The 74AC574 • 74ACT574 is an octal D-type flip-flop with 3-STATE outputs. It features high speed, low power consumption, and inputs and outputs on opposite sides of the package.
The 74AC574/74ACT574 are high‑speed, low‑power octal D‑type flip‑flops with a buffered common clock (CP) and a buffered output‑enable (OE). Each flip‑flop stores data on the low‑to‑high clock transition, and the outputs become high‑impedance when OE is high, making them suitable for bus‑oriented applications.
The device is offered in several JEDEC‑standard packages (SOIC, SOP, TSSOP, PDIP) and supports a supply voltage range from –0.5 V to +7 V. Key electrical characteristics include 24 mA source/sink capability per output, typical propagation delays of a few nanoseconds, and a maximum clock frequency up to 100 MHz depending on the variant.
| Output current (source/sink) | 24 mA |
|---|---|
| Maximum clock frequency | 100 MHz (typical) |
| Propagation delay (typical) | 3.3 ns to 35 ns |
| Available packages | SOIC, SOP, TSSOP, PDIP (20‑lead) |
Each output can source or sink up to 24 mA.
The parts are available in 20‑lead SOIC, SOP, TSSOP, and PDIP packages.
Typical propagation delays range from about 3.3 ns to 35 ns depending on conditions.