SN54F534A

These 8-bit flip-flops feature 3-state outputs SN54F534A designed specifically for driving highly capacitive or relatively low-impedance loads. SN54F534A is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The eight flip-flops of the 4F534A are edge-triggered D-type flip-flops. On the positive transition of the clock, the Q outputs are set to the complement of the logic states that were set up at the data (D) inputs. The 4F534A is equivalent to the 4F374 except for having inverted outputs.

A buffered output enable (OE ) control input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or a 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 need for interface or pullup components.

The output enable (OE) does not affect the internal operations of the flip-flops. Old data of SN54F534A can be retained or new data can be entered while the outputs are off.

The SN54F534A is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74F534A is characterized for operation from 0°C to 70°C.