LM393PSRG4 Equivalent & Substitute Parts

Part Overview

The LM393PSRG4 is a general-purpose dual comparator IC manufactured by Texas Instruments, featuring open-collector, rail-to-rail output configuration in an 8-SO surface mount package. This device operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), making it suitable for analog signal comparison applications across industrial and consumer electronics.

The LM393PSRG4 carries a Last Time Buy product status, indicating that Texas Instruments has discontinued this part number. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for existing applications.

Key Parameters

Parameter	Value	Specification
Manufacturer	Texas Instruments	Primary source
Part Number	LM393PSRG4	Base product: LM393
Package Type	8-SO (Tape & Reel)	0.209" width, 5.30mm
Number of Elements	2	Dual comparator
Output Type	Open-Collector, Rail-to-Rail	General purpose configuration
Supply Voltage Range	2V ~ 36V (single), ±1V ~ ±18V (dual)	Wide operating range
Input Offset Voltage (Max)	5mV @ 30V	Accuracy specification
Input Bias Current (Max)	0.25µA @ 5V	Input impedance characteristic
Output Current (Typ)	20mA	Sink capability
Quiescent Current (Max)	2.5mA	Power consumption
Operating Temperature	0°C ~ 70°C	Commercial grade
RoHS Status	ROHS3 Compliant	Environmental compliance
Moisture Sensitivity Level	MSL 1 (Unlimited)	Storage and handling

Substitute Part Grouping Explanation

Substitution eligibility for the LM393PSRG4 is determined by the following critical parameters:

Functional Equivalence: All substitute parts must be dual comparators with open-collector, rail-to-rail output configuration and the same base product number (LM393 family).

Electrical Compatibility: Supply voltage range (2V ~ 36V single / ±1V ~ ±18V dual), input offset voltage (5mV maximum @ 30V), input bias current (0.25µA maximum @ 5V), and quiescent current (2.5mA maximum) must be met or exceeded.

Package Compatibility: Surface mount 8-SOIC package variants are acceptable. Package width variations (0.154" to 0.209") are permissible within standard PCB design tolerances for 8-SOIC footprints.

Compliance Requirements: All substitutes must maintain ROHS3 compliance and MSL 1 rating to ensure environmental and handling compatibility.

Product Status Consideration: Active or Last Time Buy status parts are preferred over Not For New Designs classifications for long-term availability assurance.

Parameter Comparison

Parameter	LM393PSRG4 (Main)	LM393PSR	LM393M/NOPB	LM393DR	BA2903YF-CE2
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Rohm Semiconductor	Rohm Semiconductor
Package Type	8-SO (TR)	8-SO (TR)	8-SOIC (Tube)	8-SOIC (CT)	8-SOP (TR)
Package Width	0.209" (5.30mm)	0.209" (5.30mm)	0.154" (3.90mm)	0.154" (3.90mm)	0.173" (4.40mm)
Number of Elements	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
Supply Voltage Range	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	5mV @ 30V	5mV @ 30V	7mV @ 5V	4mV @ 5V
Input Bias Current (Max)	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Output Current (Typ)	20mA	20mA	16mA @ 5V	6mA @ 5V	16mA @ 5V
Quiescent Current (Max)	2.5mA	2.5mA	2.5mA	2.5mA	1mA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C
Product Status	Last Time Buy	Last Time Buy	Active	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: LM393M/NOPB

The LM393M/NOPB is the recommended primary substitute for the LM393PSRG4. This Texas Instruments part maintains identical electrical specifications (5mV input offset voltage @ 30V, 0.25µA input bias current, 2.5mA quiescent current) and operates across the same supply voltage range. The part carries Active product status, ensuring long-term availability and supply chain continuity. Packaging is 8-SOIC in Tube format with a narrower 0.154" width, which is compatible with standard 8-SOIC PCB footprints. ROHS3 compliance and MSL 1 rating match the original specification.

Secondary Substitute: LM393PSR

The LM393PSR provides parametric equivalence to the LM393PSRG4 with identical electrical characteristics and the same 8-SO package configuration (0.209" width). Both parts are Last Time Buy status from Texas Instruments, indicating similar lifecycle positioning. This substitute is optimal for designs requiring exact package geometry matching without PCB layout modifications.

Alternative Substitute: BA2903YF-CE2

The BA2903YF-CE2 from Rohm Semiconductor meets all electrical requirements with superior input offset voltage (4mV @ 5V) and lower quiescent current (1mA). This part features an extended operating temperature range (-40°C ~ 125°C) and carries Active product status. The 8-SOP package (0.173" width) is compatible with 8-SOIC footprints. This substitute is suitable for applications requiring enhanced temperature performance or lower power consumption.

Not Recommended: LM393DR

The LM393DR carries Not For New Designs status and exhibits reduced output current capability (6mA typical @ 5V versus 20mA for the original), making it unsuitable for applications requiring higher sink current. This part should be avoided for new designs despite meeting other electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can I use LM393M/NOPB as a direct replacement for LM393PSRG4?

A: Yes. The LM393M/NOPB is electrically equivalent with identical supply voltage range, input offset voltage, input bias current, and quiescent current specifications. The 8-SOIC package footprint is compatible with standard PCB designs. The primary difference is packaging format (Tube versus Tape & Reel) and package width (0.154" versus 0.209"), both of which are accommodated by standard 8-SOIC PCB layouts.

Q: What is the difference between 8-SO and 8-SOIC packages?

A: Both designations refer to 8-pin surface-mount packages with similar pinouts and footprints. The primary distinction is package width: 8-SO typically refers to 0.209" width, while 8-SOIC typically refers to 0.154" width. Standard PCB footprints accommodate both variants within manufacturing tolerances.

Q: Why is LM393DR listed as Not For New Designs?

A: The LM393DR is classified as Not For New Designs by the manufacturer, indicating end-of-life status. Additionally, this part exhibits reduced output current capability (6mA typical) compared to the LM393PSRG4 (20mA typical), limiting its suitability for applications requiring higher sink current. New designs should prioritize Active status parts such as LM393M/NOPB or BA2903YF-CE2.

Q: Does BA2903YF-CE2 have automotive qualification?

A: Yes. The BA2903YF-CE2 carries AEC-Q100 automotive qualification and operates across an extended temperature range (-40°C ~ 125°C). This part is suitable for automotive and industrial applications requiring enhanced temperature performance beyond the commercial grade 0°C ~ 70°C range of the LM393PSRG4.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (LM393PSR, LM393M/NOPB, LM393DR, and BA2903YF-CE2) maintain ROHS3 compliance and MSL 1 rating, ensuring environmental and handling compatibility with the original LM393PSRG4 specification.

Q: What is the significance of Last Time Buy status?

A: Last Time Buy status indicates that the manufacturer has discontinued the part and will no longer accept new orders after a specified date. For the LM393PSRG4, this status necessitates identifying substitute parts to ensure long-term design support. Active status parts such as LM393M/NOPB provide superior long-term availability assurance.

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