LM393DRE4 Equivalent & Substitute Parts

Part Overview

The LM393DRE4 is a dual general-purpose comparator IC manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device features open-collector, rail-to-rail output configuration with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The LM393DRE4 is currently classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing production and design continuity. Alternative parts maintain functional compatibility while offering improved availability and active product status.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393DRE4
Manufacturer	Texas Instruments
Category	Linear
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	5mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM393DRE4 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Number of Elements: 2
Output Type: Open-Collector, Rail-to-Rail
Voltage - Supply, Single/Dual (±): 2V ~ 36V, ±1V ~ 18V
Current - Input Bias (Max): 0.25µA @ 5V
Current - Quiescent (Max): 2.5mA
Operating Temperature: 0°C ~ 70°C (minimum requirement)
RoHS Status: ROHS3 Compliant

Substitute parts are categorized as follows:

MFR Recommended (Texas Instruments Active Alternatives): LM393M/NOPB and LM393MX/NOPB maintain identical electrical specifications with active product status and improved availability.

Parametric Equivalents: LM393DRG3, LM393DRG4, and LM393DR provide functional equivalence with matching core parameters, though LM393DRG4 and LM393DR carry obsolete or not-for-new-designs status.

Direct Equivalents (STMicroelectronics): LM393D, LM393DT, and LM393WDT are active cross-manufacturer alternatives with identical electrical performance and package specifications.

Upgrade Options (Diodes Incorporated): AS393MTR-E1 and AS393MTR-G1 offer extended operating temperature range (-40°C to 85°C) and lower quiescent current (1mA), representing performance enhancements within the same package footprint.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Packaging	Voltage - Input Offset (Max)	Current - Output (Typ)	Current - Quiescent (Max)	Propagation Delay (Max)	Operating Temperature	Inventory (Pcs)
LM393DRE4	Texas Instruments	Obsolete	Tape & Reel (TR)	5mV @ 30V	20mA	2.5mA	—	0°C ~ 70°C	3,472
LM393M/NOPB	Texas Instruments	Active	Tube	5mV @ 30V	16mA @ 5V	2.5mA	700ns	0°C ~ 70°C	5,381
LM393MX/NOPB	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	5mV @ 30V	16mA @ 5V	2.5mA	700ns	0°C ~ 70°C	82,700
LM393DR	Rohm Semiconductor	Not For New Designs	Cut Tape (CT) & Digi-Reel®	7mV @ 5V	6mA @ 5V	2.5mA	—	0°C ~ 70°C	330,200
LM393DRG3	Texas Instruments	Active	Tape & Reel (TR)	5mV @ 30V	20mA	2.5mA	—	0°C ~ 70°C	2,229
LM393DRG4	Texas Instruments	Obsolete	Cut Tape (CT) & Digi-Reel®	5mV @ 30V	20mA	2.5mA	—	0°C ~ 70°C	20,200
LM393D	STMicroelectronics	Active	Tube	5mV @ 30V	18mA @ 5V	2.5mA	—	0°C ~ 70°C	44,575
LM393DT	STMicroelectronics	Active	Cut Tape (CT) & Digi-Reel®	5mV @ 30V	18mA @ 5V	2.5mA	—	0°C ~ 70°C	505,100
LM393WDT	STMicroelectronics	Active	Tape & Reel (TR)	5mV @ 30V	16mA @ 5V	2.5mA	—	0°C ~ 70°C	2,508
AS393MTR-E1	Diodes Incorporated	Active	Tape & Reel (TR)	5mV @ 5V	16mA @ 5V	1mA	—	-40°C ~ 85°C	354,160
AS393MTR-G1	Diodes Incorporated	Active	Cut Tape (CT) & Digi-Reel®	5mV @ 5V	16mA @ 5V	1mA	—	-40°C ~ 85°C	300,400

Engineering Selection Recommendations

For Direct Replacement (Active Status Priority): LM393MX/NOPB and LM393DT are the primary recommendations. Both maintain identical electrical specifications to the LM393DRE4, carry active product status, and offer superior inventory availability (82,700 and 505,100 units respectively). LM393MX/NOPB is supplied in Cut Tape & Digi-Reel® packaging, while LM393DT is available in the same format from STMicroelectronics.

For Tape & Reel Packaging Requirement: LM393DRG3 (Texas Instruments, Active) and LM393WDT (STMicroelectronics, Active) both provide Tape & Reel packaging with identical electrical performance. LM393DRG3 maintains the original output current specification of 20mA, while LM393WDT delivers 16mA.

For Extended Temperature Range Applications: AS393MTR-E1 and AS393MTR-G1 (Diodes Incorporated) extend the operating temperature range to -40°C to 85°C and reduce quiescent current to 1mA. These parts are suitable for applications requiring enhanced thermal performance while maintaining all other electrical parameters within specification.

Parts to Avoid: LM393DR (Rohm Semiconductor, Not For New Designs) and LM393DRG4 (Texas Instruments, Obsolete) should not be selected for new designs despite inventory availability. LM393M/NOPB, while active, has limited inventory (5,381 units) compared to alternatives.

All recommended substitutes maintain ROHS3 compliance and MSL ratings compatible with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can LM393MX/NOPB directly replace LM393DRE4 in existing designs? A: Yes. LM393MX/NOPB maintains identical electrical specifications including supply voltage range (2V ~ 36V, ±1V ~ 18V), input offset voltage (5mV @ 30V), input bias current (0.25µA @ 5V), quiescent current (2.5mA), and operating temperature range (0°C ~ 70°C). The 8-SOIC package footprint is identical. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel), which does not affect circuit performance.

Q: What is the difference between LM393DT and LM393WDT? A: Both are STMicroelectronics LM393 variants in 8-SOIC packages with identical electrical specifications. LM393DT is supplied in Cut Tape & Digi-Reel® packaging with 505,100 units in stock. LM393WDT is supplied in Tape & Reel packaging with 2,508 units in stock. Output current is 18mA for both. Selection depends on packaging requirements and inventory availability.

Q: Why do AS393MTR-E1 and AS393MTR-G1 have lower quiescent current? A: AS393MTR-E1 and AS393MTR-G1 are manufactured by Diodes Incorporated and specify 1mA maximum quiescent current compared to 2.5mA for Texas Instruments and STMicroelectronics variants. This represents a design optimization by the manufacturer and does not affect functional compatibility. These parts also extend the operating temperature range to -40°C to 85°C.

Q: Is the 8-SOIC package identical across all substitute parts? A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package with surface-mount configuration. PCB footprints are identical, and parts are interchangeable from a mechanical standpoint.

Q: Can I use LM393DR as a substitute? A: LM393DR meets the electrical parameter requirements but carries a "Not For New Designs" status from Rohm Semiconductor. While functionally compatible, it is not recommended for new production designs. Active alternatives with superior product status are available.

Q: What is the significance of the propagation delay specification in LM393M/NOPB and LM393MX/NOPB? A: LM393M/NOPB and LM393MX/NOPB specify a maximum propagation delay of 700ns, whereas the original LM393DRE4 does not provide this specification. This additional specification detail does not indicate a functional difference; it represents more complete datasheet documentation. The 700ns value is typical for general-purpose comparators in this family.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed maintain ROHS3 compliance, matching the original LM393DRE4 specification. Moisture sensitivity levels range from MSL 1 (Unlimited) to MSL 3 (168 Hours), which are standard for surface-mount ICs and compatible with typical manufacturing processes.

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