onsemi (Ansemi)

SOIC-20-300mil

Tube

38

The high-performance silicon-gate CMOS MC74HC574A has the same pin-out as the LS574. The device inputs are compatible with standard CMOS outputs; pull-up resistors are included for compatibility with LSTTL outputs. Data that meets the setup time requirements is clocked to the output with the rising edge of the clock. The output-enable input does not affect the state of the flip-flops, but all device outputs are forced to a high-impedance state when output-enable is high. Therefore, data can be stored even if the output is not enabled. The HC574A has the same functionality as the HCT374A, but has a trigger input on the opposite side of the encapsulation output, simplifying PC motherboard layout.