LM393PS-P Equivalent & Substitute Parts

Part Overview

The LM393PS-P is a general-purpose comparator manufactured by Texas Instruments, featuring dual open-collector, rail-to-rail output configuration in an 8-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production status. Identification of equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this comparator architecture.

Substiute Parts

LM393PS-P

Texas InstrumentsIn Stock: 1055LM393PS-P Datasheet

Current PartRFQ

LM393DR

Rohm SemiconductorIn Stock: 330302LM393DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM393PS-P is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Dual comparator configuration (2 elements)
• Open-collector, rail-to-rail output topology
• Supply voltage range compatibility: minimum 2V single supply or ±1V dual supply
• Input offset voltage specification
• Input bias current specification
• Output current capability
• Surface mount 8-SOIC package format
• Operating temperature range: 0°C ~ 70°C minimum
• RoHS3 compliance

The LM393DR, manufactured by Rohm Semiconductor, meets all critical electrical parameters within the allowed specification envelope. Both devices share the same base product number (LM393) and identical functional architecture. The LM393DR operates across an extended supply voltage range (2V ~ 36V, ±1V ~ 18V) and maintains equivalent input bias current specifications. Package dimensions differ slightly (0.154" vs. 0.209" width), but both conform to 8-SOIC surface mount standards suitable for PCB integration.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: LM393DR

The LM393DR is the direct functional equivalent for the LM393PS-P. Both devices are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols. The LM393DR provides extended supply voltage specifications (2V ~ 36V single supply, ±1V ~ 18V dual supply) compared to the LM393PS-P (2V ~ 30V, ±1V ~ 15V), offering greater operational flexibility without compromising core performance parameters.

Compliance Considerations:

Both the main part and substitute maintain ROHS3 compliance. The LM393DR carries REACH Unaffected status and EAR99 export classification, confirming regulatory alignment for international applications. The LM393DR is designated "Not For New Designs," indicating manufacturer discontinuation; however, it remains functionally suitable for existing design maintenance and production continuation.

Package and Mounting:

Both devices utilize 8-SOIC surface mount packaging. While physical dimensions differ slightly (0.209" vs. 0.154" width), both conform to standard 8-SOIC footprint specifications and are compatible with existing PCB layouts designed for this package category.

Frequently Asked Questions (FAQ)

Q: Can the LM393DR directly replace the LM393PS-P in existing designs?

A: Yes. The LM393DR meets all critical electrical specifications for the LM393PS-P, including dual comparator configuration, open-collector rail-to-rail output, input bias current, output current capability, and operating temperature range. Both devices share the same base product number (LM393) and functional architecture. PCB footprints are compatible for 8-SOIC surface mount applications.

Q: What are the key differences between these parts?

A: The LM393DR supports an extended supply voltage range (2V ~ 36V vs. 2V ~ 30V single supply; ±1V ~ 18V vs. ±1V ~ 15V dual supply). The LM393DR exhibits slightly higher input offset voltage (7mV @ 5V vs. 5mV @ 30V) and higher quiescent current (2.5mA vs. 1mA). Physical package dimensions differ marginally (0.154" vs. 0.209" width), though both are standard 8-SOIC format.

Q: Are there compliance or regulatory concerns with substitution?

A: No. Both the LM393PS-P and LM393DR are ROHS3 compliant with MSL Level 1 (Unlimited) ratings. The LM393DR carries REACH Unaffected status and EAR99 export classification, confirming regulatory compatibility for standard industrial and commercial applications.

Q: Why is the LM393PS-P listed as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued production of this part number. The LM393DR, while also discontinued (Not For New Designs), remains available from inventory and serves as the functional equivalent for design continuity and production support.

Q: Will the higher quiescent current of the LM393DR affect circuit performance?

A: The LM393DR quiescent current specification (2.5mA maximum) is higher than the LM393PS-P (1mA maximum). For most general-purpose comparator applications, this difference is negligible. Applications with strict power budget constraints should evaluate the impact on total system current consumption.

Q: Are the package dimensions interchangeable?

A: Both devices use 8-SOIC surface mount packaging with compatible PCB footprints. Physical dimensions differ slightly (0.154" vs. 0.209" width), but this variation falls within standard 8-SOIC tolerance specifications and does not affect PCB layout compatibility or reflow soldering processes.