LM2901A-SR

LM2901A-SR is a quad voltage comparator in the LM2901 family with open-collector outputs. It compares four input pairs and gives a digital output per pair that sinks current when the non-inverting input is higher.
Key points:
- Low-power, single-supply operation from about 2 to 36 V.
- Input common-mode range includes ground; not rail-to-rail on the high side.
- Outputs are open-collector; require pull-up resistors to a logic level and can only sink current.
- Suitable for thresholding, level shifting, zero-cross detection, window detectors, and alarm circuits.
- Typical packaging variants include RoHS-compliant, surface-mount (SR) and other 14-pin forms.
Usage notes:
- Add pull-ups and decoupling capacitors; mind propagation delay and output current limits.
- Design inputs to stay within the common-mode range; consider adding hysteresis if noisy.
- Verify pinout for your package (A/B/C/D comparators with separate inputs and outputs).
If you need, I can include a simple schematic example showing one comparator in a single-supply threshold detector.

LM2901A-SR is a quad open-collector comparator. Closest equivalents:
- LM339 (quad comparator with open-collector outputs; pinouts differ)
- LM2901 family variants (LM2901, LM2901N, LM2901D, etc.)
- Other vendor cross-references of the LM2901 family (where available, e.g., NCV2901)
Note: check input common-mode range and pinout to ensure a drop-in replacement.

Key features of LM2901A-SR:
- Quad, independent differential voltage comparators (4 channels in one package)
- Open-collector outputs (requires external pull-up resistors; can be wired-OR)
- Input common-mode range includes ground; up to VCC − 1.5 V
- Wide supply range: 2 V to 36 V (single-supply operation)
- Low static power consumption (suitable for battery-powered apps)
- Industrial temperature range: −40°C to +125°C
- 14-pin small-outline/surface-mount package (SR variant)
- Fast response suitable for level shifting, window comparators, zero-cross detectors (no internal hysteresis)
Notes: Output sinking capability depends on pull-up and VCC; ensure proper pull-ups to the desired logic level.

- Pin count: 14 pins (14-pin package, e.g., SOIC-14/DIP-14).
- Function: Quad low-power voltage comparator with four independent channels; each channel compares two inputs and drives an open-collector output (requires pull-up resistors).

- Manufacturer: Texas Instruments (TI).
- What kind of company: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing ICs (one of the world’s largest semiconductor vendors).

LM2901A-SR is a low-power quad differential comparator with open-collector outputs for single-supply operation. Common applications:
- Threshold and level detection from sensors and transducers
- Window comparators and trip/limit detectors
- Zero-cross and peak detectors for AC signals
- PWM generation and control loops in switching regulators
- Battery and power-supply monitoring (undervoltage/overvoltage)
- Sensor interfacing to microcontrollers (open-collector, easy wired-OR)
- Alarm and protection circuits in industrial control
- Signal conditioning and relaxation/oscillator circuits

LM2901A-SR comes in a 14-pin Small-Outline IC package (SOIC-14).