The Texas Instruments SN74ACT534N is an 8-bit D-type flip-flop with tri-state inverted outputs, positive-edge triggered, in a 20-pin PDIP through-hole package. It belongs to the 74ACT family — advanced CMOS logic that runs on a 4.5V to 5.5V supply and delivers 24 mA source/sink per output. The inverted outputs simplify bus polarity matching in data latches, address registers, and status capture on a microprocessor bus. With a 100 MHz clock ceiling and 11.5 ns propagation delay at 5V, 50 pF, it keeps timing margins tight in synchronous designs.
The 100 MHz clock rating sets the maximum toggle rate for the flip-flop itself. The 11.5 ns propagation delay from clock to output at 5V, 50 pF load determines the available setup time for the next device on the bus.