LM393PWR Equivalent & Substitute Parts

Part Overview

The LM393PWR is a general-purpose dual comparator IC manufactured by Rohm Semiconductor in 8-TSSOP surface-mount packaging. This device features open-collector output configuration with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The LM393PWR is classified as "Not For New Designs," indicating end-of-life status. Identifying equivalent and substitute parts is necessary for design continuity, inventory management, and sourcing flexibility when the primary part becomes unavailable.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393PWR
Manufacturer	Rohm Semiconductor
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Type	General Purpose Comparator
Number of Elements	2
Output Type	Open-Collector
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	7mV @ 5V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Quiescent (Max)	1mA
Operating Temperature	0°C ~ 70°C
Product Status	Not For New Designs
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM393PWR is determined by the following critical parameters:

Primary Substitution Criteria:

Dual comparator configuration (2 elements)
Open-collector output type
Supply voltage range: 2V ~ 36V (single) or ±1V ~ ±18V (dual)
Input offset voltage: 7mV @ 5V or better
Input bias current: 0.25µA @ 5V or better
Surface-mount packaging (8-TSSOP preferred for direct replacement)

Substitution Categories:

Direct Replacements (8-TSSOP Package): Parts with identical 8-TSSOP packaging enable direct PCB substitution without layout modifications. LM2903PT and LM2903YPT from STMicroelectronics meet all electrical parameters and maintain the same footprint.

Functional Equivalents (Alternative Surface-Mount Packages): Parts with 8-SOIC or 8-MSOP packaging provide electrical equivalence but require PCB layout adjustment. These include LM2903D, LM2903AVQDR, LM2903DGKR, LM2903DR2G, LM2903EDR2G, and LM2903HYDT.

Extended Temperature Range Variants: LM2903AVQPWR and LM2903HYDT offer expanded operating temperature ranges (-40°C to 125°C and -40°C to 150°C respectively) suitable for industrial and automotive applications.

Through-Hole Alternative: LM193AH/NOPB provides functional equivalence in TO-99-8 metal can packaging for through-hole applications, though this requires significant PCB redesign.

Parameter Comparison

Part Number	Manufacturer	Package	Output Type	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Quiescent Current (Max)	Operating Temp	Product Status
LM393PWR	Rohm Semiconductor	8-TSSOP	Open-Collector	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	1mA	0°C ~ 70°C	Not For New Designs
LM2903PT	STMicroelectronics	8-TSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2903YPT	STMicroelectronics	8-TSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	2.5mA	-40°C ~ 125°C	Active (AEC-Q100)
LM193AH/NOPB	Texas Instruments	TO-99-8	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	2mV @ 30V	0.1µA @ 5V	2.5mA	-55°C ~ 125°C	Active
LM2903AVQDR	Texas Instruments	8-SOIC	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	2mV @ 32V	0.25µA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2903AVQPWR	Texas Instruments	8-TSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	2mV @ 5V	0.25µA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2903D	STMicroelectronics	8-SOIC	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2903DGKR	Rohm Semiconductor	8-MSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2903DR2G	onsemi	8-SOIC	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	7mV @ 30V	0.25µA @ 5V	2.5mA	-40°C ~ 105°C	Active
LM2903EDR2G	onsemi	8-SOIC	Open-Collector	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	1mA	-40°C ~ 105°C	Active
LM2903HYDT	STMicroelectronics	8-SOIC	Open-Collector, Rail-to-Rail	2V~36V, ±1V~18V	7mV @ 30V	0.25µA @ 5V	2.5mA	-40°C ~ 150°C	Active (AEC-Q100)

Engineering Selection Recommendations

For Direct PCB Replacement (No Layout Changes): Select LM2903PT or LM2903AVQPWR. Both maintain 8-TSSOP packaging identical to LM393PWR. LM2903PT is suitable for commercial temperature range applications (-40°C to 125°C). LM2903AVQPWR offers identical electrical performance with extended temperature capability. Both are active products with ROHS3 compliance and unlimited moisture sensitivity rating.

For Industrial/Automotive Applications: LM2903YPT and LM2903HYDT are qualified to AEC-Q100 automotive standards. LM2903YPT maintains 8-TSSOP packaging, while LM2903HYDT in 8-SOIC offers the highest operating temperature range (-40°C to 150°C) for extreme thermal environments.

For Alternative Surface-Mount Packages: LM2903D, LM2903AVQDR, LM2903DGKR, LM2903DR2G, and LM2903EDR2G provide functional equivalence with 8-SOIC or 8-MSOP packaging. These require PCB layout modification but offer active product status and extended temperature ranges. LM2903EDR2G matches the original quiescent current specification (1mA) while LM2903DR2G and LM2903HYDT support the widest temperature range among SOIC variants.

For Through-Hole Applications: LM193AH/NOPB in TO-99-8 metal can packaging provides superior input offset voltage (2mV @ 30V) and input bias current (0.1µA @ 5V) specifications. This option requires complete PCB redesign and is suitable only when through-hole mounting is mandatory.

All recommended substitutes maintain ROHS3 compliance, unlimited MSL rating, and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can LM2903PT be used as a direct replacement for LM393PWR without PCB modifications?

A: Yes. LM2903PT shares identical 8-TSSOP packaging, pin configuration, and electrical specifications (supply voltage, input offset, input bias current). The footprint and pinout are compatible for direct substitution. The primary difference is extended operating temperature range (-40°C to 125°C versus 0°C to 70°C) and active product status, both favorable for long-term availability.

Q: What is the difference between LM2903PT and LM2903YPT?

A: Both parts are electrically identical in 8-TSSOP packaging with matching specifications. LM2903YPT carries AEC-Q100 automotive qualification, indicating compliance with automotive reliability and testing standards. Select LM2903YPT for automotive or mission-critical applications requiring formal qualification documentation.

Q: Why do some substitutes have different package types (8-SOIC, 8-MSOP)?

A: Package diversity reflects manufacturing availability across multiple suppliers. While 8-SOIC and 8-MSOP packages maintain identical pin counts and electrical function, they have different physical dimensions and PCB footprints. Substitution with alternative packages requires PCB layout redesign and is suitable only when direct 8-TSSOP replacements are unavailable.

Q: Is LM193AH/NOPB a suitable replacement for LM393PWR?

A: LM193AH/NOPB provides functional equivalence with superior electrical specifications (lower input offset and bias current). However, TO-99-8 through-hole packaging is fundamentally incompatible with the surface-mount 8-TSSOP footprint of LM393PWR. This part is suitable only for new designs or complete PCB redesigns requiring through-hole components.

Q: What does "Not For New Designs" status mean for LM393PWR?

A: This designation indicates the part is end-of-life and no longer recommended for new product development. Existing inventory may remain available, but long-term supply is not guaranteed. Substituting with active-status parts (LM2903 series variants) ensures design continuity and future availability for production and maintenance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and unlimited MSL rating, matching the environmental and regulatory status of LM393PWR. This ensures compatibility with modern manufacturing and environmental requirements.

Q: Which substitute offers the best performance for high-temperature applications?

A: LM2903HYDT supports the highest operating temperature range (-40°C to 150°C) and carries AEC-Q100 automotive qualification. This part is optimal for thermal-demanding environments, though it requires PCB layout modification due to 8-SOIC packaging.

Q: Can I use LM2903AVQDR in place of LM393PWR?

A: LM2903AVQDR is functionally equivalent with superior input offset voltage (2mV @ 32V) and active product status. However, 8-SOIC packaging requires PCB footprint redesign. This substitution is valid when layout modification is feasible and extended temperature range (-40°C to 125°C) is beneficial.

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