Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Channels | 4 comparators |
| Supply Class | 30-V-class legacy LM2901 operation |
| Output | Open-collector outputs |
| Common Mode | Includes ground for single-supply sensing |
| Temperature | −40°C to +125°C |
| Use | Industrial threshold/alarm monitoring |
| Package | SOIC (D), 14 pins |
| Packing | 2500-piece large tape and reel; marking LM2901 |
Product Overview
LM2901DR is the industrial-temperature quad version of the classic LM339-style comparator architecture. It combines four open-collector comparators with a −40°C to +125°C operating range suitable for industrial power, motor and automation electronics.
Compared with LM239DR, the key procurement value is temperature grade. Compared with LM2901B, this exact legacy LM2901 order code should be evaluated with its own older offset, bias and propagation specifications rather than the improved B-version limits.
The DR suffix is active SOIC-14 large-reel packaging and remains common in mature industrial designs.
For related devices, see HKEQGOO’s Comparators category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | LM2901DR |
| Channels | 4 comparators |
| Supply Class | 30-V-class legacy LM2901 operation |
| Output | Open-collector outputs |
| Common Mode | Includes ground for single-supply sensing |
| Temperature | −40°C to +125°C |
| Use | Industrial threshold/alarm monitoring |
| Package | SOIC (D), 14 pins |
| Packing | 2500-piece large tape and reel; marking LM2901 |
| Manufacturer Status | Active / Production |
| Part Marking | LM2901 |
Functional Highlights
Industrial temperature range expands environmental margin
The part covers cold-start and hot-enclosure conditions outside the LM239 range without changing the basic quad open-collector architecture.
Open-collector outputs interface naturally to supervisory logic rails
A pull-up can translate the comparator output to a lower MCU/logic voltage while the analog section uses a higher supply.
Design Considerations
- Use the legacy LM2901 electrical limits for exact replacement qualification.
- Choose pull-up current so VOL remains valid while rise time still meets system timing.
- Check input common-mode range near the positive rail; ground inclusion does not imply rail-to-rail inputs.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists LM2901DR as Active / Production; SOIC (D), 14 pins; 2500-piece large tape and reel; −40°C to +125°C; marking LM2901.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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