LM393 is Low Power Offset Voltage Dual Comparator.
Part number : LM393
Functions : Dual Differential Comparator
Package information : DIP 8 Pin, SO 8 Pin Type
Manufacturer : Motorola, TI, Fairchild
Image
Description
The LM393 consists of two independent voltage comparators. These were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply curr ent drain is independent of the magnitude of the power supply voltage. The outputs can be connected to other open-collector outputs to achieve wired-AND relationships
Functions :
1. Wide supply voltage range
2. Low supply current drain independent of supply woltage
3. Low input biasing current
4. Low input offset current
5. Low input offset voltage
6. Input common-mode voltage range includes GND
7. Differential input voltage range equal to the power supply voltage
8. Low output saturation voltage
9. Output voltage compatible with TTL, MOS and CMOS logic
Pinout
Reference Site
http://www.learningaboutelectronics.com/Articles/LM393-comparator-circuit.php
LM393 Datasheet PDF
Other data sheets within the file : LM393A, LM293, LM2903
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