LM193JG Equivalent & Substitute Parts

Part Overview

The LM193JG is a dual differential comparator manufactured by Texas Instruments, designed for general-purpose comparison applications. This device features open-collector, rail-to-rail output configuration in an 8-CDIP through-hole package. The LM193JG operates across a wide supply voltage range (2V to 30V single supply, ±1V to ±15V dual supply) and maintains an active product status with full RoHS3 compliance.

Substitute parts are identified when equivalent functional performance can be achieved through alternative packaging formats, manufacturers, or enhanced electrical specifications while maintaining core operational compatibility. The following substitute parts share the same base product architecture (LM193/LM2903 series) and deliver equivalent dual-comparator functionality with open-collector output topology.

Key Parameters

Parameter	LM193JG Value	Unit	Substitution Relevance
Number of Elements	2	Comparators	Critical - must match
Output Type	Open-Collector, Rail-to-Rail	—	Critical - must match
Voltage Supply (Single)	2V ~ 30V	V	Critical - substitute must cover or exceed
Voltage Supply (Dual)	±1V ~ ±15V	V	Critical - substitute must cover or exceed
Input Offset Voltage (Max)	5mV @ 30V	mV	Performance - lower is better
Input Bias Current (Max)	0.1µA @ 5V	µA	Performance - lower is better
Output Current (Typ)	6mA @ 5V	mA	Performance - higher is better
Quiescent Current (Max)	1mA	mA	Performance - lower is better
Operating Temperature	-55°C ~ 125°C	°C	Application range - must match or exceed
Package Type	8-CDIP Through Hole	—	Form factor - determines board compatibility
RoHS Status	ROHS3 Compliant	—	Regulatory - must maintain compliance

Substitute Part Grouping Explanation

Substitute parts for the LM193JG are grouped by functional equivalence within the LM193/LM2903 dual-comparator family. Substitution validity is determined by the following criteria:

Critical Matching Parameters:

Dual-element comparator configuration (2 independent comparators per package)
Open-collector output topology with rail-to-rail capability
Supply voltage range that encompasses or exceeds the original specification (2V ~ 30V single, ±1V ~ ±15V dual)
RoHS3 compliance status

Performance Enhancement Parameters: Substitute parts may exhibit improved electrical characteristics including lower input offset voltage, reduced input bias current, or increased output current capacity. These enhancements do not compromise compatibility and typically improve circuit performance.

Package Substitution Categories:

Surface Mount Alternatives: LM193DR (8-SOP), LM193QT (8-UFSON), LM2903DGKR (8-MSOP), LM2903DT (8-SOIC), LM2903Q2T (8-DFN), LM2903WYDT (8-SOIC), LM293DR2G (8-SOIC), LM393ADT (8-SOIC), LM393D (8-SOIC), LM393DT (8-SOIC)
Through-Hole Equivalent: None provided in substitute list (LM193JG is the only through-hole option)

All substitute parts maintain the same functional behavior and electrical interface, differing primarily in physical form factor and manufacturing source.

Parameter Comparison

Part Number	Manufacturer	Package Type	Mount Type	Supply (Single)	Supply (Dual)	Vos Max (mV)	Ib Max (µA)	Io Typ (mA)	Iq Max (mA)	Temp Range (°C)
LM193JG	Texas Instruments	8-CDIP	Through Hole	2V~30V	±1V~±15V	5 @ 30V	0.1 @ 5V	6 @ 5V	1	-55 to 125
LM193DR	UMW	8-SOP	Surface Mount	2V~32V	±1V~±16V	5	0.25	16	1	-55 to 125
LM193QT	STMicroelectronics	8-UFSON	Surface Mount	2V~36V	±1V~±18V	—	—	—	2.5	—
LM2903DGKR	Rohm Semiconductor	8-MSOP	Surface Mount	2V~36V	±1V~±18V	7 @ 5V	0.25 @ 5V	16 @ 5V	2.5	-40 to 125
LM2903DT	STMicroelectronics	8-SOIC	Surface Mount	2V~36V	±1V~±18V	7 @ 5V	0.25 @ 5V	16 @ 5V	2.5	-40 to 125
LM2903Q2T	STMicroelectronics	8-DFN	Surface Mount	2V~36V	±1V~±18V	7 @ 5V	0.25 @ 5V	16 @ 5V	2.5	-40 to 125
LM2903WYDT	STMicroelectronics	8-SOIC	Surface Mount	2V~36V	±1V~±18V	7 @ 30V	0.25 @ 5V	20	2.5	-40 to 125
LM293DR2G	onsemi	8-SOIC	Surface Mount	2V~36V	±1V~±18V	5 @ 30V	0.25 @ 5V	16 @ 5V	2.5	-25 to 85
LM393ADT	STMicroelectronics	8-SOIC	Surface Mount	2V~36V	±1V~±18V	2 @ 30V	0.1 @ 5V	18 @ 5V	2.5	0 to 70
LM393D	STMicroelectronics	8-SOIC	Surface Mount	2V~36V	±1V~±18V	5 @ 30V	0.25 @ 5V	18 @ 5V	2.5	0 to 70
LM393DT	STMicroelectronics	8-SOIC	Surface Mount	2V~36V	±1V~±18V	5 @ 30V	0.25 @ 5V	18 @ 5V	2.5	0 to 70

Engineering Selection Recommendations

For Through-Hole PCB Designs: The LM193JG remains the only through-hole package option within the provided substitute list. No direct through-hole replacement is available. Board redesign to surface-mount technology is required to access substitute parts.

For Surface-Mount Designs with Extended Temperature Range (-55°C to 125°C): LM193DR (UMW, 8-SOP) and LM2903DGKR (Rohm Semiconductor, 8-MSOP) maintain the full -55°C to 125°C operating range. Both parts deliver enhanced output current (16mA typical) compared to the LM193JG (6mA typical) and support supply voltages up to 32V and 36V respectively.

For Standard Industrial Temperature Range (0°C to 70°C): LM393ADT, LM393D, and LM393DT (all STMicroelectronics, 8-SOIC) provide the lowest input offset voltage specification (2mV @ 30V for LM393ADT) and highest output current capability (18mA typical). These parts are suitable for precision comparison applications within the 0°C to 70°C operating window.

For Automotive-Grade Applications: LM2903WYDT (STMicroelectronics, 8-SOIC) carries AEC-Q100 qualification and automotive-grade designation. This part operates across -40°C to 125°C with 20mA typical output current and is suitable for automotive comparator applications.

For Constrained Temperature Range (-25°C to 85°C): LM293DR2G (onsemi, 8-SOIC) operates within this narrower range and provides open-collector/open-drain output topology with 16mA typical output current.

All substitute parts maintain RoHS3 compliance and EAR99 export classification consistent with the original LM193JG.

Frequently Asked Questions (FAQ)

Q: Can the LM193JG be directly replaced with a surface-mount substitute on a through-hole PCB?

A: No. The LM193JG uses an 8-CDIP through-hole package. All substitute parts listed are surface-mount devices (8-SOP, 8-SOIC, 8-MSOP, 8-DFN, 8-UFSON). PCB redesign or adapter solutions are required for substitution.

Q: Which substitute part offers the best performance improvement over the LM193JG?

A: LM393ADT provides the lowest input offset voltage (2mV @ 30V versus 5mV @ 30V) and highest output current (18mA @ 5V versus 6mA @ 5V). However, its operating temperature range is limited to 0°C to 70°C, which may not suit all applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status, maintaining regulatory equivalence with the LM193JG.

Q: What is the key difference between LM2903 and LM393 variants?

A: Both are dual-comparator architectures within the same family. LM393 variants typically offer lower input offset voltage and higher output current. LM2903 variants support extended supply voltage ranges (up to ±18V dual supply versus ±15V for LM193JG) and higher quiescent current specifications.

Q: Can I use LM293DR2G in applications requiring -55°C operation?

A: No. LM293DR2G operates from -25°C to 85°C. For extended low-temperature operation down to -55°C, use LM193DR or LM2903DGKR.

Q: Is the LM2903WYDT suitable for automotive applications?

A: Yes. LM2903WYDT carries AEC-Q100 qualification and automotive-grade designation, making it suitable for automotive comparator applications across -40°C to 125°C.

Q: What is the primary advantage of LM193QT (8-UFSON package)?

A: The 8-UFSON (2x2mm) package provides the smallest form factor among substitute parts, enabling high-density PCB layouts. However, limited electrical parameter data is provided in the specification.

Q: Do all substitute parts support the same supply voltage range as the LM193JG?

A: No. The LM193JG supports 2V to 30V single supply and ±1V to ±15V dual supply. Most substitute parts extend this to 2V to 36V single supply and ±1V to ±18V dual supply, providing broader compatibility. LM293DR2G is limited to -25°C to 85°C operation.

Q: Which substitute part has the lowest quiescent current?

A: LM193DR and LM193JG both specify 1mA maximum quiescent current. All other substitute parts specify 2.5mA maximum, representing a 2.5x increase in standby power consumption.

Q: Can substitute parts be mixed within a single design?

A: Yes, provided the application circuit accommodates the electrical parameter variations listed in the Parameter Comparison table. Verify that supply voltage ranges, temperature operating windows, and output current requirements align with circuit design specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message