LM393DRG4 Equivalent & Substitute Parts

Part Overview

The LM393DRG4 is a general-purpose dual comparator IC manufactured by Texas Instruments in 8-SOIC surface-mount packaging. 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 LM393DRG4 is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393DRG4
Manufacturer	Texas Instruments
Product Category	Linear Comparator
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Supply Voltage (Single/Dual)	2V ~ 36V, ±1V ~ 18V
Input Offset Voltage (Max)	5mV @ 30V
Input Bias Current (Max)	0.25µA @ 5V
Output Current (Typ)	20mA
Quiescent Current (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM393DRG4 is determined by the following critical parameters:

Package compatibility: 8-SOIC form factor with identical pinout
Output configuration: Open-collector, rail-to-rail topology
Supply voltage range: 2V ~ 36V (single) or ±1V ~ ±18V (dual)
Input offset voltage: Maximum 5mV @ 30V
Input bias current: Maximum 0.25µA @ 5V
Output current capability: Minimum 16mA typical
Quiescent current: Maximum 2.5mA
Operating temperature: Minimum 0°C ~ 70°C range
RoHS3 compliance and MSL rating

Substitute parts are categorized as follows:

MFR Recommended: Active-status alternatives from the original manufacturer (Texas Instruments) with identical electrical specifications and improved availability.

Parametric Equivalent: Parts meeting all critical electrical parameters from alternative manufacturers, with minor variations in output current or propagation delay characteristics.

Direct Equivalent: Cross-compatible parts from established semiconductor manufacturers with verified pin-for-pin compatibility and matching electrical performance.

Upgrade: Enhanced-specification alternatives offering extended temperature range, improved quiescent current, or superior availability while maintaining functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range	Availability
LM393DRG4	Texas Instruments	Obsolete	8-SOIC CT	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	20,200 pcs
LM393M/NOPB	Texas Instruments	Active	8-SOIC Tube	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	5,381 pcs
LM393MX/NOPB	Texas Instruments	Active	8-SOIC CT	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	82,700 pcs
LM393DR	Rohm Semiconductor	Not For New Designs	8-SOIC CT	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	6mA @ 5V	2.5mA	0°C ~ 70°C	330,200 pcs
LM393DRE4	Texas Instruments	Obsolete	8-SOIC TR	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	3,472 pcs
LM393DRG3	Texas Instruments	Active	8-SOIC TR	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	2,229 pcs
LM393D	STMicroelectronics	Active	8-SOIC Tube	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	0°C ~ 70°C	44,575 pcs
LM393WDT	STMicroelectronics	Active	8-SOIC TR	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	2,508 pcs
AS393MTR-E1	Diodes Incorporated	Active	8-SOIC TR	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	354,160 pcs
AS393MTR-G1	Diodes Incorporated	Active	8-SOIC CT	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	300,400 pcs
LM193DT	STMicroelectronics	Active	8-SOIC CT	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-55°C ~ 125°C	78,081 pcs

Engineering Selection Recommendations

For Active Production (Recommended Priority):

LM393MX/NOPB from Texas Instruments is the primary recommendation. This part maintains identical electrical specifications to the obsolete LM393DRG4, carries active product status, offers the highest inventory availability (82,700 pcs), and is supplied in cut-tape packaging suitable for automated assembly. RoHS3 compliance and MSL-1 rating match the original specification.

Secondary Active Alternatives:

LM393M/NOPB provides equivalent electrical performance with active status but is supplied in tube packaging, requiring manual handling for assembly operations. LM393DRG3 from Texas Instruments offers identical specifications with active status but lower inventory levels and tape-and-reel packaging.

Cross-Manufacturer Alternatives:

LM393D and LM393WDT from STMicroelectronics provide direct electrical equivalence with active product status. LM393D is available in tube packaging (44,575 pcs), while LM393WDT is supplied in tape-and-reel format (2,508 pcs). Both maintain the 0°C to 70°C operating range and RoHS3 compliance.

Extended Temperature Range Option:

LM193DT from STMicroelectronics extends the operating temperature range to -55°C to 125°C while maintaining all other electrical parameters. This part is suitable for applications requiring enhanced thermal performance and is available in cut-tape packaging (78,081 pcs).

Enhanced Quiescent Current Option:

AS393MTR-E1 and AS393MTR-G1 from Diodes Incorporated reduce quiescent current to 1mA (versus 2.5mA) and extend operating temperature to -40°C to 85°C. These parts feature MSL-3 rating and are available in high quantities (354,160 and 300,400 pcs respectively). The AS393MTR-G1 cut-tape variant is preferred for automated assembly.

Not Recommended for New Designs:

LM393DR from Rohm Semiconductor carries "Not For New Designs" status and exhibits reduced output current (6mA typical) and higher input offset voltage (7mV @ 5V), making it unsuitable for new production despite high inventory availability.

Frequently Asked Questions (FAQ)

Q: Can LM393MX/NOPB directly replace LM393DRG4 in existing designs?

A: Yes. LM393MX/NOPB maintains identical electrical specifications, package footprint (8-SOIC), pinout, and operating temperature range. The primary difference is product status (active versus obsolete) and packaging format (cut-tape versus cut-tape). No circuit modifications are required.

Q: What is the difference between LM393M/NOPB and LM393MX/NOPB?

A: Both parts are electrically identical with active product status. The distinction is packaging: LM393M/NOPB is supplied in tube format for manual handling, while LM393MX/NOPB is supplied in cut-tape format optimized for automated pick-and-place assembly. Select based on assembly process requirements.

Q: Why does LM393DR show higher inventory but "Not For New Designs" status?

A: LM393DR is a legacy part from Rohm Semiconductor maintained for existing customer support. The "Not For New Designs" designation indicates the manufacturer recommends against incorporating this part into new product development. Additionally, output current is reduced to 6mA typical, which may not meet all application requirements.

Q: Can AS393MTR-E1 or AS393MTR-G1 be used as drop-in replacements?

A: Yes, with design considerations. These Diodes Incorporated parts are pin-for-pin compatible and meet all critical electrical parameters. Advantages include reduced quiescent current (1mA versus 2.5mA) and extended temperature range (-40°C to 85°C). The MSL-3 moisture sensitivity rating requires controlled storage conditions compared to MSL-1 for other alternatives.

Q: Which substitute part offers the best availability?

A: AS393MTR-E1 from Diodes Incorporated provides the highest inventory (354,160 pcs), followed by AS393MTR-G1 (300,400 pcs) and LM393MX/NOPB from Texas Instruments (82,700 pcs). Availability should be verified with your component supplier for current stock levels.

Q: Is LM193DT suitable for applications requiring extended temperature operation?

A: Yes. LM193DT extends the operating range to -55°C to 125°C while maintaining all other electrical specifications of the LM393DRG4. This part is recommended for applications requiring enhanced thermal performance or operation in extreme temperature environments.

Q: What packaging formats are available for automated assembly?

A: Cut-tape (CT) and Digi-Reel packaging formats are optimized for automated pick-and-place assembly. Recommended parts in this format include LM393MX/NOPB, LM393DR, AS393MTR-G1, and LM193DT. Tube and tape-and-reel formats require alternative handling procedures.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification, matching the original LM393DRG4 specification. This ensures compatibility with environmental and regulatory requirements for lead-free manufacturing.

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