These octal edge-triggered D-type flip-flops feature 3-state outputs designed specifically for bus driving. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
The eight flip-flops enter data on the low-to-high transition of the clock (CLK) input.
A buffered output-enable (OE)\ input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.
OE\ does not affect the internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.
|VCC (Min) (V)|
|VCC (Max) (V)|
|Voltage (Nom) (V)|
|F @ Nom Voltage (Max) (Mhz)|
|ICC @ Nom Voltage (Max) (mA)|
|tpd @ Nom Voltage (Max) (ns)|
|IOL (Max) (mA)|
|IOH (Max) (mA)|
|Operating Temperature Range (C)|
|Military||SN54HC574||QML certified for Military and Defense Applications|