LM2903BQDDFRQ1

LM2903BQDDFRQ1 is TI’s LM2903 dual low-power voltage comparator in a RoHS-compliant package variant (BQDDFRQ1). It contains two independent comparators with open-collector outputs. Key features: supply 2–36 V, input common-mode range includes ground, and operating temperature from -40°C to 125°C. Outputs are open-collector, so they sink current only and require pull-up resistors to Vcc; this allows wired-OR connections and simple level shifting.
Common uses: threshold sensing, zero-cross detectors, window detectors, and battery-monitoring circuits.
How to use: connect Vcc and GND, feed signals into the + and − inputs of each comparator, and place a pull-up resistor from each output to Vcc. The output sinks to ground when V+ > V−; otherwise the output is pulled high. Keep inputs within the specified common-mode range and respect the supply limits.
For exact pinout, package options, and detailed electrical specs, refer to the TI datasheet for LM2903BQDDFRQ1.

LM2903BQDDFRQ1 is a dual, single-supply, open-collector comparator. Direct equivalents: TI LM393 (and LM393Q1) and other LM393-family parts (pin-compatible variants). Other close equivalents: ON Semiconductor MC33072 and STMicroelectronics TS3702 (dual comparators). Always verify pinout and input common-mode range for your package, as there can be packaging and spec differences.

Here are the key features of LM2903BQDDFRQ1:
- Dual, independent voltage comparators
- Open-collector outputs (pull-ups required)
- Input common-mode range includes ground
- Wide supply voltage range (suitable for single-supply operation)
- Can operate over a broad temperature range (industrial/high temp variants)
- Low power consumption
- Available in RoHS-compliant packaging options
- Robust performance suitable for level shifting, zero/threshold detection, and general comparator applications
Note: Exact electrical specs (e.g., Vcc range, output sink current, input offset) vary by revision and package; consult the datasheet for precise numbers.

Pin count: 8 pins.
Function: Dual voltage comparator with open-collector outputs (two independent comparators; outputs require pull-up resistors).

- Manufacturer: Texas Instruments (TI).
- What kind of company: TI is a global American semiconductor company that designs and manufactures analog and embedded processing integrated circuits, sensors, and related products, headquartered in Dallas, Texas.

LM2903BQDDFRQ1 is a dual low‑power voltage comparator with open-collector outputs. Typical applications include:
- Power-supply and battery monitoring (under/over-voltage detection)
- Zero-cross/line detection for AC control (triac/relay drive)
- Window comparators and threshold detectors for alarms and safety circuits
- Thermostat and environmental sensing (temperature thresholds)
- Motor control and speed sensing (PWM feedback)
- Interface circuits to microcontrollers (logic signaling via pull-up resistors)
- General-purpose, low-power voltage comparison in monitoring and control circuits

An 8-pin Small-Outline package (SOIC-8), RoHS/Pb-free, on a tape-and-reel.