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The 74LS37 is a Quad 2-Input NAND Buffer IC in a DIP-14 package, designed for TTL-compatible digital systems. It provides four NAND gates with buffered outputs, ideal for amplifying signals and driving higher load circuits in applications like microprocessors, control systems, and combinational logic circuits.
The 74LS31 is a Hex Delay Element IC with six independent delay circuits, designed for precise timing adjustments in digital signal applications. Its TTL compatibility and adjustable delays make it an excellent choice for use in synchronization, signal processing, and control systems.
The 7491 is an 8-bit shift register with serial input and serial output, featuring a gated input for precise control over data shifting. Ideal for use in serial-to-parallel conversion, data communication, and timing applications, this TTL-compatible IC offers reliable data processing with minimal delay.
FQA19N60 /19N60 600V N-Channel TO-3PIN MOSFET 
PC817 SMD / SOP Optocoupler 
74LS40 DIP Dual 4-Input Nand Buffer 
74LS37 DIP Quad 2-Input NAND Buffer 
