TL974ING4 Equivalent & Substitute Parts

Part Overview

The TL974ING4 is a general purpose operational amplifier integrated circuit manufactured by Texas Instruments, featuring four independent amplifier circuits in a 14-pin DIP package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. The TL974ING4 operates across a wide supply voltage range of 2.7V to 12V with rail-to-rail output capability, making it suitable for low-power analog signal processing applications.

Substiute Parts

TL974ING4

Texas InstrumentsIn Stock: 762TL974ING4 Datasheet

Current PartRFQ

TL974IN

Texas InstrumentsIn Stock: 1242TL974IN Datasheet

MFR RecommendedRFQ

OP491GPZ

Analog Devices Inc.In Stock: 3216OP491GPZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL974ING4 is determined by strict equivalence across the following critical parameters: amplifier type (general purpose), number of circuits (4), output type (rail-to-rail), package type (14-DIP through-hole), supply voltage range (2.7V to 12V minimum), and operating temperature range (-40°C to 125°C).

The substitute parts identified are grouped into two categories:

Category 1: Direct Functional Equivalent TL974IN meets all critical substitution criteria with identical electrical specifications and package configuration. This part differs only in product status (active versus obsolete) and packaging format (tube versus unspecified for the main part).

Category 2: Functional Substitute with Parameter Variations OP491GPZ from Analog Devices Inc. maintains compatibility across package type, mounting method, supply voltage range, and operating temperature. However, this part exhibits reduced performance in slew rate (0.5V/µs versus 5V/µs), gain bandwidth product (3 MHz versus 12 MHz), input bias current (30 nA versus 200 nA), and output current per channel (16 mA versus 80 mA). The OP491GPZ is suitable only for applications where these reduced specifications are acceptable.

Parameter Comparison

Engineering Selection Recommendations

TL974IN Selection Criteria

The TL974IN is the primary substitute for the obsolete TL974ING4. Both parts are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications. The TL974IN carries active product status, ensuring continued availability and manufacturing support. This part is suitable for direct replacement in all applications previously designed with the TL974ING4, with no circuit modifications required. Both parts maintain ROHS3 compliance and REACH unaffected status.

OP491GPZ Selection Criteria

The OP491GPZ from Analog Devices Inc. is a functional substitute suitable only for applications where reduced performance specifications are acceptable. This part exhibits lower slew rate, reduced gain bandwidth product, lower input bias current, and reduced output current per channel compared to the TL974ING4. The OP491GPZ is appropriate for low-speed signal conditioning, precision measurement circuits, and applications where lower power consumption is prioritized over dynamic performance. The OP491GPZ maintains identical package configuration, supply voltage range, and operating temperature range, enabling mechanical and thermal compatibility.

Frequently Asked Questions (FAQ)

Q: Can TL974IN be used as a direct replacement for TL974ING4?

A: Yes. The TL974IN is a direct functional equivalent with identical electrical specifications, package type, and operating parameters. No circuit modifications are required for substitution.

Q: What are the key differences between TL974ING4 and OP491GPZ?

A: The primary differences are slew rate (5V/µs versus 0.5V/µs), gain bandwidth product (12 MHz versus 3 MHz), input bias current (200 nA versus 30 nA), and output current per channel (80 mA versus 16 mA). Both parts share identical package configuration and supply voltage range.

Q: Is OP491GPZ suitable for high-speed applications?

A: No. The OP491GPZ has reduced slew rate and gain bandwidth product, making it unsuitable for high-speed signal processing. It is appropriate for low-frequency and precision analog applications.

Q: Are all substitute parts through-hole mounted?

A: Yes. Both TL974IN and OP491GPZ are configured in 14-DIP through-hole packages identical to the TL974ING4, enabling direct socket compatibility.

Q: Do substitute parts maintain the same supply voltage range?

A: Yes. Both TL974IN and OP491GPZ operate across the 2.7V to 12V supply voltage range, matching the TL974ING4 specifications.

Q: What is the operating temperature range for substitute parts?

A: Both substitute parts operate across -40°C to 125°C, identical to the TL974ING4.

Q: Are substitute parts RoHS and REACH compliant?

A: Yes. Both TL974IN and OP491GPZ are ROHS3 compliant and REACH unaffected, matching the compliance status of the TL974ING4.

Q: Why is TL974ING4 classified as obsolete?

A: The TL974ING4 has been discontinued by Texas Instruments. The active equivalent TL974IN is available as the recommended replacement for continued production and new designs.