions (FAQ)

Q: Can the TL084CN directly replace the TL084CNG4 without circuit modification?

A: The TL084CN is pin-compatible and functionally equivalent as a J-FET four-circuit amplifier in 14-DIP packaging. Both devices operate within overlapping supply voltage ranges and maintain identical circuit count. The TL084CN's improved electrical performance (higher slew rate, lower input bias current) is compatible with applications designed for the TL084CNG4. No circuit modification is required for direct substitution.

Q: What are the key differences between the TL084CN and OP497GPZ?

A: The TL084CN maintains J-FET amplifier topology identical to the original TL084CNG4, while the OP497GPZ employs general-purpose amplifier architecture. This fundamental difference results in distinct electrical characteristics: the TL084CN provides 3 MHz gain bandwidth product and 16 V/µs slew rate, whereas the OP497GPZ delivers 0.5 MHz bandwidth and 0.15 V/µs slew rate. Input bias current differs significantly (20 pA for TL084CN versus 60 pA for OP497GPZ). Application-specific circuit requirements determine whether the OP497GPZ represents a viable alternative.

Q: Is the OP497GPZ suitable for applications originally designed for the TL084CNG4?

A: The OP497GPZ shares identical package format and four-circuit configuration but differs substantially in amplifier type and electrical performance. Applications requiring J-FET input characteristics, high slew rate, or specific gain bandwidth product specifications may not function correctly with the OP497GPZ. Detailed circuit analysis and performance verification are necessary to determine compatibility for specific applications.

Q: What packaging considerations apply to these substitutes?

A: All three devices (TL084CNG4, TL084CN, OP497GPZ) utilize 14-DIP through-hole packaging with 0.300-inch (7.62mm) pitch. Pin configuration and footprint are identical across all three components, enabling direct physical substitution on printed circuit boards designed for the original TL084CNG4.

Q: Are there supply voltage compatibility issues when substituting these devices?

A: The TL084CNG4 operates within 10 V to 30 V supply range. The TL084CN supports 6 V to 36 V, fully encompassing the original specification. The OP497GPZ operates within 4 V to 40 V range. Existing circuit designs operating within the 10 V to 30 V window remain compatible with both substitute devices. Designs utilizing supply voltages below 10 V require verification that the TL084CN's lower minimum specification (6 V) aligns with circuit requirements.

Q: What is the significance of the TL084CN's AEC-Q100 qualification?

A: AEC-Q100 qualification indicates the TL084CN has undergone automotive-grade reliability testing and validation. This certification demonstrates enhanced quality assurance and reliability characteristics suitable for demanding applications. The original TL084CNG4 does not carry this qualification, making the TL084CN a higher-reliability alternative for applications requiring automotive-grade components.