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KA2901DTF Equivalent & Substitute Parts
Part Overview
The KA2901DTF is a 4-channel general-purpose comparator manufactured by onsemi in 14-SOP surface mount packaging. This device features DTL, MOS, open-collector, and TTL output types with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The KA2901DTF is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | KA2901DTF |
| Manufacturer | onsemi |
| Category | Linear |
| Description | IC COMPARATOR 4 GEN PUR 14SOP |
| Number of Elements | 4 |
| Output Type | DTL, MOS, Open-Collector, TTL |
| Voltage - Supply, Single/Dual (±) | 2V ~ 36V, ±1V ~ 18V |
| Voltage - Input Offset (Max) | 7mV @ 5V |
| Current - Input Bias (Max) | 0.25µA @ 5V |
| Current - Output (Typ) | 18mA @ 5V |
| Current - Quiescent (Max) | 2.5mA |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the KA2901DTF is determined by the following critical parameters:
- Number of Elements: Must be 4 channels
- Output Type: Must support open-collector configuration
- Voltage Supply Range: Must accommodate 2V ~ 36V (single) or ±1V ~ ±18V (dual)
- Input Offset Voltage: Maximum 7mV @ 5V
- Input Bias Current: Maximum 0.25µA @ 5V
- Output Current: Minimum 16mA @ 5V
- Quiescent Current: Maximum 2.5mA
- Operating Temperature: Minimum -40°C to 85°C
- Package: 14-SOIC (0.154", 3.90mm Width) surface mount
- RoHS Compliance: ROHS3 Compliant
Substitute parts are grouped into three categories: active onsemi alternatives, active alternatives from other manufacturers, and automotive-grade upgrades from Texas Instruments.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Output Type | Supply Voltage | Input Offset (Max) | Output Current (Typ) | Operating Temp | Package |
|---|---|---|---|---|---|---|---|---|
| KA2901DTF | onsemi | Obsolete | DTL, MOS, Open-Collector, TTL | 2V ~ 36V, ±1V ~ 18V | 7mV @ 5V | 18mA @ 5V | -40°C ~ 85°C | 14-SOIC |
| LM239DR2G | onsemi | Active | CMOS, Open-Collector, TTL | 3V ~ 36V, ±1.5V ~ 18V | 5mV @ 5V | 16mA @ 5V | -25°C ~ 85°C | 14-SOIC |
| LM2901DR2G | onsemi | Active | CMOS, Open-Collector, TTL | 3V ~ 36V, ±1.5V ~ 18V | 7mV @ 5V | 16mA @ 5V | -40°C ~ 105°C | 14-SOIC |
| LM2901VDR2G | onsemi | Active | CMOS, Open-Collector, TTL | 3V ~ 36V, ±1.5V ~ 18V | 7mV @ 5V | 16mA @ 5V | -40°C ~ 125°C | 14-SOIC |
| LM339DR2G | onsemi | Active | CMOS, Open-Collector, TTL | 3V ~ 36V, ±1.5V ~ 18V | 5mV @ 5V | 16mA @ 5V | 0°C ~ 70°C | 14-SOIC |
| NCV2901DR2G | onsemi | Active | CMOS, Open-Collector, TTL | 3V ~ 36V, ±1.5V ~ 18V | 7mV @ 5V | 16mA @ 5V | -40°C ~ 125°C | 14-SOIC |
| LM2901QDRG4Q1 | Texas Instruments | Last Time Buy | Open-Collector | 2V ~ 36V, ±1V ~ 18V | 7mV @ 5V | 20mA | -40°C ~ 125°C | 14-SOIC |
| LM2901VQDRG4Q1 | Texas Instruments | Last Time Buy | Open-Collector | 2V ~ 36V, ±1V ~ 18V | 7mV @ 5V | 20mA | -40°C ~ 125°C | 14-SOIC |
| AS339AMTR-E1 | Diodes Incorporated | Active | Open-Collector | 2V ~ 36V, ±1V ~ 18V | 3mV @ 5V | 16mA @ 5V | -40°C ~ 85°C | 14-SOIC |
| AS339MTR-E1 | Diodes Incorporated | Active | Open-Collector | 2V ~ 36V, ±1V ~ 18V | 5mV @ 5V | 16mA @ 5V | -40°C ~ 85°C | 14-SOIC |
| BA2901SF-E2 | Rohm Semiconductor | Active | Open-Collector | 2V ~ 36V, ±1V ~ 18V | 7mV @ 5V | 16mA @ 5V | -40°C ~ 105°C | 14-SOIC |
Engineering Selection Recommendations
Primary Substitutes (onsemi Active Parts)
LM2901DR2G and LM2901VDR2G are direct functional replacements with extended operating temperature ranges (-40°C to 105°C and -40°C to 125°C respectively). Both maintain the 4-channel configuration, open-collector output, and equivalent electrical specifications. LM2901VDR2G offers the widest temperature range and is available in higher inventory quantities.
Alternative Manufacturers
AS339AMTR-E1 and AS339MTR-E1 from Diodes Incorporated provide active alternatives with identical supply voltage ranges and operating temperature coverage. Both are ROHS3 compliant with MSL rating of 1 or 3.
BA2901SF-E2 from Rohm Semiconductor is an active alternative with extended temperature range to 105°C and equivalent electrical performance.
Automotive-Grade Upgrades
LM2901QDRG4Q1 and LM2901VQDRG4Q1 from Texas Instruments are automotive-qualified (AEC-Q100) alternatives with Last Time Buy status. These parts maintain supply voltage compatibility with the original KA2901DTF and offer extended temperature operation to 125°C.
All substitute parts are ROHS3 compliant and carry MSL rating of 1 (unlimited moisture sensitivity).
Frequently Asked Questions (FAQ)
Q: Can LM2901DR2G directly replace KA2901DTF?
A: LM2901DR2G is functionally compatible. It maintains the 4-channel configuration, open-collector output, and equivalent electrical specifications. The minimum supply voltage increases from 2V to 3V for single supply operation. Operating temperature range extends to 105°C compared to the original 85°C maximum.
Q: What is the difference between LM2901DR2G and LM2901VDR2G?
A: Both are onsemi LM2901 variants in 14-SOIC packaging. LM2901VDR2G offers extended operating temperature range to 125°C and is available in higher inventory quantities. Electrical specifications are equivalent.
Q: Are the Texas Instruments LM2901QDRG4Q1 and LM2901VQDRG4Q1 suitable replacements?
A: Yes. Both maintain the original supply voltage range (2V ~ 36V, ±1V ~ ±18V) and equivalent electrical performance. Both are automotive-qualified (AEC-Q100) with extended temperature operation to 125°C. Status is Last Time Buy.
Q: What is the packaging difference between 14-SOIC and 14-SOP?
A: Both designations refer to 14-pin surface mount packages with 0.154" width (3.90mm). The KA2901DTF uses 14-SOP; substitute parts use 14-SOIC. These are mechanically and electrically compatible for PCB assembly.
Q: Which substitute offers the lowest input offset voltage?
A: AS339AMTR-E1 from Diodes Incorporated specifies 3mV @ 5V input offset voltage, lower than the original KA2901DTF specification of 7mV @ 5V.
Q: Are all substitutes ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant with MSL rating of 1 (unlimited) or MSL 3 (168 hours), as specified in the provided data.
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