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KA393D
onsemi
IC COMPARATOR 2 GEN PUR 8SOIC
2735 Pcs New Original In Stock
Comparator General Purpose 8-SOIC
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(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (279 Ratings)
KA393D
Product Overview
7754687
DiGi Electronics Part Number
KA393D-DGManufacturer
onsemi
KA393D
Description
IC COMPARATOR 2 GEN PUR 8SOICInventory
2735 Pcs New Original In Stock
Comparator General Purpose 8-SOIC
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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KA393D Technical Specifications
Category
Linear, Comparators
Packaging
-
Series
-
Product Status
Obsolete
Type
General Purpose
Number of Elements
2
Output Type
-
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
CMRR, PSRR (Typ)
-
Propagation Delay (Max)
-
Hysteresis
-
Operating Temperature
0°C ~ 70°C
Package / Case
8-SOIC (0.154", 3.90mm Width)
Mounting Type
Surface Mount
Supplier Device Package
8-SOIC
Base Product Number
KA393
Datasheet & Documents
Datasheets
Download KA393D Product Specification (PDF)
HTML Datasheet
KA393D-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
8,100
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Ich bin begeistert von der schnellen Versandabwicklung und dem freundlichen Supportteam. Sehr professionell.
December 02, 2025
Excellent packaging that kept everything safe during transit, and delivery was swift.
December 02, 2025
I trust DiGi Electronics for long-lasting, quality solutions.
December 02, 2025
Whenever I reach out with questions, their staff responds with expertise and courtesy.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the KA393D in a new project given its obsolete status from onsemi?
Designing the KA393D into a new project carries significant supply chain and lifecycle risks due to its obsolete status. While 2700 units are currently available as new original stock, long-term availability is not guaranteed, which could jeopardize future production or repair cycles. Engineers should consider this part only for short-run production, legacy system repairs, or when actively planning a drop-in replacement path. For new designs, evaluate recommended substitutes like the LM393ADE4 or LM293DT early in the design phase to mitigate obsolescence risk and ensure ongoing availability with similar performance characteristics.
How does the KA393D compare to the LM393ADE4 in terms of input offset voltage and quiescent current for low-power sensor applications?
The KA393D and LM393ADE4 both specify a maximum input offset voltage of 5mV at 5V, making them comparable in precision for general-purpose comparisons. However, the KA393D has a maximum quiescent current of 2.5mA, whereas the LM393ADE4 typically consumes less—closer to 1.1mA—making it a better choice for battery-powered or low-power sensor applications. While the KA393D performs similarly in offset accuracy, its higher power draw may limit its use in energy-sensitive designs. If power is a constraint, prefer the LM393ADE4, especially in always-on systems.
Can the KA393D replace the BA2903YF-CE2 in a dual-comparator circuit operating from a 3.3V single supply?
The KA393D can generally replace the BA2903YF-CE2 in a 3.3V single-supply application since both comparators support operation down to 2V. However, ensure output compatibility: the KA393D uses an open-collector output that requires a pull-up resistor, just like the BA2903YF-CE2. Additionally, verify signal timing—while propagation delay isn't specified for the KA393D, practical performance may lag behind newer parts under light loads. Use worst-case design margins and simulate response time under actual load conditions to avoid timing errors in high-speed sensing applications.
What reliability concerns should be considered when using the KA393D in industrial environments near its 70°C maximum operating temperature?
Operating the KA393D near its 70°C upper limit—especially in sealed or high-ambient industrial enclosures—poses reliability risks. Without a specified temperature drift for offset voltage or bias current, performance stability under thermal stress is uncertain. Derating the operating temperature to 55°C or lower improves long-term function, and adding local airflow or thermal relief to the PCB can help. Also, consider that the obsolescence of the KA393D means replacement parts may not be available for field repairs, so design with failure modes in mind or plan system-level upgrades using modern alternatives like the LM293AD.
What PCB layout and power supply filtering best practices should be followed when integrating the KA393D in a noisy automotive sensor interface?
When using the KA393D in noisy environments like automotive sensor interfaces, implement local bypassing with a 100nF ceramic capacitor placed as close as possible to the V+ and GND pins to suppress high-frequency noise. Since the KA393D lacks specified PSRR, it's especially vulnerable to supply ripple. Use a clean, regulated rail—even if operating within the 2V to 36V range—and shield sensitive input traces with ground guarding to reduce crosstalk. Given its general-purpose design and lack of hysteresis, consider adding external hysteresis via positive feedback to prevent oscillation on slowly varying or noisy input signals in automotive applications.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
KA393D CAD Models
onsemi KA393D PCB symbols & footprints
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