Texas Instruments CD4093BE CD4093B Quad 2-Input NAND Schmitt Triggers DIP14 5 Pack
The CD4093B consists of four Schmitt-trigger circuits. Each circuit functions as a two-input NAND gate with Schmitt-trigger action on both inputs. The gate switches at different points for positive- and negative-going signals. The difference between the positive voltage (VP) and the negative voltage (VN) is defined as hysteresis voltage (VH)