This part is a kind of semiconductor called 74LS138.

Function of this product has SN74LS138 / IN74LS138.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

SN74LS138 1-of-8 Decoder/ Demultiplexer The LSTTL / MSI SN74LS138 is a high speed 1-of-8 Decoder / Demultiplexer. This device is ideally suited for high speed bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1-of-24 decoder using just three LS138 devices or to a 1-of-32 decoder using four LS138s and one inverter. The LS138 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all ON Semiconductor TTL families. • Demultiplexing Capability • Multiple Input Enable for Easy Expansion • Typical Power Dissipation of 32 mW • Active Low Mutually Exclusive Outputs • Input Clamp Diodes Limit High Speed Termination Effects GUARANTEED OPERATING RANGES Symbol VCC TA IOH I [ ... ]

74LS138 PDF Datasheet Download