TC74HC393AF(EL,F) Toshiba

TC74HC393AP/AF TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC393AP, TC74HC393AF Dual Binary Counter The TC74HC393A is a high speed CMOS 4-BIT BINARY 2 TC74HC393AP COUNTER fabricated with silicon gate C MOS technology. It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. It contains two independent counter circuits in one package, so that counting or frequency division of eight binary bits can be achieved with one IC. This device changes state on the negative going transition of the CK pulse. The counter can be reset to 0 (QA to QD = L) by a high at the CLR input regardless of other inputs. All inputs are equipped with protection circuits against static TC74HC393AF discharge or transient excess voltage. Features High speed: f = 72 MHz (typ.) at V = 5 V max CC Low power dissipation: I = 4 A (max) at Ta = 25C CC High noise immunity: V = V = 28% V (min) NIH NIL CC Output drive capability: 10 LSTTL loads Symmetrical output impedance: I = I = 4 mA (min) OH OL Weight Balanced propagation delays: t t pLH pHL DIP14-P-300-2.54 : 0.96 g (typ.) Wide operating voltage range: V (opr) = 2 to 6 V CC SOP14-P-300-1.27A : 0.18 g (typ.) Pin and function compatible with 74LS393 Pin Assignment Start of commercial production 1986-11 1 2014-03-01 TC74HC393AP/AF IEC Logic Symbol Truth Table Inputs Outputs CK CLR QA QB QC QD X H L L L L L Count Up L No Change X: Dont care Timing Chart System Diagram 2 2014-03-01