LM393PE4 Equivalent & Substitute Parts

Part Overview

The LM393PE4 is a dual general-purpose comparator manufactured by Texas Instruments, housed in an 8-DIP through-hole package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The LM393PE4 operates across a wide supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) with open-collector, rail-to-rail output configuration, making it suitable for precision voltage comparison applications in industrial and consumer electronics.

Substiute Parts

LM393PE4

Texas InstrumentsIn Stock: 827LM393PE4 Datasheet

Current PartRFQ

LM393P

Texas InstrumentsIn Stock: 161918LM393P Datasheet

MFR RecommendedRFQ

LM393N/NOPB

Texas InstrumentsIn Stock: 89244LM393N/NOPB Datasheet

MFR RecommendedRFQ

LM393PE3

Texas InstrumentsIn Stock: 33664LM393PE3 Datasheet

Parametric EquivalentRFQ

AS393P-E1

Diodes IncorporatedIn Stock: 40236AS393P-E1 Datasheet

UpgradeRFQ

LT1017IN8#PBF

Analog Devices Inc.In Stock: 79280LT1017IN8#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM393PE4 is determined by strict parameter matching across the following critical criteria:

Package Compatibility: All substitute parts must use the 8-DIP (0.300", 7.62mm) through-hole package to ensure direct PCB compatibility without layout modifications.

Electrical Performance: Substitute parts must support the supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply). Input offset voltage, input bias current, and output current specifications must remain within acceptable tolerances for the application.

Output Configuration: The open-collector output type is essential for many legacy designs. Parts with alternative output types (such as pull-up outputs) may function in some applications but represent a design change requiring circuit verification.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and REACH unaffected status to meet regulatory requirements for new production.

The substitute parts are grouped into three categories based on their relationship to the LM393PE4:

MFR Recommended Substitutes: LM393P and LM393N/NOPB are direct Texas Instruments alternatives with identical or superior electrical specifications and active product status.

Parametric Equivalent: LM393PE3 provides identical electrical performance with the same manufacturer, differing only in packaging format (tube vs. tape).

Cross-Manufacturer Upgrade: AS393P-E1 (Diodes Incorporated) and LT1017IN8#PBF (Analog Devices Inc.) offer enhanced performance characteristics while maintaining package compatibility and core functionality.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended): LM393P and LM393N/NOPB are the primary substitutes for the discontinued LM393PE4. Both parts maintain identical electrical specifications, the same 8-DIP package, and active product status from Texas Instruments. LM393P is available in tube packaging with 161,820 units in stock. LM393N/NOPB is also available in tube packaging with 89,188 units in stock and includes MSL 1 moisture sensitivity rating for controlled storage environments.

For Parametric Equivalence: LM393PE3 provides identical electrical performance to the LM393PE4 with the same Texas Instruments manufacturer and ROHS3 compliance. This part differs only in packaging format and remains in active production with 33,561 units available.

For Extended Temperature Range Applications: AS393P-E1 (Diodes Incorporated) extends the operating temperature range to -40°C to 85°C while maintaining the 8-DIP package and open-collector output. This part offers lower quiescent current (1mA vs. 2.5mA) and is suitable for industrial environments requiring wider temperature operation.

For Enhanced Performance Requirements: LT1017IN8#PBF (Analog Devices Inc.) provides superior electrical characteristics including lower input offset voltage (1mV), significantly lower input bias current (0.015µA), and higher output current capability (65mA). However, this part features a pull-up output configuration rather than open-collector, requiring circuit verification before implementation. The extended supply voltage range (1.1V to 40V) and wider operating temperature (-40°C to 85°C) make this suitable for precision applications with demanding specifications.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance for new production and design implementations.

Frequently Asked Questions (FAQ)

Q: Can LM393P be used as a direct replacement for LM393PE4?

A: Yes. LM393P is a direct substitute with identical electrical specifications, the same 8-DIP through-hole package, and active product status from Texas Instruments. The primary difference is packaging format (tube vs. the original part's format). No circuit modifications are required.

Q: What is the difference between LM393P and LM393N/NOPB?

A: Both parts are Texas Instruments LM393 comparators with identical electrical specifications and the 8-DIP package. The difference lies in the part number suffix: LM393P uses the standard designation, while LM393N/NOPB includes the NOPB (No Plumbum/Lead-Free) designation. Both are ROHS3 compliant. LM393N/NOPB includes MSL 1 moisture sensitivity rating.

Q: Why would I choose AS393P-E1 over the Texas Instruments alternatives?

A: AS393P-E1 (Diodes Incorporated) is selected when extended temperature range operation is required (-40°C to 85°C vs. 0°C to 70°C for the LM393PE4). It also offers lower quiescent current consumption (1mA vs. 2.5mA), beneficial for battery-powered or low-power applications. The open-collector output maintains compatibility with existing designs.

Q: Is LT1017IN8#PBF compatible with LM393PE4 designs?

A: LT1017IN8#PBF shares the 8-DIP package and dual-comparator configuration but uses a pull-up output instead of open-collector. While the 8-DIP package allows physical installation, the different output type requires circuit analysis and potential modifications to pull-up resistor networks and output signal conditioning. This part is suitable for new designs requiring enhanced performance specifications rather than direct legacy replacement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (LM393P, LM393N/NOPB, LM393PE3, AS393P-E1, and LT1017IN8#PBF) are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for production and distribution in regulated markets.

Q: What is the inventory status for these substitute parts?

A: LM393P has 161,820 units in stock, LM393N/NOPB has 89,188 units, LM393PE3 has 33,561 units, AS393P-E1 has 40,200 units, and LT1017IN8#PBF has 79,262 units available as new original stock. All parts are in active production.

Q: Can I use these substitutes interchangeably in my existing PCB design?

A: LM393P, LM393N/NOPB, and LM393PE3 are direct interchangeable substitutes with identical electrical specifications and the same 8-DIP package. AS393P-E1 is mechanically compatible but offers extended temperature range. LT1017IN8#PBF requires circuit verification due to its pull-up output configuration. Always verify output type compatibility with your application's signal conditioning requirements.