National Semiconductor LMC7221 User Guide
Summary
Discover this micropower CMOS comparator, an ideal solution for space-constrained electronics requiring rail-to-rail input and open drain output. Designed for challenging mixed voltage systems, it is perfect for mobile communications, battery-powered devices (PDAs, notebooks), and diverse alarm circuits. The accompanying manual provides comprehensive technical specifications across multiple packages, detailed connection diagrams, and ordering information needed to integrate this tiny, high-performance component into your design.
Manual Details
| Brand | National |
|---|---|
| Pages | 13 |
| File Size | 695.93 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
What is the best package for space-critical designs?
The LMC7221AI/LMC7221BI is available in the tiny SOT23-5 package.
Can this comparator handle mixed battery voltages?
Yes, its open drain output can be pulled up with a resistor to support mixed voltage battery powered products.
What are the operating voltage requirements for the LMC7221AI?
The supply voltage (V+) must be between 2.7V and 15V at room temperature.
How does the open drain output function in a system?
It can be pulled up with an external resistor to a voltage higher or lower than the supply.