This part is a kind of semiconductor called 74LS137.

Function of this product has 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS WITH ADDRESS LATCHES.

Manufacturers : Motorola

Image and pinout :

Some of the text within the PDF file :

SN54/74LS137 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS WITH ADDRESS LATCHES 3-LINE TO 8-LINE DECODERS/ DEMULTIPLEXERS WITH ADDRESS LATCHES DATA OUTPUTS VCC 16 Y0 15 Y0 A B C GL G2 G1 Y1 14 Y1 Y2 13 Y2 Y3 12 Y3 Y4 11 Y4 Y5 10 Y5 Y6 Y7 16 1 LOW POWER SCHOTTKY Y6 9 J SUFFIX CERAMIC CASE 620-09 1 A 2 B SELECT 3 C 4 GL 5 G2 ENABLE 6 G1 7 8 Y7 GND OUTPUT 16 1 N SUFFIX PLASTIC CASE 648-08 16 1 D SUFFIX SOIC CASE 751B-03 ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current High Output Current Low Parameter 54 74 54 74 54, 74 54 74 Min 4.5 4.75 – 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70 – 0.4 4.0 8.0 Unit V °C mA mA FAST AND LS TTL [ ... ]

74LS137 PDF Datasheet Download