SN54F374

These 8-bit flip-flops feature 3-state outputs of SN54F374 designed specifically for driving highly capacitive or relatively low-impedance loads. SN54F374 is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The eight flip-flops of the 4F374 are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels that were set up at the data (D) inputs.

A buffered output enable (OE) input of SN54F374 can be used to place the eight outputs in either a normal logic state (high or low) or a high-impedance state. In the high-impedance state, the outputs of SN54F374 neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without need for interface or pullup components.

The output enable (OE) input of SN54F374 does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

The SN74F374 is available in TI's shrink small-outline package (DB), which provides the same I/O pin count and  unctionality of standard small-outline packages in less than half the printed-circuit-board area.

The SN54F374 is characterized for operation over the full military temperature range of 55°C to 125°C. The N74F374 is characterized for operation from 0°C to 70°C.