Texas Instruments CD4093BE CD4093B Quad 2-Input NAND Schmitt Triggers DIP14 5 Pack Schmitt-trigger action on each input with no external components Hysteresis voltage typically 0.9 V at VDD= 5 V and 2.3 V at VDD= 10 V Noise immunity greater than 50% No limit on input rise and fall times Standardized, symmetrical output characteristics