TL4581PSR Equivalent & Substitute Parts

Part Overview

The TL4581PSR is a dual-channel audio amplifier integrated circuit manufactured by Texas Instruments in 8-SOIC surface mount packaging. This device is classified as obsolete, indicating it is no longer in active production. The TL4581PSR operates across a 10V to 30V supply range and delivers 38mA per output channel, making it suitable for audio amplification applications requiring dual-circuit configurations.

Due to its obsolete status, locating new original inventory of the TL4581PSR presents supply chain challenges. Equivalent and substitute parts listed in this reference provide active alternatives that maintain functional compatibility through matching electrical specifications and package form factors.

Substiute Parts

TL4581PSR

Texas InstrumentsIn Stock: 976TL4581PSR Datasheet

Current PartRFQ

AD8672ARZ

Analog Devices Inc.In Stock: 5443AD8672ARZ Datasheet

MFR RecommendedRFQ

AD8672ARZ-REEL

Analog Devices Inc.In Stock: 100479AD8672ARZ-REEL Datasheet

MFR RecommendedRFQ

AD8672ARZ-REEL7

Analog Devices Inc.In Stock: 15910AD8672ARZ-REEL7 Datasheet

MFR RecommendedRFQ

LM833DR2G

onsemiIn Stock: 45901LM833DR2G Datasheet

MFR RecommendedRFQ

NCV833DR2G

onsemiIn Stock: 3922NCV833DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL4581PSR is determined by the following critical parameters:

Functional Compatibility Criteria:

• Dual-circuit configuration (2 circuits required)
• Audio amplifier classification
• Gain bandwidth product of 10 MHz or greater
• Supply voltage range encompassing minimum 10V to maximum 30V
• Surface mount 8-SOIC package form factor
• Output current capability of 38mA per channel or greater

Compliance & Availability Criteria:

• Active product status (currently manufactured and in stock)
• ROHS3 compliance certification
• Moisture sensitivity level MSL 1 (unlimited shelf life)

The substitute parts are grouped into two categories based on amplifier type classification:

Category 1: General Purpose Amplifiers (AD8672 Series) The AD8672ARZ, AD8672ARZ-REEL, and AD8672ARZ-REEL7 variants are general purpose operational amplifiers with dual-circuit configuration. These devices meet the electrical requirements through matching gain bandwidth product (10 MHz), supply voltage range (10V to 36V), and 8-SOIC package specifications. All three variants represent the same base product (AD8672) differentiated only by packaging format.

Category 2: Audio Amplifiers (onsemi Series) The LM833DR2G and NCV833DR2G are audio amplifier integrated circuits from onsemi. These devices maintain audio amplifier classification matching the TL4581PSR, with dual-circuit configuration, 8-SOIC package form factor, and supply voltage range compatibility (10V to 36V). The LM833DR2G provides enhanced gain bandwidth product (15 MHz) and slew rate (7V/µs) compared to the original specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LM833DR2G (onsemi)

The LM833DR2G is the preferred substitute for the TL4581PSR based on the following factors:

• Amplifier Type Alignment: Both devices are classified as audio amplifiers, maintaining functional equivalence in audio signal processing applications
• Dual-Circuit Configuration: Both provide two independent amplifier circuits in a single package
• Supply Voltage Compatibility: The LM833DR2G operates across 10V to 36V, encompassing the TL4581PSR operating range of 10V to 30V
• Active Product Status: The LM833DR2G is currently manufactured and maintains 45,855 pieces in stock inventory, ensuring supply chain continuity
• Compliance Certification: ROHS3 compliant with MSL 1 moisture sensitivity rating, matching the original device specifications
• Enhanced Performance: The LM833DR2G provides superior gain bandwidth product (15 MHz versus 10 MHz) and slew rate (7V/µs versus 9V/µs), offering improved performance margins

Secondary Recommendation: NCV833DR2G (onsemi)

The NCV833DR2G serves as an alternative audio amplifier substitute with identical electrical specifications to the LM833DR2G. This device is suitable for applications where the LM833DR2G is unavailable. Current inventory of 3,884 pieces is available.

Alternative Recommendation: AD8672ARZ Series (Analog Devices Inc.)

The AD8672ARZ, AD8672ARZ-REEL, and AD8672ARZ-REEL7 are general purpose operational amplifiers that meet the core electrical requirements through matching gain bandwidth product and supply voltage specifications. These devices are suitable for applications where general purpose amplification is acceptable. The AD8672ARZ-REEL variant offers the highest inventory availability at 100,400 pieces. The AD8672 series provides superior input bias current (3 nA versus 200 nA) and input offset voltage (20 µV versus 500 µV), resulting in lower noise and drift characteristics.

Package Consideration:

All substitute parts utilize the 8-SOIC package with 0.154" (3.90mm) width, compared to the TL4581PSR package width of 0.209" (5.30mm). This represents a narrower package footprint. PCB layout verification is required to confirm physical compatibility with existing board designs.

Frequently Asked Questions (FAQ)

Q: Can the AD8672ARZ directly replace the TL4581PSR in audio applications?

A: The AD8672ARZ meets the core electrical requirements through matching dual-circuit configuration, gain bandwidth product (10 MHz), and supply voltage range (10V to 36V). However, the AD8672ARZ is classified as a general purpose operational amplifier rather than an audio amplifier. Applications requiring audio-specific performance characteristics should prioritize the LM833DR2G or NCV833DR2G. The AD8672ARZ is suitable for general signal conditioning and amplification where audio-specific optimization is not required.

Q: What is the significance of the different AD8672 packaging variants (ARZ, ARZ-REEL, ARZ-REEL7)?

A: The AD8672ARZ, AD8672ARZ-REEL, and AD8672ARZ-REEL7 represent the same base product (AD8672) differentiated by packaging format. The ARZ variant is supplied in tube packaging. The ARZ-REEL and ARZ-REEL7 variants are supplied in cut tape and Digi-Reel format, suitable for automated assembly processes. All three variants are electrically identical and functionally interchangeable. Selection depends on manufacturing process requirements and inventory management preferences.

Q: Why does the LM833DR2G have a lower output current per channel (29 mA) compared to the TL4581PSR (38 mA)?

A: The LM833DR2G provides 29mA per channel output current, which is lower than the TL4581PSR specification of 38mA per channel. Applications requiring the full 38mA output current per channel must evaluate whether the LM833DR2G output current is sufficient for the intended load impedance. For applications with lower current requirements or higher load impedances, the LM833DR2G is suitable. For applications requiring the full 38mA specification, alternative substitutes or the original TL4581PSR must be sourced if available.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed (AD8672ARZ series and LM833DR2G/NCV833DR2G) are ROHS3 compliant with MSL 1 moisture sensitivity rating, matching the compliance status of the original TL4581PSR.

Q: What is the impact of the narrower 8-SOIC package (3.90mm width) used by substitute parts compared to the TL4581PSR (5.30mm width)?

A: The substitute parts utilize a narrower 8-SOIC package footprint (0.154" or 3.90mm width) compared to the TL4581PSR (0.209" or 5.30mm width). This represents a physical package size reduction. PCB designs using the TL4581PSR footprint must be evaluated for compatibility with the narrower package. In many cases, the narrower package can be accommodated within the existing footprint with adequate clearance. PCB layout verification and potential minor design modifications may be required.

Q: Can the NCV833DR2G be used interchangeably with the LM833DR2G?

A: The NCV833DR2G and LM833DR2G are functionally equivalent audio amplifiers with identical electrical specifications. Both devices provide dual-circuit configuration, matching slew rate (7V/µs), gain bandwidth product (15 MHz), and supply voltage range (10V to 36V). The devices are interchangeable from an electrical standpoint. Selection between the two depends on inventory availability and supplier preference. The LM833DR2G currently maintains higher inventory levels (45,855 pieces versus 3,884 pieces).

Q: What is the operating temperature range difference between the TL4581PSR and substitute parts?

A: The TL4581PSR operates across 0°C to 70°C. The AD8672ARZ series operates across -40°C to 125°C, providing extended low-temperature and high-temperature capability. The LM833DR2G and NCV833DR2G operate across -40°C to 85°C. Applications operating within the original 0°C to 70°C range are fully compatible with all substitute parts. Applications requiring operation below 0°C or above 70°C benefit from the extended temperature range of the substitute devices.

Q: Is the slew rate difference between the TL4581PSR (9V/µs) and substitute parts significant?

A: The TL4581PSR provides 9V/µs slew rate. The AD8672ARZ series provides 4V/µs, while the LM833DR2G and NCV833DR2G provide 7V/µs. Slew rate determines the maximum rate of voltage change at the output. Applications with high-frequency signal content or fast transient requirements should evaluate whether the substitute part slew rate is adequate. For audio applications with bandwidth limited to the 10-15 MHz gain bandwidth product range, the slew rate differences are generally not limiting factors.