This part is a kind of semiconductor called LM361.

Function of this product has High Speed Differential Comparators.

Manufacturers : National Semiconductor

Image and pinout :

Some of the text within the PDF file :

LM161/LM261/LM361 High Speed Differential Comparators May 1999 LM161/LM261/LM361 High Speed Differential Comparators General Description The LM161/LM261/LM361 is a very high speed differential input, complementary TTL output voltage comparator with improved characteristics over the SE529/NE529 for which it is a pin-for-pin replacement. The device has been optimized for greater speed performance and lower input offset voltage. Typically delay varies only 3 ns for over-drive variations of 5 mV to 500 mV. It may be operated from op amp supplies ( ± 15V). Complementary outputs having maximum skew are provided. Applications involve high speed analog to digital converters and zero-crossing detectors in disk file systems. Features n n n n n n n n Independent strobes Guaranteed high speed: 20 [ ... ]

LM361 PDF Datasheet Download