●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. When a high logic level is applied to the OUT-PUT ENABLE input, all outputs go to a high impedance state, regardless of what signals are present at the other inputs and the state of the storage elements.
●The HCT logic family is speed, function, and pin compatible with the standard LS logic family.
● Buffered Inputs
● Common Three-State Output-Enable Control
● Three-State Outputs
● Bus Line Driving Capability
● Typical Propagation Delay = 13ns at VCC = 5V, CL = 15pF, TA = 25°C (Clock to Output)
● Fanout (Over Temperature Range)
● Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
● Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
● Wide Operating Temperature Range . . . -55°C to 125°C
● Balanced Propagation Delay and Transition Times
● Significant Power Reduction Compared to LSTTL Logic ICs
● HC Types
● 2V to 6V Operation
● High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
● HCT Types
● 4.5V to 5.5V Operation
● Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
● CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
