LM2903ITLX/NOPB

LM2903ITLX/NOPB is TI’s RoHS (lead-free) version of the LM2903 dual voltage comparator in the ITLX 8-pin package. It contains two independent comparators with open-collector outputs (each output must be pulled up to a logic supply with a resistor).
Key points:
- Dual comparator with open-collector outputs (sinks current only)
- Wide supply range: 2 to 36 V
- Input common-mode includes ground
- Industrial temperature range (-40 to 125°C)
- 8-pin package in ITLX family; NOPB = lead-free
Usage basics:
- Power: Vcc to supply, GND to ground
- Each comparator has + and − inputs; output is pulled up externally
- Output logic: when V+ > V−, the output sinks (goes low); when V+ ≤ V−, the output is pulled high via the resistor
Applications: threshold detectors, zero-cross detectors, window comparators, level shifting, PWM control, etc.

LM2903ITLX/NOPB is a dual, open-collector voltage comparator. Equivalents include:
- LM393: identical dual comparator; same pinouts in common packages
- NJM2903: New Japan Radio dual comparator (pin-compatible)
- Other vendors’ LM393/LM2903 derivatives (e.g., ON Semiconductor, STMicroelectronics) that are pin-compatible
Note: check input common-mode range and output requirements for exact replacement.

Key features of LM2903ITLX/NOPB:
- Dual independent voltage comparators
- Open-collector outputs (need external pull-up)
- Input common-mode range includes ground; up to Vcc − 1.5 V
- Wide supply voltage: 2 V to 36 V
- Low-power operation suitable for battery-powered designs
- Temperature range: −40°C to 125°C (industrial)
- Outputs can be wired-OR; compatible with TTL/CMOS logic via pull-ups
- Pb-free, RoHS-compliant (NOPB); available in ITLX (surface-mount) package
- Applications: level shifting, zero-cross detectors, window/threshold detectors, sensing and monitoring circuits

- Pin count: 8 pins.
- Function: Dual low-power voltage comparator with open-collector outputs (two independent comparators; each has noninverting and inverting inputs; outputs sink current and require external pull-up).

- Manufacturer: Texas Instruments Incorporated (TI).
- What kind of company: TI is an American multinational corporation that designs and manufactures semiconductors and integrated circuits, especially analog and embedded processing products; one of the world’s largest semiconductor companies, headquartered in Dallas, Texas.

LM2903ITLX/NOPB is a dual, low‑power, open‑collector voltage comparator. Typical application areas include:
- DC voltage threshold detection: battery/power-supply monitoring, undervoltage/overvoltage protection, watchdogs
- AC sensing: zero-crossing and line-detection for control or metering
- Window detectors: two-threshold trip/limit alarms
- Level shifting/interface: driving microcontroller inputs from analog signals (with pull-ups)
- Timing/oscillation: simple monostable/astable circuits, PWM comparison
- Alarm/drive circuits: relay/LED driving using open-collector outputs
These cover general sensing, protection, and interface tasks in power, automotive, and industrial applications.

8-pin Small Outline Integrated Circuit (SOIC-8) package; RoHS-compliant (NOPB).