Product Overview
Low-Power Dual Voltage Comparator with Open-Collector Output 2V–36V
Condition
Unused, New Old Stock (NOS). Visual inspection completed with no issues noted. Surface-mount SOIC-8 package with gull-wing leads. Sourced as part of our ongoing recovery from legacy electronics supply chains.
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Product Overview
National Semiconductor LM2903 is a low-power dual voltage comparator designed for reliable signal comparison in automotive and industrial systems. Each IC contains two independent comparators capable of operating from a wide 2.0V to 36V supply range, or ±1V to ±18V in split-supply configurations. With open-collector outputs, the LM2903 allows flexible interface to different logic levels through an external pull-up resistor.
Built for extended temperature environments, the 2903 series is commonly specified for -40°C to +125°C operation. The SOIC-8 surface-mount package makes it suitable for compact PCB layouts and modern assembly processes while maintaining compatibility with long-standing industry-standard comparator designs.
Key Features
- Dual independent voltage comparators
- Wide single-supply range: 2.0V to 36V
- Split-supply capability: ±1V to ±18V
- Open-collector outputs for flexible logic interfacing
- Low power consumption
- Common-mode input voltage includes ground
- Extended operating temperature range: -40°C to +125°C
- Industry-standard LM2903 architecture
- SOIC-8 surface-mount package
Applications
- Automotive sensor threshold detection
- Power supply monitoring and brownout detection
- Battery voltage supervision
- Industrial control signal comparison
- Zero-crossing detectors
- Level detection for analog sensors
- Microcontroller input conditioning with pull-up configuration
Frequently Asked Questions
Does this require a pull-up resistor?
Yes. The LM2903 features open-collector outputs, so an external pull-up resistor is required to produce a valid high logic level.
Can it operate from 5V logic supplies?
Yes. It operates from 2.0V to 36V, making it fully compatible with 5V systems and many other supply levels.
Is this suitable for automotive environments?
The LM2903 series is commonly specified for -40°C to +125°C operation, making it appropriate for many automotive and industrial applications.
Is this the same as LM393?
Functionally similar, but the LM2903 version is typically rated for extended temperature operation compared to standard commercial LM393 variants.
Has this unit been electrically tested?
Visual inspection completed with no issues noted. As unused stock, it has not been installed or electrically tested.
Quietly comparing voltages behind the scenes, the LM2903 has been the decision-maker in countless control boards. If your circuit needs a clean threshold and wide supply flexibility, this classic dual comparator is ready for the job.
