KA393DTF Equivalent & Substitute Parts

Part Overview

The KA393DTF is a dual general-purpose comparator IC manufactured by onsemi in 8-SOIC surface-mount packaging. This device operates across a wide supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) and is designed for general-purpose comparison applications. The KA393DTF is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute parts maintain functional compatibility while offering improved availability and active product status.

Key Parameters

Parameter	Value
Number of Elements	2
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	5mV @ 5V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	18mA @ 5V
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the KA393DTF is determined by the following critical parameters:

Electrical Compatibility Requirements:

Dual comparator configuration (2 elements)
Supply voltage range: 2V ~ 36V single supply, ±1V ~ 18V dual supply
Input offset voltage maximum: 5mV @ 5V or better
Input bias current maximum: 0.25µA @ 5V
Output current capability: minimum 16mA @ 5V
Quiescent current maximum: 2.5mA
Operating temperature range: minimum 0°C ~ 70°C

Mechanical Compatibility Requirements:

8-SOIC package (0.154", 3.90mm width) for direct pin-compatible substitution
Surface-mount technology
MSL rating 1 (Unlimited)

Regulatory Compliance:

ROHS3 compliant
REACH unaffected status

Substitute parts are grouped into two categories: direct electrical equivalents (LM393DR2G, LM393EDR2G) and functionally compatible alternatives with extended temperature ranges or enhanced output specifications (LM2903DR2G, LM2903VDR2G, LM293DR2G, NCV2903DR2G, LM393DR, BA10393F-E2, BA2903SF-E2, BA2903YF-CE2).

Parameter Comparison

Part Number	Manufacturer	Product Status	Supply Voltage	Input Offset (Max)	Output Type	Operating Temp	Output Current (Typ)	Quiescent Current (Max)	Package
KA393DTF	onsemi	Obsolete	2V~36V, ±1V~18V	5mV @ 5V	—	0°C ~ 70°C	18mA @ 5V	2.5mA	8-SOIC
LM393DR2G	onsemi	Active	2V~36V, ±1V~18V	5mV @ 30V	Open-Collector, Rail-to-Rail	0°C ~ 70°C	16mA @ 5V	2.5mA	8-SOIC
LM393EDR2G	onsemi	Active	2V~36V, ±1V~18V	5mV @ 5V	—	0°C ~ 70°C	16mA @ 5V	1mA	8-SOIC
LM2903DR2G	onsemi	Active	2V~36V, ±1V~18V	7mV @ 30V	Open-Collector, Rail-to-Rail	-40°C ~ 105°C	16mA @ 5V	2.5mA	8-SOIC
LM2903VDR2G	onsemi	Active	2V~36V, ±1V~18V	7mV @ 30V	Open-Collector, Rail-to-Rail	-40°C ~ 125°C	16mA @ 5V	2.5mA	8-SOIC
LM293DR2G	onsemi	Active	2V~36V, ±1V~18V	5mV @ 30V	Open-Collector, Open-Drain, Rail-to-Rail	-25°C ~ 85°C	16mA @ 5V	2.5mA	8-SOIC
NCV2903DR2G	onsemi	Active	2V~36V, ±1V~18V	7mV @ 30V	CMOS, DTL, ECL, MOS, Open-Collector, TTL	-40°C ~ 125°C	16mA @ 5V	2.5mA	8-SOIC
LM393DR	Rohm Semiconductor	Not For New Designs	2V~36V, ±1V~18V	7mV @ 5V	Open-Collector, Rail-to-Rail	0°C ~ 70°C	6mA @ 5V	2.5mA	8-SOIC
BA10393F-E2	Rohm Semiconductor	Active	2V~36V, ±1V~18V	5mV @ 5V	Open-Collector	-40°C ~ 85°C	16mA @ 5V	1mA	8-SOP
BA2903SF-E2	Rohm Semiconductor	Active	2V~36V, ±1V~18V	7mV @ 5V	Open-Collector	-40°C ~ 105°C	16mA @ 5V	1mA	8-SOP
BA2903YF-CE2	Rohm Semiconductor	Active	2V~36V, ±1V~18V	4mV @ 5V	Open-Collector	-40°C ~ 125°C	16mA @ 5V	1mA	8-SOP

Engineering Selection Recommendations

Primary Substitutes (Direct Electrical Equivalents):

LM393DR2G and LM393EDR2G are the preferred direct substitutes for the KA393DTF. Both maintain identical supply voltage ranges, input offset specifications, and operating temperature windows. LM393EDR2G offers reduced quiescent current (1mA vs. 2.5mA), providing power efficiency benefits in battery-powered applications. Both are active products from onsemi with ROHS3 compliance and unlimited MSL ratings.

Extended Temperature Range Alternatives:

LM2903DR2G, LM2903VDR2G, and NCV2903DR2G extend the operating temperature range to -40°C ~ 105°C or -40°C ~ 125°C, suitable for industrial and automotive environments. NCV2903DR2G carries AEC-Q100 automotive qualification. These parts maintain electrical compatibility while offering enhanced thermal performance.

Cross-Manufacturer Alternatives:

LM293DR2G (onsemi) and BA10393F-E2, BA2903SF-E2, BA2903YF-CE2 (Rohm Semiconductor) provide functional equivalence with different output specifications. BA2903YF-CE2 features the lowest input offset voltage (4mV @ 5V) and automotive-grade qualification (AEC-Q100) with extended temperature range (-40°C ~ 125°C).

Package Consideration:

BA10393F-E2, BA2903SF-E2, and BA2903YF-CE2 use 8-SOP packaging (0.173", 4.40mm width) instead of 8-SOIC. While functionally compatible, these require PCB layout modification and are not pin-compatible drop-in replacements.

Status-Based Selection:

Avoid LM393DR (Rohm Semiconductor, "Not For New Designs" status) for new production. Prioritize active-status parts: LM393DR2G, LM393EDR2G, LM2903DR2G, LM2903VDR2G, LM293DR2G, NCV2903DR2G, and Rohm's BA-series comparators.

Frequently Asked Questions (FAQ)

Q: Can LM393DR2G directly replace KA393DTF without PCB modifications?

A: Yes. LM393DR2G is a pin-compatible 8-SOIC substitute with identical supply voltage range (2V~36V, ±1V~18V), input offset specification (5mV @ 30V), and operating temperature range (0°C~70°C). No PCB layout changes are required.

Q: What is the difference between LM393DR2G and LM393EDR2G?

A: Both are onsemi LM393 variants in 8-SOIC packaging with identical electrical specifications. LM393EDR2G has lower quiescent current (1mA vs. 2.5mA), reducing power consumption in standby conditions. Select LM393EDR2G for power-sensitive applications.

Q: Why do some substitutes have different operating temperature ranges?

A: Temperature range variations reflect different product grades and manufacturing processes. LM2903VDR2G (-40°C~125°C) and NCV2903DR2G (-40°C~125°C) are designed for extended industrial and automotive environments. Select based on your application's thermal requirements.

Q: Can I use BA2903YF-CE2 as a drop-in replacement?

A: BA2903YF-CE2 is functionally equivalent but uses 8-SOP packaging (0.173", 4.40mm width) instead of 8-SOIC (0.154", 3.90mm width). PCB footprint modification is required. It is not a direct drop-in replacement.

Q: What does "Not For New Designs" mean for LM393DR?

A: This status indicates the part is in mature/legacy phase and not recommended for new product development. Use active-status alternatives (LM393DR2G, LM393EDR2G) for new designs.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the KA393DTF's regulatory requirements.

Q: Which substitute offers the best input offset voltage specification?

A: BA2903YF-CE2 provides the lowest input offset voltage at 4mV @ 5V, compared to KA393DTF's 5mV @ 5V. This offers improved precision in comparison applications.

Q: Can I use NCV2903DR2G in automotive applications?

A: Yes. NCV2903DR2G carries AEC-Q100 automotive qualification and operates across -40°C~125°C, meeting automotive-grade requirements. It is suitable for automotive and harsh industrial environments.

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