LM193 MDE Equivalent & Substitute Parts

Part Overview

The LM193 MDE is a low-power, low-offset voltage dual comparator manufactured by Texas Instruments, designed for general-purpose applications requiring open-collector, rail-to-rail output configuration. This die-form component operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), with maximum input offset voltage of 5mV at 5V and quiescent current not exceeding 2.5mA. The part maintains active product status with 843 pieces in current inventory and full ROHS3 compliance.

Equivalent and substitute parts are necessary when die-form packaging is unavailable, when alternative package types are required for specific PCB assembly processes, or when sourcing from alternative manufacturers becomes necessary due to supply constraints or design requirements.

Key Parameters

Parameter	Value	Specification Notes
Manufacturer Part Number	LM193 MDE	Texas Instruments
Category	Linear Comparator	General Purpose
Number of Elements	2	Dual comparator
Output Type	Open-Collector, Rail-to-Rail	Primary substitution criterion
Voltage Supply Range	2V ~ 36V (single), ±1V ~ ±18V (dual)	Critical compatibility parameter
Input Offset Voltage (Max)	5mV @ 5V	Precision specification
Input Bias Current (Max)	1000pA @ 5V	High-impedance input
Output Current (Typ)	6mA	Drive capability
Quiescent Current (Max)	2.5mA	Power consumption
CMRR / PSRR (Typ)	60dB CMRR, 60dB PSRR	Noise rejection
Propagation Delay (Max)	700ns (Typ)	Timing specification
Operating Temperature	-55°C ~ 125°C	Extended industrial range
Package Type	Die	Bare die form
RoHS Status	ROHS3 Compliant	Environmental compliance

Substitute Part Grouping Explanation

Substitution of the LM193 MDE is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Output Type: Must be Open-Collector, Rail-to-Rail (or compatible subset)
Supply Voltage Range: Must support 2V ~ 36V (single) or ±1V ~ ±18V (dual)
Number of Elements: Must be 2 (dual comparator configuration)
Quiescent Current: Must not exceed 2.5mA maximum
RoHS Compliance: Must maintain ROHS3 status

Secondary Compatibility Parameters:

Input Offset Voltage: Acceptable range up to 8mV @ 5V for general-purpose applications
Input Bias Current: Acceptable up to 0.4µA @ 5V
Output Current: Acceptable from 6mA to 16mA typical
Operating Temperature: Extended range (-55°C to 125°C) preferred; commercial range (0°C to 70°C) acceptable for non-military applications
Package Form: Transition from die to standard surface-mount packages (8-SOIC, 8-TSSOP, 8-MSOP, 8-UFSON)

Substitutes are grouped into three categories:

Diodes Incorporated AP393 Series (AP393AM8G-13, AP393ASG-13, AP393SG-13): CMOS/TTL-compatible output types with 8-MSOP or 8-SOP packaging, operating temperature 0°C to 70°C
STMicroelectronics & onsemi LM2903 Series (LM193QT, LM2903D, LM2903PT, LM2903DR2G, LM2903DMR2G, LM2903EDR2G): Open-Collector, Rail-to-Rail output with extended temperature range (-40°C to 125°C), available in 8-SOIC, 8-TSSOP, and 8-UFSON packages
Rohm Semiconductor LM2903DGKR: Open-Collector, Rail-to-Rail output in 8-MSOP/VSSOP package with extended temperature range (-40°C to 125°C)

Parameter Comparison

Part Number	Manufacturer	Package	Output Type	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range	RoHS
LM193 MDE	Texas Instruments	Die	Open-Collector, Rail-to-Rail	2V~36V, ±1V~±18V	5mV @ 5V	1000pA @ 5V	6mA	2.5mA	-55°C ~ 125°C	ROHS3
AP393AM8G-13	Diodes Incorporated	8-MSOP	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~36V, ±1V~±18V	8mV @ 5V	0.4µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	ROHS3
AP393ASG-13	Diodes Incorporated	8-SOIC	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~36V, ±1V~±18V	8mV @ 5V	0.4µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	ROHS3
AP393SG-13	Diodes Incorporated	8-SOIC	Open-Collector	2V~36V, ±1V~±18V	5mV @ 5V	0.25µA @ 5V	16mA	2.5mA	0°C ~ 70°C	ROHS3
LM193QT	STMicroelectronics	8-UFSON (2x2)	Open-Collector, Rail-to-Rail	2V~36V, ±1V~±18V	—	—	—	2.5mA	—	ROHS3
LM2903D	STMicroelectronics	8-SOIC	Open-Collector, Rail-to-Rail	2V~36V, ±1V~±18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	ROHS3
LM2903DGKR	Rohm Semiconductor	8-MSOP/VSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~±18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	ROHS3
LM2903DMR2G	onsemi	8-MSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~±18V	7mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 105°C	ROHS3
LM2903DR2G	onsemi	8-SOIC	Open-Collector, Rail-to-Rail	2V~36V, ±1V~±18V	7mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 105°C	ROHS3
LM2903PT	STMicroelectronics	8-TSSOP	Open-Collector, Rail-to-Rail	2V~36V, ±1V~±18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	ROHS3
LM2903EDR2G	onsemi	8-SOIC	—	2V~36V, ±1V~±18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 105°C	ROHS3

Engineering Selection Recommendations

For Direct Functional Replacement with Extended Temperature Range:

Select LM2903PT (STMicroelectronics, 8-TSSOP) or LM2903D (STMicroelectronics, 8-SOIC) when transitioning from die form to standard surface-mount packages. Both maintain Open-Collector, Rail-to-Rail output configuration, support the full supply voltage range (2V~36V, ±1V~±18V), and extend operating temperature to -40°C ~ 125°C. These parts carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, suitable for high-reliability applications.

For Compact Package Requirements:

LM2903DGKR (Rohm Semiconductor, 8-MSOP/VSSOP) or LM2903DMR2G (onsemi, 8-MSOP) provide the smallest footprint while maintaining Open-Collector, Rail-to-Rail output and full supply voltage compatibility. Both support extended temperature range (-40°C ~ 125°C) and carry ROHS3 compliance with MSL 1 rating.

For Smallest Form Factor (Flip-Chip):

LM193QT (STMicroelectronics, 8-UFSON 2x2) offers the most compact package option with Open-Collector, Rail-to-Rail output and full supply voltage range support. MSL 1 (Unlimited) rating indicates superior moisture resistance for automated assembly processes.

For Commercial Temperature Range Applications (0°C ~ 70°C):

AP393SG-13 (Diodes Incorporated, 8-SOIC) provides exact input offset voltage match (5mV @ 5V) with Open-Collector output type and full supply voltage compatibility. This part offers the lowest cost alternative when extended temperature range is not required.

For Lower Quiescent Current:

LM2903EDR2G (onsemi, 8-SOIC) reduces maximum quiescent current to 1mA (versus 2.5mA standard), beneficial for battery-powered or ultra-low-power applications. Maintains full supply voltage range and ROHS3 compliance with -40°C ~ 105°C operating range.

All recommended substitutes maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q1: Can the LM193 MDE die form be directly replaced with a packaged equivalent?

A: Yes. The LM193 MDE can be replaced with any packaged comparator maintaining identical electrical specifications: Open-Collector, Rail-to-Rail output, 2V~36V (±1V~±18V) supply voltage range, and 2.5mA maximum quiescent current. Package selection depends on assembly process requirements (surface mount vs. through-hole) and PCB space constraints. LM2903PT (8-TSSOP) and LM2903D (8-SOIC) are direct functional equivalents.

Q2: What is the primary difference between AP393 series and LM2903 series substitutes?

A: The AP393 series (Diodes Incorporated) operates within commercial temperature range (0°C ~ 70°C) and features multiple output type options (CMOS, DTL, ECL, MOS, Open-Collector, TTL). The LM2903 series (STMicroelectronics, onsemi, Rohm) operates within extended industrial temperature range (-40°C ~ 125°C) and maintains consistent Open-Collector, Rail-to-Rail output configuration. Select AP393 for cost-sensitive, non-industrial applications; select LM2903 for automotive, industrial, or military-grade reliability requirements.

Q3: Are input offset voltage differences between 5mV and 7mV significant for substitution?

A: Input offset voltage differences of 2mV are within acceptable tolerance for general-purpose comparator applications. The LM193 MDE specifies 5mV maximum at 5V, while most LM2903 variants specify 7mV maximum. This 40% increase remains negligible for threshold detection, window comparator, and level-shifting applications. For precision analog-to-digital conversion or high-resolution measurement circuits, verify offset voltage performance through circuit simulation or prototype testing.

Q4: Can I substitute a part with lower input bias current (0.25µA vs. 1000pA)?

A: Yes. Lower input bias current (0.25µA) is a performance improvement, not a limitation. Reduced bias current decreases input loading effects and improves high-impedance source compatibility. This substitution is universally acceptable and beneficial for sensor interface and precision measurement applications.

Q5: What package should I select for high-volume surface-mount assembly?

A: For automated pick-and-place assembly, select either 8-TSSOP (LM2903PT) or 8-SOIC (LM2903D, LM2903DR2G). Both packages offer standard lead pitch (0.65mm for TSSOP, 1.27mm for SOIC), excellent solder joint reliability, and widespread assembly equipment compatibility. For ultra-compact designs, 8-MSOP (LM2903DGKR, LM2903DMR2G) or 8-UFSON (LM193QT) provide smaller footprints with equivalent electrical performance.

Q6: Which substitute offers the best long-term availability?

A: LM2903PT (STMicroelectronics) and LM2903D (STMicroelectronics) maintain the highest inventory levels (325,100 and 31,475 pieces respectively) and represent industry-standard comparator packages with multi-decade production history. Both manufacturers maintain active product status with committed long-term supply. onsemi LM2903 variants (LM2903DR2G: 136,144 pieces; LM2903DMR2G: 29,200 pieces) provide secondary sourcing options with comparable availability.

Q7: Is moisture sensitivity level (MSL) important for my application?

A: Moisture Sensitivity Level (MSL) indicates component vulnerability to moisture absorption during storage and assembly. MSL 1 (Unlimited) components like LM2903PT, LM2903D, and LM193QT require no special moisture control and can be stored indefinitely at room conditions. MSL 3 (168 Hours) components like AP393 series require desiccant storage and have limited shelf life after package opening. For high-reliability, automated assembly, or extended storage requirements, specify MSL 1 components.

Q8: Can I use AP393AM8G-13 (CMOS/TTL output) instead of Open-Collector output?

A: AP393AM8G-13 supports multiple output types including Open-Collector, making it functionally compatible. However, verify your circuit design does not depend on exclusive Open-Collector characteristics (such as wired-OR logic or pull-up resistor configuration). For applications requiring guaranteed Open-Collector operation, select AP393SG-13 (Open-Collector only) or LM2903 series (Open-Collector, Rail-to-Rail).

Q9: What is the temperature derating impact between -55°C ~ 125°C (LM193 MDE) and -40°C ~ 125°C (LM2903 series)?

A: The LM193 MDE supports -55°C minimum operating temperature, while LM2903 series supports -40°C minimum. This 15°C difference is significant only for cryogenic or extreme cold-environment applications (aerospace, arctic operations). For standard industrial, automotive, and consumer applications operating above -40°C, LM2903 series substitutes provide equivalent performance. Verify your application's minimum operating temperature requirement before selecting a substitute.

Q10: Are there any pinout compatibility issues between die form and packaged equivalents?

A: Yes. The LM193 MDE is bare die form without standardized pinout. Packaged equivalents (8-SOIC, 8-TSSOP, 8-MSOP, 8-UFSON) follow industry-standard dual-comparator pinout conventions but require PCB redesign for package transition. Verify pinout compatibility with your specific die-bonding configuration before substitution. Consult manufacturer datasheets for detailed pin assignments and functional descriptions.

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