LM393AD Equivalent & Substitute Parts

Part Overview

The LM393AD is a general-purpose dual 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 LM393AD is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain functional equivalence while offering active product status and improved availability.

Key Parameters

Parameter	LM393AD
Manufacturer	Texas Instruments
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)	2mV @ 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 of the LM393AD is determined by strict equivalence across the following critical parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width) — physical and electrical compatibility
Number of Elements: 2 — functional requirement
Output Type: Open-Collector, Rail-to-Rail — circuit interface requirement
Voltage - Supply, Single/Dual (±): 2V ~ 36V, ±1V ~ 18V — power supply compatibility
Mounting Type: Surface Mount — assembly process compatibility
RoHS Status: ROHS3 Compliant — regulatory compliance

Substitute parts are grouped into two categories:

Category 1: Direct Functional Equivalents (Texas Instruments Active Products) Parts that maintain identical electrical specifications and package dimensions with active product status.

Category 2: Cross-Manufacturer Equivalents (Diodes Incorporated, Rohm Semiconductor, UMW) Parts that meet all critical electrical and mechanical parameters with extended temperature ranges or enhanced specifications, offering superior availability and active lifecycle support.

Parameter Comparison

Parameter	LM393AD	LM393ADR (UMW)	LM393M/NOPB (TI)	LM393MX/NOPB (TI)	AS393AMTR-E1 (Diodes)	AS393AMTR-G1 (Diodes)	AS393MTR-E1 (Diodes)	AS393MTR-G1 (Diodes)	BA10393F-E2 (Rohm)	BA2903SF-E2 (Rohm)	BA2903YF-CE2 (Rohm)
Number of Elements	2	2	2	2	2	2	2	2	2	2	2
Output Type	Open-Collector, Rail-to-Rail	Open-Collector, Rail-to-Rail	Open-Collector, Rail-to-Rail	Open-Collector, Rail-to-Rail	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	2mV @ 30V	5mV	5mV @ 30V	5mV @ 30V	3mV @ 5V	3mV @ 1.4V	5mV @ 5V	5mV @ 5V	5mV @ 5V	7mV @ 5V	4mV @ 5V
Current - Input Bias (Max)	0.25µA @ 5V	250nA	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.4µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Current - Output (Typ)	20mA	16mA	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V
Current - Quiescent (Max)	2.5mA	1mA	2.5mA	2.5mA	1mA	1mA	1mA	1mA	1mA	1mA	1mA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C (TA)	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.173", 4.40mm Width)	8-SOIC (0.173", 4.40mm Width)	8-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

LM393M/NOPB and LM393MX/NOPB (Texas Instruments) are the preferred direct replacements for LM393AD. Both maintain identical electrical specifications, package dimensions (8-SOIC 0.154" width), and operating temperature range (0°C ~ 70°C). These parts carry active product status and ROHS3 compliance, ensuring long-term availability and regulatory support.

Secondary Substitutes (Extended Temperature Range)

AS393AMTR-E1, AS393AMTR-G1, AS393MTR-E1, and AS393MTR-G1 (Diodes Incorporated) provide functional equivalence with extended operating temperature ranges (-40°C ~ 85°C). These parts are suitable for applications requiring broader thermal performance while maintaining all critical electrical parameters. Moisture sensitivity levels vary; AS393AMTR series offers MSL 1 (Unlimited), while AS393MTR series specifies MSL 3 (168 Hours).

Tertiary Substitutes (Alternative Manufacturers)

BA10393F-E2 (Rohm Semiconductor) and BA2903SF-E2 (Rohm Semiconductor) offer functional equivalence with extended temperature ranges. BA2903YF-CE2 (Rohm Semiconductor) extends operating temperature to -40°C ~ 125°C and includes AEC-Q100 automotive qualification, suitable for automotive-grade applications. Note: Rohm parts feature 8-SOIC packages with 0.173" width (4.40mm), requiring PCB layout verification for pin-to-pin compatibility.

Availability Considerations

LM393ADR (UMW) provides active product status with high inventory availability (105,100 pcs) and maintains the original 8-SOIC 0.154" package specification. This option is suitable for high-volume production requiring extended supply chain security.

Frequently Asked Questions (FAQ)

Q: Can LM393M/NOPB directly replace LM393AD without PCB modifications?

A: Yes. Both parts share identical 8-SOIC (0.154", 3.90mm Width) package dimensions, pin configuration, and electrical specifications. No PCB layout changes are required.

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

A: Both parts are manufactured by Diodes Incorporated and share identical electrical specifications and package dimensions. The primary difference is moisture sensitivity level: AS393AMTR-E1 specifies MSL 1 (Unlimited), while AS393MTR-E1 specifies MSL 3 (168 Hours). Selection depends on storage and handling requirements.

Q: Are Rohm BA2903 series parts pin-compatible with LM393AD?

A: BA2903 parts are functionally equivalent but feature a wider 8-SOIC package (0.173", 4.40mm width) compared to LM393AD (0.154", 3.90mm width). PCB layout verification is required to confirm mechanical fit within existing footprints.

Q: Which substitute offers the widest operating temperature range?

A: BA2903YF-CE2 (Rohm Semiconductor) operates from -40°C ~ 125°C and includes AEC-Q100 automotive qualification. This part is recommended for applications requiring extended thermal performance and automotive-grade reliability.

Q: Is LM393ADR suitable for high-volume production?

A: Yes. LM393ADR (UMW) maintains active product status with substantial inventory (105,100 pcs) and identical package specifications to LM393AD. This part is suitable for production continuity and supply chain security.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

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