LM393ADRG4 Equivalent & Substitute Parts

Part Overview

The LM393ADRG4 is a general-purpose dual comparator IC manufactured by Texas Instruments, featuring open-collector, rail-to-rail output configuration in an 8-SOIC surface-mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The LM393 base product line remains actively produced by multiple manufacturers in various package and performance grades, enabling direct functional replacement in applications requiring dual-channel voltage comparison across a 2V to 36V supply range.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393ADRG4
Manufacturer	Texas Instruments
Category	Linear
Type	General Purpose Comparator
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Voltage Supply Range (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
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM393ADRG4 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Dual comparator configuration (2 elements)
Open-collector output type
Supply voltage range: 2V ~ 36V (single) or ±1V ~ 18V (dual)
8-SOIC package footprint (0.154", 3.90mm width)
Surface-mount technology
ROHS3 compliance

Performance Parameters (Allowable Variation):

Input offset voltage: up to 5mV (original: 2mV)
Input bias current: up to 0.4µA (original: 0.25µA)
Output current: 16mA minimum (original: 20mA typical)
Quiescent current: up to 2.5mA (original: 2.5mA)
Operating temperature: 0°C ~ 85°C acceptable (original: 0°C ~ 70°C)

Substitute parts meeting these criteria are functionally equivalent for standard voltage comparison applications. Parts with extended temperature ranges (-40°C ~ 85°C or higher) provide additional operational margin and are suitable for replacement in all original application contexts.

Parameter Comparison

Part Number	Manufacturer	Product Status	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Package	Inventory
LM393ADRG4	Texas Instruments	Obsolete	2mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	8-SOIC	2920 Pcs
LM393ADR	UMW	Active	5mV	250nA	16mA	1mA	0°C ~ 70°C	8-SOP	105100 Pcs
LM393M/NOPB	Texas Instruments	Active	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC	5381 Pcs
LM393MX/NOPB	Texas Instruments	Active	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC	82700 Pcs
AS393AMTR-E1	Diodes Incorporated	Active	3mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC	232200 Pcs
AS393AMTR-G1	Diodes Incorporated	Active	3mV @ 1.4V	0.4µA @ 5V	16mA	1mA	-40°C ~ 85°C	8-SOIC	25475 Pcs
AS393MTR-E1	Diodes Incorporated	Active	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC	354160 Pcs
AS393MTR-G1	Diodes Incorporated	Active	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC	300400 Pcs
BA10393F-E2	Rohm Semiconductor	Active	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOP	105300 Pcs
BA2903F-E2	Rohm Semiconductor	Active	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	8-SOP	7600 Pcs
BA2903SF-E2	Rohm Semiconductor	Active	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 105°C	8-SOP	20300 Pcs

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LM393MX/NOPB and LM393M/NOPB are direct Texas Instruments alternatives maintaining identical electrical specifications and 8-SOIC package geometry. Both are active products with ROHS3 compliance and MSL-1 moisture sensitivity rating. LM393MX/NOPB offers superior inventory availability (82700 units) and cut-tape packaging suitable for high-volume production.

Extended Temperature Range Alternatives:

AS393MTR-E1, AS393MTR-G1, AS393AMTR-E1, and AS393AMTR-G1 from Diodes Incorporated provide -40°C ~ 85°C operating range, exceeding the original 0°C ~ 70°C specification. These parts maintain 8-SOIC footprint compatibility and ROHS3 compliance. AS393MTR-E1 offers the highest inventory level (354160 units) with standard MSL-3 moisture sensitivity. AS393AMTR-E1 provides superior input offset voltage specification (3mV) with extended temperature range and MSL-1 rating.

Alternative Package Options:

LM393ADR (UMW) and BA10393F-E2 (Rohm Semiconductor) provide functionally equivalent performance in 8-SOP package variants. These are suitable only for designs where package footprint modification is acceptable. BA2903F-E2 and BA2903SF-E2 extend operating temperature to -40°C ~ 125°C and -40°C ~ 105°C respectively, with trade-off of slightly elevated input offset voltage (7mV).

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity levels range from MSL-1 (unlimited) to MSL-3 (168 hours), with MSL-1 parts recommended for standard storage and handling conditions.

Frequently Asked Questions (FAQ)

Q: Can LM393MX/NOPB directly replace LM393ADRG4 without PCB modification?

A: Yes. Both parts use identical 8-SOIC package geometry (0.154", 3.90mm width) and pin configuration. Electrical specifications are compatible within standard application tolerances. No PCB layout changes are required.

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

A: Both are Texas Instruments LM393 variants with identical electrical performance and 8-SOIC packaging. The primary difference is packaging format: LM393M/NOPB is supplied in tube packaging, while LM393MX/NOPB is supplied in cut-tape and digi-reel format. Selection depends on production volume and handling requirements.

Q: Are Diodes Incorporated AS393 series parts pin-compatible with the original LM393ADRG4?

A: Yes. AS393AMTR-E1, AS393AMTR-G1, AS393MTR-E1, and AS393MTR-G1 maintain identical 8-SOIC pin configuration and functional equivalence. Extended operating temperature range (-40°C ~ 85°C) provides additional margin beyond the original 0°C ~ 70°C specification.

Q: What is the impact of using parts with higher input offset voltage (5mV vs. 2mV)?

A: Input offset voltage determines the accuracy of voltage comparison at the threshold point. The original LM393ADRG4 specifies 2mV maximum offset. Substitute parts with 5mV offset introduce 3mV additional uncertainty in comparison threshold. This is acceptable for most general-purpose applications but may require circuit-level compensation in precision measurement circuits.

Q: Can BA2903F-E2 or BA2903SF-E2 be used as direct replacements?

A: BA2903F-E2 and BA2903SF-E2 are functionally equivalent but use 8-SOP package (0.173", 4.40mm width) instead of 8-SOIC (0.154", 3.90mm width). PCB footprint modification is required. These parts are suitable only if design flexibility permits package change. Extended temperature range (-40°C ~ 125°C and -40°C ~ 105°C respectively) provides operational advantage in extreme temperature environments.

Q: What is the significance of MSL-3 moisture sensitivity rating on AS393MTR-E1 and AS393MTR-G1?

A: MSL-3 rating requires storage at ≤30°C and ≤60% relative humidity, with maximum floor-life of 168 hours after bag opening. MSL-1 parts (LM393M/NOPB, LM393MX/NOPB, AS393AMTR-E1) have unlimited shelf-life. For standard manufacturing environments with controlled storage, MSL-3 parts present no practical limitation. High-volume or extended-storage applications should prioritize MSL-1 alternatives.

Q: Which substitute offers the best inventory availability?

A: AS393MTR-E1 (Diodes Incorporated) provides the highest inventory level at 354160 units, followed by AS393MTR-G1 at 300400 units and LM393MX/NOPB at 82700 units. For immediate availability and production continuity, AS393MTR-E1 is the optimal choice.

Q: Are there performance differences between UMW LM393ADR and Texas Instruments LM393MX/NOPB?

A: Both maintain identical supply voltage range and output type. UMW LM393ADR achieves lower quiescent current (1mA vs. 2.5mA) and uses 8-SOP package. Texas Instruments LM393MX/NOPB maintains original 8-SOIC footprint. Selection depends on package compatibility requirements and power consumption constraints.

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