LM293AN Equivalent & Substitute Parts

Part Overview

The LM293AN is a dual general-purpose comparator manufactured by onsemi in 8-DIP through-hole packaging. This device features open-collector, open-drain, and rail-to-rail output configuration with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The LM293AN is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.

Substiute Parts

LM293AN

onsemiIn Stock: 2137LM293AN Datasheet

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LM293P

Texas InstrumentsIn Stock: 2587LM293P Datasheet

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AS393P-E1

Diodes IncorporatedIn Stock: 40236AS393P-E1 Datasheet

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LM2903AQTH-13

Diodes IncorporatedIn Stock: 3925LM2903AQTH-13 Datasheet

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LM2903ATH-13

Diodes IncorporatedIn Stock: 6001LM2903ATH-13 Datasheet

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LM2903QM8-13

Diodes IncorporatedIn Stock: 18004LM2903QM8-13 Datasheet

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LT1017IN8#PBF

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

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM293AN are classified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Number of comparator elements: 2
• Supply voltage range: 2V ~ 36V (single) or ±1V ~ 18V (dual)
• Input offset voltage: ≤ 5mV @ specified voltage
• Input bias current: ≤ 0.25µA @ specified voltage
• Output current capability: ≥ 16mA
• Quiescent current: ≤ 2.5mA
• Operating temperature range: minimum -25°C to 85°C

Packaging Considerations:

• Through-hole 8-DIP packages are direct pin-compatible replacements
• Surface-mount alternatives (8-TSSOP, 8-MSOP) require PCB redesign but maintain electrical compatibility

Substitutes are grouped into two categories: direct through-hole replacements and surface-mount alternatives with equivalent electrical performance.

Parameter Comparison

Engineering Selection Recommendations

Through-Hole Direct Replacements (Pin-Compatible):

LM293P (Texas Instruments) is the primary direct replacement for LM293AN. Both devices share identical 8-DIP through-hole packaging, supply voltage range, and operating temperature specifications. LM293P is active in production with ROHS3 compliance, making it suitable for new designs and production continuity.

LT1017IN8#PBF (Analog Devices Inc.) provides enhanced performance characteristics including lower input offset voltage (1mV), significantly lower input bias current (0.015µA), and higher output current capability (65mA). This device operates across an extended supply voltage range (1.1V ~ 40V) and includes specified CMRR and PSRR performance. LT1017IN8#PBF is active and ROHS3 compliant but requires verification of output type compatibility (Pull Up vs. Open-Collector/Open-Drain).

AS393P-E1 (Diodes Incorporated) maintains 8-DIP through-hole packaging with equivalent supply voltage and input bias current specifications. This device is active and ROHS3 compliant with extended operating temperature range (-40°C ~ 85°C).

Surface-Mount Alternatives (PCB Redesign Required):

LM2903ATH-13 and LM2903AQTH-13 (Diodes Incorporated) are 8-TSSOP surface-mount devices with identical electrical specifications to the LM293AN. Both are active, ROHS3 compliant, and feature extended operating temperature range (-40°C ~ 125°C). LM2903AQTH-13 includes AEC-Q100 automotive qualification.

LM2903QM8-13 (Diodes Incorporated) is an 8-MSOP surface-mount package with equivalent electrical performance and AEC-Q100 automotive qualification. This device is active and ROHS3 compliant with extended temperature range.

Frequently Asked Questions (FAQ)

Q: Can LM293P be used as a direct replacement for LM293AN without PCB modifications?

A: Yes. LM293P shares identical 8-DIP through-hole packaging, pin configuration, supply voltage range (2V ~ 36V, ±1V ~ 18V), and operating temperature specifications (-25°C ~ 85°C). Both devices are dual comparators with open-collector output configuration. No PCB modifications are required.

Q: What is the difference between through-hole and surface-mount substitutes?

A: Through-hole substitutes (LM293P, AS393P-E1, LT1017IN8#PBF) use 8-DIP packaging and mount directly into existing PCB holes without redesign. Surface-mount substitutes (LM2903ATH-13, LM2903AQTH-13, LM2903QM8-13) require PCB redesign to accommodate 8-TSSOP or 8-MSOP footprints but offer reduced board space and improved thermal characteristics.

Q: Are all substitutes ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The original LM293AN (obsolete) does not specify RoHS status.

Q: Which substitute offers the best performance improvement?

A: LT1017IN8#PBF provides superior performance with input offset voltage of 1mV (versus 2mV for LM293AN), input bias current of 0.015µA (versus 0.25µA), and output current of 65mA (versus 18mA). This device also specifies CMRR (115dB) and PSRR (110dB) performance. However, output type compatibility must be verified as LT1017IN8#PBF uses Pull Up configuration rather than open-collector/open-drain.

Q: Can surface-mount substitutes be used in existing through-hole designs?

A: No. Surface-mount devices (LM2903 series) require PCB redesign with appropriate surface-mount footprints. Direct socket replacement is not possible without adapter boards or PCB modification.

Q: What is the temperature range difference between through-hole and surface-mount substitutes?

A: Through-hole substitutes maintain the original -25°C to 85°C range (LM293P, AS393P-E1) or extend to -40°C to 85°C (LT1017IN8#PBF). Surface-mount substitutes extend to -40°C to 125°C, providing wider operating temperature coverage for demanding applications.

Q: Are the LM2903 variants (ATH-13, AQTH-13, QM8-13) electrically interchangeable?

A: LM2903ATH-13 and LM2903AQTH-13 are electrically equivalent with identical specifications; AQTH-13 includes AEC-Q100 automotive qualification. LM2903QM8-13 uses a different package (8-MSOP versus 8-TSSOP) but maintains equivalent electrical performance and also includes AEC-Q100 qualification. All three are functionally compatible with LM293AN electrical requirements.