LM393FJ-E2 Equivalent & Substitute Parts

Part Overview

The LM393FJ-E2 is a general-purpose dual comparator manufactured by Rohm Semiconductor in an 8-SOP surface-mount package. This device features open-collector output configuration and operates across a wide supply voltage range of 3V to 32V (single supply) or ±1.5V to ±16V (dual supply). The LM393FJ-E2 is currently in active product status with 3,100 units in stock.

Substitute parts are necessary when the primary device becomes unavailable, when alternative packaging formats are required for manufacturing compatibility, or when design specifications allow for functionally equivalent alternatives from different manufacturers. The LM393 family of comparators shares a common base product number across multiple manufacturers, enabling direct functional substitution within defined electrical and mechanical parameters.

Substiute Parts

LM393FJ-E2

Rohm SemiconductorIn Stock: 3150LM393FJ-E2 Datasheet

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LMV393IDDUR

Texas InstrumentsIn Stock: 15338LMV393IDDUR Datasheet

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LMV393MM/NOPB

Texas InstrumentsIn Stock: 4483LMV393MM/NOPB Datasheet

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LMV393QDRQ1

Texas InstrumentsIn Stock: 17666LMV393QDRQ1 Datasheet

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LMV393S-13

Diodes IncorporatedIn Stock: 5357LMV393S-13 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM393FJ-E2 is determined by the following critical parameters:

Functional Equivalence Criteria:

• Dual comparator configuration (2 elements)
• Open-collector output topology
• General-purpose application classification
• Operating temperature range compatibility (-40°C minimum)
• Surface-mount technology

Electrical Compatibility Criteria:

• Supply voltage range must encompass or overlap with 3V to 32V single-supply operation
• Input offset voltage and input bias current specifications must be compatible with circuit design tolerances
• Output current capability must meet or exceed application requirements
• Quiescent current specifications must be acceptable for power budget constraints

Mechanical Compatibility Criteria:

• Package format must be surface-mount (8-pin configuration)
• Pin pitch and body dimensions must be compatible with PCB layout
• Packaging format (Tape & Reel, Cut Tape, or Digi-Reel) affects procurement and assembly processes

Compliance and Certification:

• RoHS3 compliance required for environmental standards
• Moisture sensitivity level affects storage and handling requirements
• Product status (Active or Last Time Buy) impacts long-term availability

Four substitute parts meet these criteria: LMV393IDDUR, LMV393MM/NOPB, LMV393QDRQ1, and LMV393S-13. Each maintains the dual open-collector comparator architecture while offering variations in electrical performance, package dimensions, and manufacturer certifications.

Parameter Comparison

Engineering Selection Recommendations

LMV393QDRQ1 (Texas Instruments) - Preferred Substitute

The LMV393QDRQ1 offers the closest mechanical compatibility with the LM393FJ-E2, featuring an identical 8-SOIC package footprint (0.154", 3.90mm width). This eliminates PCB layout modifications. The device maintains active product status with the highest inventory availability (17,600 units). Extended operating temperature range (-40°C to 125°C) provides additional thermal margin. AEC-Q100 automotive qualification and lower input bias current (0.025µA) deliver enhanced performance characteristics. Supply voltage range limitation (2.7V to 5.5V) requires circuit verification for applications exceeding 5.5V single supply.

LMV393S-13 (Diodes Incorporated) - Alternative with Extended Temperature

The LMV393S-13 maintains identical 8-SOIC package dimensions and Tape & Reel packaging format matching the original device. Extended operating temperature range (-40°C to 125°C) supports high-temperature applications. Faster propagation delay (450ns) improves switching performance. Moisture sensitivity level 3 (168 hours) requires controlled storage conditions. Supply voltage range (2.7V to 5.5V) is identical to other LMV393 variants.

LMV393MM/NOPB (Texas Instruments) - Active Status Alternative

The LMV393MM/NOPB maintains active product status with good inventory levels (4,415 units). Tape & Reel packaging matches procurement format. Smaller package footprint (8-TSSOP/MSOP, 0.118", 3.00mm width) requires PCB layout redesign. Enhanced output type specification (CMOS, Open-Collector, TTL) provides additional interface flexibility. Supply voltage range (2.7V to 5.5V) is standard for LMV393 family.

LMV393IDDUR (Texas Instruments) - Last Time Buy Status

The LMV393IDDUR carries Last Time Buy product status, indicating discontinued manufacturing. Highest inventory availability (15,310 units) provides near-term supply. Smallest package footprint (8-VFSOP, 0.091", 2.30mm width) requires significant PCB redesign. Cut Tape & Digi-Reel packaging format differs from standard Tape & Reel. Supply voltage range (2.7V to 5.5V) is standard for LMV393 family. Not recommended for new designs due to product status.

Frequently Asked Questions (FAQ)

Q: Can the LMV393QDRQ1 directly replace the LM393FJ-E2 without PCB modifications?

A: Yes. Both devices use identical 8-SOIC package dimensions (0.154", 3.90mm width) with matching pin pitch and body outline. No PCB layout changes are required for mechanical compatibility. Electrical compatibility must be verified for applications requiring supply voltages above 5.5V, as the LMV393QDRQ1 maximum single supply is 5.5V compared to the LM393FJ-E2 maximum of 32V.

Q: What is the primary limitation when substituting with LMV393 variants?

A: The LMV393 family operates at reduced maximum supply voltage (2.7V to 5.5V single supply) compared to the LM393FJ-E2 (3V to 32V). Applications requiring supply voltages above 5.5V cannot use LMV393 substitutes. Dual supply operation (±1.5V to ±16V for LM393FJ-E2 versus ±1.35V to ±2.75V for LMV393) is similarly restricted.

Q: Which substitute offers the best long-term availability?

A: The LMV393QDRQ1 and LMV393S-13 both maintain active product status. The LMV393QDRQ1 has the highest inventory (17,600 units) and active manufacturing status. The LMV393MM/NOPB also maintains active status with 4,415 units in stock. The LMV393IDDUR carries Last Time Buy status and should not be selected for new designs despite high current inventory.

Q: Are there package format differences that affect assembly?

A: Yes. The LM393FJ-E2 uses Tape & Reel (TR) packaging. The LMV393QDRQ1 and LMV393S-13 also use Tape & Reel format, maintaining compatibility with standard pick-and-place assembly equipment. The LMV393IDDUR uses Cut Tape & Digi-Reel format, and the LMV393MM/NOPB uses Tape & Reel but with a different package type (8-TSSOP/MSOP). Packaging format changes may require assembly process adjustments.

Q: What is the significance of moisture sensitivity level differences?

A: The LM393FJ-E2 and all LMV393 variants except LMV393S-13 have MSL 1 (Unlimited), allowing indefinite storage without baking. The LMV393S-13 has MSL 3 (168 hours), requiring baking at 125°C for 24 hours if exposed to humidity above 30% for more than 168 hours. This affects storage, handling, and shelf-life management in manufacturing environments.

Q: Can the LMV393MM/NOPB be used as a direct substitute despite different package dimensions?

A: The LMV393MM/NOPB uses 8-TSSOP/MSOP package (0.118", 3.00mm width) versus the LM393FJ-E2 8-SOIC (0.154", 3.90mm width). While electrically compatible, the different package footprint requires PCB layout redesign. Pin pitch remains standard, but body width and length differ, necessitating new land pattern design and board layout modifications.

Q: How do output current specifications affect substitution decisions?

A: The LM393FJ-E2 provides 16mA typical output current at 5V. All LMV393 substitutes provide 84mA typical output current at 5V. Higher output current capability in substitutes is generally beneficial, allowing direct connection to additional logic loads without additional buffering. Applications designed for 16mA output current will operate correctly with 84mA-capable devices.

Q: What is the impact of extended operating temperature range in LMV393QDRQ1 and LMV393S-13?

A: The LM393FJ-E2 operates from -40°C to 85°C. The LMV393QDRQ1 and LMV393S-13 extend the upper limit to 125°C. This extended range supports high-temperature applications and provides additional thermal margin in standard temperature environments. Applications limited to -40°C to 85°C operation experience no disadvantage from the extended range.

Q: Are there compliance or certification differences between substitutes?

A: All substitutes maintain ROHS3 compliance and REACH Unaffected status matching the LM393FJ-E2. The LMV393QDRQ1 includes AEC-Q100 automotive qualification, providing additional reliability assurance for automotive and harsh-environment applications. This certification is not present in other substitutes but is not required for general industrial applications.