MM54HC597/MM74HC5978-Bit Shift Registers with Input LatchesGeneral Des criptionThis high speed shift register utilizes advanced silicon-gateCMOS technology. It has the high noise immunity and lowpower consumption of standard CMOS integrated circuits,as well as the ability to drive 10 LS-TTL loads.The 'HC597 comes in a 16-pin package and consists of an8-bit storage latch feeding a parallel-in, serial-out 8-bit shiftregister. Both the storage register and shift register havepositive-edge triggered clocks. The shift register also hasdirect load (from storage) and clear inputs.The 54HC/74HC logic family is speed, function, and pin-outcompatible with the standard 54LS/74LS logic family. Allinputs are protected from damage due to static discharge byinternal diode clamps to VCC and ground.FeaturesY 8-bit parallel storage register inputsY Wide operating voltage range: 2V±6VY Shift register has direct overriding load and clearY Guaranteed shift frequency . . . DC to 30 MHzY Low quiescent current: 80 mA maximum
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