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The ’HC534, ’HCT534, ’HC564, and ’HCT564 are high speed Octal D-Type Flip-Flops manufactured with silicon gate CMOS technology. They possess the low power consumpTIon of stan-dard CMOS integrated circuits, as well as the ability to drive 15 LSTTL loads. Due to the large output drive capability and the three-state feature, these devices are ideally suited for interfacing with bus lines in a bus organized system. The two types are funcTIonally idenTIcal and differ only in their pinout arrangements.
The ’HC534, ’HCT534, ’HC564, and ’HCT564 are posiTIve edge triggered flip-flops. Data at the D inputs, meeting the setup and hold time requirements, are inverted and trans-ferred to the Q outputs on the positive going transition of the CLOCK input.
