INA137PA Equivalent & Substitute Parts

Part Overview

The INA137PA is an audio differential line receiver integrated circuit manufactured by Texas Instruments, classified as a linear amplifier component. This device functions as a receiver IC for audio applications and is housed in an 8-PDIP (0.300", 7.62mm) through-hole package.

The INA137PA currently holds an obsolete product status. Due to this obsolescence, locating new original stock of this through-hole variant has become increasingly difficult. Identifying functionally equivalent substitute parts ensures design continuity and maintains access to compatible receiver solutions for audio differential line applications.

Substiute Parts

INA137PA

Texas InstrumentsIn Stock: 3996INA137PA Datasheet

Current PartRFQ

INA137UA/2K5

Texas InstrumentsIn Stock: 17873INA137UA/2K5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INA137PA is determined by the following critical parameters:

Functional Equivalence: Both the main part and substitute must share the same base product number (INA137) and serve identical audio differential line receiver applications.

Electrical Compatibility: The INA137 series maintains consistent electrical characteristics across package variants, ensuring functional interchangeability at the circuit level.

Compliance Alignment: Both parts must maintain ROHS3 compliance and REACH unaffected status to satisfy regulatory requirements.

Key Substitution Criteria:

• Base product number: INA137
• Functional category: Audio differential line receiver
• Manufacturer: Texas Instruments
• RoHS and REACH compliance status

The primary substitute, INA137UA/2K5, shares the same functional design and electrical specifications as the INA137PA. The substitution differs in physical packaging format (surface mount versus through-hole) and product status (active versus obsolete).

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole Designs: The INA137PA remains the specified component when PCB layouts mandate through-hole mounting technology. However, given obsolete status, long-term availability cannot be assured.

For Active Product Status: The INA137UA/2K5 provides an active, currently manufactured alternative from Texas Instruments. This substitute ensures ongoing supply chain access and manufacturing support.

For Surface Mount Designs: The INA137UA/2K5 is the appropriate selection when PCB designs incorporate surface mount assembly processes. This variant offers superior availability and aligns with modern manufacturing standards.

Compliance Considerations: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent applications.

Moisture Sensitivity: The INA137PA carries MSL 1 (unlimited), while the INA137UA/2K5 carries MSL 3 (168 hours). Storage and handling procedures must account for this difference when transitioning between variants.

Frequently Asked Questions (FAQ)

Q: Can the INA137UA/2K5 directly replace the INA137PA in existing designs?

A: Electrical and functional compatibility exists between these parts. However, the INA137UA/2K5 uses surface mount packaging (8-SOIC) while the INA137PA uses through-hole packaging (8-DIP). PCB layout modifications are required to accommodate the different package format and pin configuration.

Q: What is the primary reason for substituting the INA137PA?

A: The INA137PA holds obsolete product status, limiting availability of new original stock. The INA137UA/2K5 maintains active status and ensures reliable supply chain access for audio differential line receiver applications.

Q: Are there electrical performance differences between these parts?

A: Both parts share the same base product number (INA137) and serve identical audio receiver functions. Electrical specifications remain consistent across the INA137 series.

Q: What packaging considerations apply when switching from INA137PA to INA137UA/2K5?

A: The INA137PA is a through-hole component (8-DIP, 0.300" width), while the INA137UA/2K5 is a surface mount component (8-SOIC, 0.154" width). PCB redesign is necessary to accommodate the different mounting technology and footprint.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the INA137PA and INA137UA/2K5 are ROHS3 compliant and REACH unaffected, satisfying equivalent regulatory requirements.

Q: What is the difference in moisture sensitivity between these parts?

A: The INA137PA carries MSL 1 (unlimited moisture sensitivity), while the INA137UA/2K5 carries MSL 3 (168 hours). The INA137UA/2K5 requires controlled storage conditions and has a limited shelf life after package opening.