Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Channels | 4 comparators |
| Output | Open-collector outputs |
| Common Mode | Input range includes ground in single-supply applications |
| Supply | Wide-voltage standard comparator family |
| Use | Four-channel threshold, window, alarm and zero-crossing banks |
| Temperature | −25°C to +85°C exact order-code range |
| Package | SOIC (D), 14 pins |
| Packing | 2500-piece large tape and reel; marking LM239 |
Product Overview
LM239DR integrates four independent standard comparators in one SOIC-14, useful when several rails, sensors or thresholds must be supervised on one board. All four channels share supplies but retain separate open-collector outputs.
Open-collector outputs allow different pull-up logic voltage or wired alarm combination, at the cost of an external resistor and rise-time dependence on capacitance.
The exact LM239 temperature range is narrower than LM2901 industrial variants. That temperature-grade difference is more important than generic family similarity when selecting a production substitute.
For related devices, see HKEQGOO’s Comparators category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | LM239DR |
| Channels | 4 comparators |
| Output | Open-collector outputs |
| Common Mode | Input range includes ground in single-supply applications |
| Supply | Wide-voltage standard comparator family |
| Use | Four-channel threshold, window, alarm and zero-crossing banks |
| Temperature | −25°C to +85°C exact order-code range |
| Package | SOIC (D), 14 pins |
| Packing | 2500-piece large tape and reel; marking LM239 |
| Manufacturer Status | Active / Production |
| Part Marking | LM239 |
Functional Highlights
Four channels reduce BOM for multi-threshold systems
Rail monitors, heater controls and simple window detectors can be implemented with one package instead of multiple single/dual comparators.
Open collectors can share an alarm line
Several comparator outputs may be wire-ORed when the system only needs a common fault indication.
Design Considerations
- Size pull-ups for worst-case bus capacitance if outputs are wire-combined.
- Do not copy B-version offset/propagation figures onto the legacy LM239.
- Check the −25°C lower limit against the product environmental requirement.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists LM239DR as Active / Production; SOIC (D), 14 pins; 2500-piece large tape and reel; −25°C to +85°C; marking LM239.
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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