LM393DGKRG4 Equivalent & Substitute Parts

Part Overview

The LM393DGKRG4 is a dual general-purpose comparator IC manufactured by Texas Instruments in 8-VSSOP 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 part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LM393DGKRG4
Category	Linear - Comparator
Type	General Purpose
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
Package	8-VSSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM393DGKRG4 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: 5mV @ 30V or 7mV @ 5V
Input bias current maximum: 0.25µA @ 5V
Quiescent current maximum: 2.5mA or lower
Operating temperature: 0°C ~ 70°C minimum

Mechanical Compatibility Requirements:

8-pin surface mount package (VSSOP, MSOP, or MiniSO variants)
0.118" width tolerance (3.00mm ±0.10mm)

Regulatory Compliance:

ROHS3 compliant
MSL rating 1 (Unlimited)

Substitute parts meeting all electrical and mechanical parameters are grouped as direct equivalents. Parts with extended temperature ranges or automotive qualification are classified as upgrades. Parts with different base product numbers but identical functional specifications are classified as cross-manufacturer alternatives.

Parameter Comparison

Parameter	LM393DGKRG4 (Main)	LM393DGKR	LM393ST	LM2903YST	LM293ST	BA2903SFVM-TR	LM393PT
Manufacturer	Texas Instruments	Rohm Semiconductor	STMicroelectronics	STMicroelectronics	STMicroelectronics	Rohm Semiconductor	STMicroelectronics
Number of Elements	2	2	2	2	2	2	2
Output Type	Open-Collector, Rail-to-Rail	Open-Collector	Open-Collector, Rail-to-Rail	Open-Collector, Rail-to-Rail	Open-Collector, Open-Drain, Rail-to-Rail	Open-Collector	Open-Collector, Rail-to-Rail
Supply Voltage (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
Input Offset Voltage (Max)	5mV @ 30V	7mV @ 5V	5mV @ 30V	7mV @ 5V	5mV @ 30V	7mV @ 5V	5mV @ 30V
Input Bias Current (Max)	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Output Current (Typ)	20mA	—	18mA @ 5V	16mA @ 5V	18mA @ 5V	16mA @ 5V	18mA @ 5V
Quiescent Current (Max)	2.5mA	1mA	2.5mA	2.5mA	2.5mA	1mA	2.5mA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	0°C ~ 70°C
Package / Case	8-VSSOP (0.118", 3.00mm)	8-MSOP/VSSOP (0.118", 3.00mm)	8-MiniSO (0.118", 3.00mm)	8-MiniSO (0.118", 3.00mm)	8-MiniSO (0.118", 3.00mm)	8-MSOP (0.110", 2.80mm)	8-TSSOP (0.173", 4.40mm)
Product Status	Obsolete	Not For New Designs	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalents (Active Product Status):

LM393ST and LM393PT are the primary direct substitutes for the LM393DGKRG4. Both are manufactured by STMicroelectronics with active product status, matching all critical electrical parameters and maintaining the 0°C to 70°C operating temperature range. LM393ST is packaged in 8-MiniSO format, while LM393PT uses 8-TSSOP packaging. Both support identical supply voltage ranges and output current specifications.

Upgraded Alternatives (Extended Temperature Range):

LM2903YST and LM293ST extend the operating temperature range to -40°C to 125°C and -40°C to 105°C respectively, providing enhanced performance for industrial and automotive applications. LM2903YST carries AEC-Q100 automotive qualification. These parts maintain electrical compatibility with the main device while offering broader environmental operating conditions.

Cross-Manufacturer Alternatives:

LM393DGKR (Rohm Semiconductor) and BA2903SFVM-TR (Rohm Semiconductor) provide equivalent functionality with active product status. LM393DGKR is classified as "Not For New Designs" but remains available. BA2903SFVM-TR is actively supported and offers reduced quiescent current (1mA) compared to the main part.

Package Considerations:

All substitute parts maintain 8-pin surface mount configuration with compatible pinouts. LM393PT uses 8-TSSOP packaging (0.173" width), which differs from the original 8-VSSOP format but remains mechanically compatible with standard PCB layouts. BA2903SFVM-TR uses 8-MSOP with 0.110" width (2.80mm), requiring PCB layout verification for tight pitch applications.

Frequently Asked Questions (FAQ)

Q: Can LM393ST directly replace LM393DGKRG4 without PCB modifications?

A: LM393ST maintains identical electrical specifications and pinout compatibility. Both use 8-pin surface mount packages with 0.118" width tolerance. No PCB modifications are required for electrical functionality. Verify PCB footprint compatibility with the 8-MiniSO package outline.

Q: What is the difference between LM393DGKR and LM393ST?

A: LM393DGKR is manufactured by Rohm Semiconductor with "Not For New Designs" status, while LM393ST is manufactured by STMicroelectronics with active product status. Both meet identical electrical parameters. LM393ST is recommended for new designs due to active manufacturer support.

Q: Why should I consider LM2903YST over LM393ST?

A: LM2903YST extends the operating temperature range to -40°C to 125°C and includes AEC-Q100 automotive qualification. Select LM2903YST for applications requiring extended temperature performance or automotive-grade reliability. For standard 0°C to 70°C applications, LM393ST is sufficient.

Q: Is BA2903SFVM-TR compatible with the original LM393DGKRG4?

A: BA2903SFVM-TR meets all electrical compatibility requirements with identical supply voltage range, input offset voltage, and input bias current specifications. The 8-MSOP package (0.110" width) differs slightly from the original 8-VSSOP format. Verify PCB footprint compatibility before selection.

Q: What is the significance of the "Not For New Designs" status on LM393DGKR?

A: This designation indicates the manufacturer (Rohm Semiconductor) is not recommending this part for new circuit designs, though it remains available for existing applications. For new designs, select LM393ST, LM2903YST, or LM293ST, which carry active product status.

Q: Can I use LM393PT as a substitute if my PCB layout uses 8-TSSOP footprint?

A: LM393PT is electrically equivalent and maintains all critical parameters. The 8-TSSOP package (0.173" width) is mechanically compatible with standard surface mount assembly processes. Verify your PCB footprint matches 8-TSSOP specifications before selection.

Q: What are the quiescent current differences among substitute parts?

A: LM393DGKRG4 specifies 2.5mA maximum quiescent current. LM393DGKR and BA2903SFVM-TR reduce this to 1mA, offering improved power efficiency. For battery-powered or low-power applications, these alternatives provide measurable current savings.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL rating 1 (Unlimited), matching the regulatory requirements of the original LM393DGKRG4.

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