LM293ADRG4 Equivalent & Substitute Parts

Part Overview

The LM293ADRG4 is a dual general-purpose comparator manufactured by Texas Instruments in 8-SOIC surface mount packaging. This device features open-collector, open-drain, and rail-to-rail output configuration with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The LM293ADRG4 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LM293ADRG4
Category	Linear Comparator
Type	General Purpose
Number of Elements	2
Output Type	Open-Collector, Open-Drain, Rail-to-Rail
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Voltage - Supply, 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	-25°C ~ 85°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LM293ADRG4 is determined by the following critical parameters:

Number of elements: 2 comparators
Output type: Open-collector configuration
Package: 8-SOIC surface mount form factor
Supply voltage range: 2V to 36V (single) or ±1V to ±18V (dual)
Input offset voltage: Maximum 2mV to 7mV
Input bias current: Maximum 0.25µA to 0.4µA
Output current: Typical 16mA to 20mA
Quiescent current: Maximum 1mA to 2.5mA
Operating temperature: -25°C to 85°C minimum

Substitute parts are grouped into two categories: direct replacements (same manufacturer, active product status) and functional equivalents (alternative manufacturers, enhanced specifications or automotive qualification).

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply (V)	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Operating Temp (°C)	Package	Output Type
LM293ADRG4	Texas Instruments	Obsolete	2-36, ±1-18	2mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-25 to 85	8-SOIC	Open-Collector, Open-Drain, Rail-to-Rail
LM293ADR	Texas Instruments	Active	2-36, ±1-18	2mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-25 to 85	8-SOIC	Open-Collector, Open-Drain, Rail-to-Rail
LM2903WDT	STMicroelectronics	Active	2-36, ±1-18	7mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-40 to 125	8-SOIC	Open-Collector, Rail-to-Rail
LM2903WYDT	STMicroelectronics	Active	2-36, ±1-18	7mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-40 to 125	8-SOIC	Open-Collector, Rail-to-Rail
AS393AMTR-E1	Diodes Incorporated	Active	2-36, ±1-18	3mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40 to 85	8-SOIC	Open-Collector
AS393AMTR-G1	Diodes Incorporated	Active	2-36, ±1-18	3mV @ 1.4V	0.4µA @ 5V	16mA	1mA	-40 to 85	8-SOIC	Open-Collector
AS393MTR-E1	Diodes Incorporated	Active	2-36, ±1-18	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40 to 85	8-SOIC	Open-Collector
AS393MTR-G1	Diodes Incorporated	Active	2-36, ±1-18	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40 to 85	8-SOIC	Open-Collector
BA10393F-E2	Rohm Semiconductor	Active	2-36, ±1-18	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40 to 85	8-SOP	Open-Collector
BA2903SF-E2	Rohm Semiconductor	Active	2-36, ±1-18	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40 to 105	8-SOP	Open-Collector
BA2903YF-CE2	Rohm Semiconductor	Active	2-36, ±1-18	4mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40 to 125	8-SOP	Open-Collector

Engineering Selection Recommendations

Direct Replacement (Recommended for Pin-Compatible Designs)

LM293ADR is the primary substitute for LM293ADRG4. Both are Texas Instruments products with identical electrical specifications and 8-SOIC packaging. LM293ADR carries active product status and is available in higher inventory quantities, ensuring long-term supply continuity. This part is ROHS3 compliant with MSL 1 rating.

Functional Equivalents with Extended Temperature Range

LM2903WDT and LM2903WYDT (STMicroelectronics) provide functional equivalence with extended operating temperature range (-40°C to 125°C). These parts maintain identical supply voltage and output current specifications. LM2903WYDT includes automotive qualification (AEC-Q100), suitable for automotive applications. Input offset voltage increases to 7mV maximum, which remains acceptable for general-purpose comparator applications.

Alternative Manufacturers with Reduced Quiescent Current

AS393 series (Diodes Incorporated) and BA2903/BA10393 series (Rohm Semiconductor) offer reduced quiescent current (1mA maximum versus 2.5mA) and lower output current requirements (16mA typical versus 20mA). These parts maintain open-collector output configuration and identical supply voltage range. Input offset voltage specifications vary from 3mV to 5mV, within acceptable tolerance for general-purpose applications.

Automotive-Qualified Option

BA2903YF-CE2 (Rohm Semiconductor) provides automotive-grade qualification (AEC-Q100) with extended temperature range (-40°C to 125°C) and 4mV input offset voltage. This part is suitable for automotive and industrial applications requiring enhanced reliability.

All substitute parts maintain ROHS3 compliance and REACH unaffected status. Package variations (8-SOIC versus 8-SOP) require PCB layout verification for mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can LM293ADR directly replace LM293ADRG4 without circuit modification?

A: Yes. LM293ADR is electrically and mechanically identical to LM293ADRG4. Both use 8-SOIC packaging with identical pin configuration, supply voltage range, and output specifications. The primary difference is product status (active versus obsolete) and packaging format (Cut Tape & Digi-Reel versus Tape & Reel).

Q: What is the difference between LM2903WDT and LM2903WYDT?

A: Both parts are functionally equivalent with identical electrical specifications. LM2903WYDT includes automotive qualification (AEC-Q100) and is graded for automotive applications. LM2903WDT is the industrial-grade equivalent. Both extend operating temperature to -40°C to 125°C compared to the original -25°C to 85°C range.

Q: Are AS393 and BA2903 series parts pin-compatible with LM293ADRG4?

A: Yes, all substitute parts listed maintain 8-SOIC or 8-SOP pin configuration compatible with the original part. However, BA10393F-E2 and BA2903 series use 8-SOP packaging (0.173" width) versus the original 8-SOIC (0.154" width). Verify PCB footprint compatibility before substitution.

Q: What is the significance of input offset voltage differences (2mV to 7mV)?

A: Input offset voltage determines the accuracy of voltage comparison at the threshold point. Lower values (2mV to 3mV) provide higher precision. For general-purpose applications, differences between 2mV and 7mV are typically acceptable. Applications requiring precision threshold detection should prioritize parts with lower input offset specifications.

Q: Which substitute part offers the best long-term availability?

A: LM293ADR (Texas Instruments) and AS393MTR-E1 (Diodes Incorporated) show the highest inventory levels (80,523 and 354,160 units respectively) and active product status, indicating strong long-term availability and supply chain stability.

Q: Is automotive qualification necessary for my application?

A: Automotive qualification (AEC-Q100) is required only for automotive and safety-critical applications. LM2903WYDT and BA2903YF-CE2 provide this certification. For industrial and consumer applications, non-automotive qualified parts are acceptable.

Q: What packaging format should I select?

A: LM293ADR, LM2903WDT, and AS393 series are available in Tape & Reel (TR) or Cut Tape & Digi-Reel (CT) formats. Select based on procurement volume and assembly requirements. TR format is standard for high-volume production; CT format suits lower-volume or prototype applications.

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