TC74HC590AF(F) Toshiba

TC74HC590AP/AF TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC590AP, TC74HC590AF 8-Bit Binary Counter/Register with 3-State Outputs The TC74HC590A is a high speed CMOS 8-BIT 2 TC74HC590AP COUNTER/REGISTER fabricated with silicon gate C MOS technology. It achieves the high speed operation similar to epuivalent LSTTL while maintaining the CMOS low power dissipation. The internal counter counts on the positive going edge of Counter Clock (CCK) when Counter Clock Enable ( CCKEN ) is low. When Counter Clear ( CCLR ) is low, the internal counter is cleared asynchronously to the clock. Data in the internal counter are loaded into the register at positive going edge of Register Clock (RCK), and the register TC74HC590AF outputs are controlled by enable input ( G ). All inputs are equipped with protection circuits against static discharge or transient excess voltage. Features High speed: f = 62 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 Weight Output drive capability: 15 LSTTL loads for QA to QH DIP16-P-300-2.54A : 1.00 g (typ.) 10 LSTTL loads for RCO SOP16-P-300-1.27A : 0.18 g (typ.) Symmetrical output impedance: I = I = 6 mA (min) OH OL For QA to QH I = I = 4 mA (min) OH OL For RCO Balanced propagation delays: t t pLH pHL Wide operating voltage range: V (opr) = 2 to 6 V CC Pin and function compatible with 74LS590 Pin Assignment Start of commercial production 1988-05 1 2014-03-01 TC74HC590AP/AF IEC Logic Symbol Block Diagram Truth Table Inputs Function G RCK CCLR CCKEN CCK H X X X X Q Outputs Disable L X X X X Q Outputs Enable X X X X Counter Data is Stored into Register X X X X Register State is not Changed X X L X X Counter Clear X X H L Advance One Count X X H L No Count X X H H X No Count X: Dont care RCO = QA QB QC QD QE QF QG QH (QA to QH: internal outputs of the counter) 2 2014-03-01