LM393ADG4 Equivalent & Substitute Parts

Part Overview

The LM393ADG4 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 and operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply). The LM393ADG4 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional equivalence through matching electrical specifications and package compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393ADG4
Manufacturer	Texas Instruments
Category	Linear
Description	IC COMPARATOR 2 DIFF 8SOIC
Product Status	Obsolete
Type	General Purpose
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	2mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM393ADG4 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Dual comparator configuration (2 elements)
Open-collector output type
Supply voltage range: 2V ~ 36V (single) or ±1V ~ ±18V (dual)
Input offset voltage maximum: 2mV to 5mV @ specified voltage
Input bias current maximum: 0.1µA to 0.4µA @ 5V
Output current capability: 16mA to 20mA
Quiescent current maximum: 1mA to 2.5mA

Package and Mechanical Requirements:

8-pin SOIC or 8-pin SOP surface-mount package
Package width: 0.154" to 0.173" (3.90mm to 4.40mm)
Surface-mount technology compatibility

Compliance and Environmental Requirements:

ROHS3 compliance
MSL rating of 1 to 3
Operating temperature range: 0°C ~ 70°C (standard) or -40°C ~ 85°C (extended) or -40°C ~ 105°C (high-temperature variants)

Substitute parts are grouped by manufacturer and product status (active vs. obsolete). Active parts are preferred for new designs due to ongoing availability and support.

Parameter Comparison

Part Number	Manufacturer	Status	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range	Package
LM393ADG4	Texas Instruments	Obsolete	2V~36V, ±1V~18V	2mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	8-SOIC
LM393AD	STMicroelectronics	Obsolete	2V~36V, ±1V~18V	2mV @ 30V	0.1µA @ 5V	18mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC
LM393ADR	UMW	Active	2V~36V, ±1V~18V	5mV	250nA	16mA	1mA	0°C ~ 70°C	8-SOIC
LM393M/NOPB	Texas Instruments	Active	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC
LM393MX/NOPB	Texas Instruments	Active	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC
AS393AMTR-E1	Diodes Incorporated	Active	2V~36V, ±1V~18V	3mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC
AS393AMTR-G1	Diodes Incorporated	Active	2V~36V, ±1V~18V	3mV @ 1.4V	0.4µA @ 5V	16mA	1mA	-40°C ~ 85°C	8-SOIC
AS393MTR-E1	Diodes Incorporated	Active	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC
AS393MTR-G1	Diodes Incorporated	Active	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC
BA10393F-E2	Rohm Semiconductor	Active	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOP
BA2903SF-E2	Rohm Semiconductor	Active	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 105°C	8-SOP

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Active Transition):

The LM393M/NOPB and LM393MX/NOPB from Texas Instruments are the primary recommended substitutes. Both maintain identical electrical specifications to the LM393ADG4 while offering active product status and continued manufacturer support. These parts are available in standard 8-SOIC packaging and are ROHS3 compliant with MSL-1 rating.

For Extended Temperature Range Applications:

The AS393AMTR-E1, AS393AMTR-G1, AS393MTR-E1, and AS393MTR-G1 from Diodes Incorporated provide extended operating temperature range (-40°C ~ 85°C) compared to the standard 0°C ~ 70°C specification. These parts maintain electrical compatibility and are suitable for industrial and automotive environments requiring broader temperature performance.

For High-Temperature Applications:

The BA2903SF-E2 from Rohm Semiconductor extends the operating temperature range to -40°C ~ 105°C, accommodating high-temperature industrial applications. This part is available in 8-SOP packaging, which is mechanically compatible with 8-SOIC footprints on standard PCB layouts.

For Cost-Optimized Designs:

The LM393ADR from UMW offers active product status with reduced quiescent current (1mA vs. 2.5mA) and lower input bias current (250nA), providing improved power efficiency in battery-powered or low-power applications while maintaining full electrical compatibility.

All recommended substitutes are ROHS3 compliant and carry MSL ratings suitable for standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can I use LM393M/NOPB as a direct replacement for LM393ADG4?

A: Yes. The LM393M/NOPB maintains identical electrical specifications including supply voltage range (2V ~ 36V, ±1V ~ 18V), input offset voltage (5mV @ 30V), input bias current (0.25µA @ 5V), and output current capability (16mA @ 5V). Both use 8-SOIC packaging and are ROHS3 compliant. The primary difference is product status: LM393ADG4 is obsolete while LM393M/NOPB is active.

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

A: Both parts are electrically identical and use the same 8-SOIC package. The primary difference is packaging format: LM393M/NOPB is supplied in Tube packaging, while LM393MX/NOPB is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on your procurement and assembly requirements.

Q: Can I substitute AS393 series parts for the LM393ADG4?

A: Yes, with considerations. The AS393AMTR-E1, AS393AMTR-G1, AS393MTR-E1, and AS393MTR-G1 from Diodes Incorporated are electrically compatible and use the same 8-SOIC package. However, these parts offer extended operating temperature range (-40°C ~ 85°C) compared to the standard 0°C ~ 70°C. They are suitable for applications requiring broader temperature performance and are available in higher inventory quantities.

Q: Are 8-SOP and 8-SOIC packages interchangeable?

A: 8-SOP and 8-SOIC packages are mechanically similar but have different pitch and body dimensions. BA10393F-E2 and BA2903SF-E2 use 8-SOP packaging (0.173" width) versus the standard 8-SOIC (0.154" width). While both fit standard SOIC footprints on PCBs, verify your PCB layout and reflow profile compatibility before substitution. Pin-to-pin electrical functionality remains identical.

Q: Which substitute offers the lowest quiescent current?

A: The LM393ADR from UMW and all Diodes Incorporated AS393 variants offer 1mA maximum quiescent current, compared to 2.5mA for the original LM393ADG4. This represents a 60% reduction in standby power consumption, making these parts suitable for battery-powered or energy-constrained applications.

Q: What is the difference between AS393AMTR-E1 and AS393MTR-E1?

A: Both parts are from Diodes Incorporated and use 8-SOIC packaging. The AS393AMTR-E1 specifies input offset voltage of 3mV @ 5V, while AS393MTR-E1 specifies 5mV @ 5V. Both maintain identical supply voltage range, input bias current, and output current specifications. Selection depends on your application's offset voltage tolerance requirements.

Q: Is the LM393ADR suitable for my application if I need MSL-1 rating?

A: Yes. The LM393ADR carries MSL-1 (Unlimited) moisture sensitivity rating, identical to the original LM393ADG4. This rating indicates the part can be stored indefinitely without moisture bake-out requirements prior to reflow soldering.

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