LM393WPT Equivalent & Substitute Parts

Part Overview

The LM393WPT is a dual general-purpose comparator manufactured by Rohm Semiconductor in 8-TSSOP 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 LM393WPT is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393WPT
Manufacturer	Rohm Semiconductor
Product Category	Linear Comparator
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Supply Voltage Range	2V ~ 36V (Single), ±1V ~ 18V (Dual)
Input Offset Voltage (Max)	7mV @ 5V
Input Bias Current (Max)	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V
Quiescent Current (Max)	1mA
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LM393WPT are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Electrical & Package Equivalence): Parts that maintain identical or superior electrical specifications within the same 8-TSSOP package footprint. These parts are pin-compatible and functionally interchangeable with the LM393WPT.

Similar Substitutes (Functional Equivalence with Package Variation): Parts that maintain core electrical specifications but differ in package type (8-SOIC, 8-DIP, 8-VSSOP). These require PCB layout modification but provide functional equivalence.

Critical Substitution Parameters:

Supply voltage range compatibility (minimum 2V ~ 36V single or ±1V ~ 18V dual)
Output type (Open-Collector configuration required)
Number of elements (dual comparator, 2 channels)
Package footprint (8-TSSOP preferred for direct substitution)
Operating temperature range (-40°C ~ 85°C minimum)
Input offset voltage and bias current specifications
Output current capability (minimum 16mA @ 5V)

Parameter Comparison

Parameter	LM393WPT (Main)	LM2903PT	LM2903YPT	AS393MTR-E1	AS393P-E1	LMV393IDDUR	LMV393M/NOPB	LMV393MMX/NOPB	LMV393MX/NOPB	LM2903AVQPWR	LM2903AVQPWRG4Q1
Manufacturer	Rohm	STMicroelectronics	STMicroelectronics	Diodes Inc.	Diodes Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Package Type	8-TSSOP	8-TSSOP	8-TSSOP	8-SOIC	8-DIP	8-VSSOP	8-SOIC	8-VSSOP	8-SOIC	8-TSSOP	8-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Through Hole	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Supply Voltage Range	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V
Output Type	Open-Collector, Rail-to-Rail	Open-Collector, Rail-to-Rail	Open-Collector, Rail-to-Rail	Open-Collector	Open-Collector	Open-Collector	CMOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	Open-Collector, Rail-to-Rail	Open-Collector, Rail-to-Rail
Input Offset Voltage (Max)	7mV @ 5V	7mV @ 5V	7mV @ 5V	5mV @ 5V	5mV @ 5V	7mV @ 5V	7mV @ 5V	7mV @ 5V	7mV @ 5V	2mV @ 5V	2mV @ 5V
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	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	84mA @ 5V	84mA @ 5V	84mA @ 5V	84mA @ 5V	20mA	20mA
Quiescent Current (Max)	1mA	2.5mA	2.5mA	1mA	1mA	250µA	300µA	300µA	300µA	2.5mA	2.5mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Active	Last Time Buy	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	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Tier 1 - Direct Package & Electrical Substitutes (8-TSSOP):

LM2903PT and LM2903YPT from STMicroelectronics are the primary direct substitutes. Both maintain the 8-TSSOP package footprint and support the full 2V ~ 36V / ±1V ~ 18V supply voltage range. LM2903YPT includes AEC-Q100 automotive qualification and extends operating temperature to -40°C ~ 125°C, providing enhanced reliability for automotive and extended-temperature applications. LM2903PT is suitable for standard industrial applications.

LM2903AVQPWR and LM2903AVQPWRG4Q1 from Texas Instruments offer improved input offset voltage (2mV vs. 7mV) and higher output current (20mA vs. 16mA). LM2903AVQPWRG4Q1 includes AEC-Q100 automotive qualification. Both support the full voltage range and -40°C ~ 125°C operating temperature.

Tier 2 - Functional Substitutes with Package Variation:

AS393MTR-E1 (8-SOIC) and AS393P-E1 (8-DIP) from Diodes Incorporated provide functional equivalence with improved input offset voltage (5mV). AS393MTR-E1 requires surface-mount PCB layout modification. AS393P-E1 is through-hole mounted, suitable for legacy or prototype applications.

Tier 3 - Limited Supply Voltage Range Substitutes:

LMV393 series parts (LMV393IDDUR, LMV393M/NOPB, LMV393MMX/NOPB, LMV393MX/NOPB) from Texas Instruments operate within 2.7V ~ 5.5V supply range, restricting use to low-voltage applications. These parts offer higher output current (84mA) and lower quiescent current (250µA ~ 300µA) but are not suitable for applications requiring the full 2V ~ 36V range of the LM393WPT.

Product Status Considerations:

All substitute parts maintain active or last-time-buy status, ensuring availability for production. The LM393WPT's obsolete status necessitates transition to active alternatives. All substitutes are ROHS3 compliant and maintain compatibility with existing supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can LM2903PT directly replace LM393WPT without PCB modification?

A: Yes. LM2903PT is pin-compatible in the 8-TSSOP package and maintains identical electrical specifications for supply voltage, output type, and core performance parameters. No PCB layout changes are required.

Q: What is the key difference between LM2903PT and LM2903YPT?

A: Both are electrically identical in 8-TSSOP packaging. LM2903YPT includes AEC-Q100 automotive qualification and extends operating temperature to -40°C ~ 125°C, compared to LM2903PT's standard -40°C ~ 85°C range. Select LM2903YPT for automotive or extended-temperature applications.

Q: Why do LMV393 series parts have different supply voltage limits?

A: LMV393 series comparators are optimized for low-voltage applications (2.7V ~ 5.5V). The LM393WPT supports extended voltage range (2V ~ 36V), making LMV393 unsuitable for high-voltage circuits. Use LM2903 series for full voltage range compatibility.

Q: Can AS393MTR-E1 (8-SOIC) replace LM393WPT (8-TSSOP)?

A: AS393MTR-E1 provides functional equivalence but requires PCB layout modification due to different package footprint. The 8-SOIC package has different pin spacing and dimensions than 8-TSSOP. Electrical specifications are compatible; package change necessitates design revision.

Q: What is the advantage of LM2903AVQPWRG4Q1 over LM2903PT?

A: LM2903AVQPWRG4Q1 offers superior input offset voltage (2mV vs. 7mV), higher output current (20mA vs. 16mA), extended operating temperature (-40°C ~ 125°C), and AEC-Q100 automotive qualification. Use for precision applications or automotive designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the LM393WPT's environmental standards.

Q: Which substitute offers the lowest quiescent current?

A: LMV393IDDUR provides the lowest quiescent current at 250µA maximum. However, its 2.7V ~ 5.5V supply voltage range limits use to low-voltage applications only.

Q: Can I use AS393P-E1 (8-DIP through-hole) in a surface-mount design?

A: AS393P-E1 is through-hole mounted and incompatible with surface-mount PCB designs. Use 8-TSSOP or 8-SOIC surface-mount alternatives (LM2903PT, LM2903YPT, AS393MTR-E1) for SMT applications.

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