Item Specifications and Additional Information:
The 74LS series is a bipolar, low power schottky IC. The 74LS family is a lower power edition of the 74S series but has a somewhat higher speed but lower power from the original 74 series. At one time, these 74LS family of ICs were the most popular of the 74 series ICS.
These are a mix of manufacturers including TI, Philips, Motorola, Signetics, Harris, Toshiba and SGS.