The SN74LS279AN is an integrated circuit (IC) manufactured by Texas Instruments. It is a S-R Latch 4 Channel 1:1 IC Standard 16-PDIP, meaning it is made up of four independent S-R latch circuits, each of which has two external inputs, one being the set (S) input and the other being the reset (R) input, and one output, the Q output. When either the set or reset input is high, the corresponding output is the inverse of the other's input, while any other combination of inputs results in no change in the respective output. This IC is available in a 16-Pin Plastic Dual-Inline Package (PDIP) with dimensions of 0.300 x 0.620 in (7,62 x 15,75 mm). It is functioning with a power supply voltage of 4.75V to 5.25V and a maximum propagation delay of 31 ns at 5V.