SDFS028A - D2932, MARCH 1987 - REVISED OCTOBER 1993
These 8-bit flip-flops feature 3-state outputs designedspecifically for driving highly capacitive or relativelylow-impedance loads. They are particularly suitable for implementingbuffer registers, I/O ports, bidirectional bus drivers, and workingregisters.
The eight flip-flops of the ´F534A are edge-triggered D-typeflip-flops. On the positive transition of the clock, the Q\ outputsare set to the complement of the logic states that were set up at thedata (D) inputs. The ´F534A is equivalent to the ´F374except for having inverted outputs.
A buffered output enable (
) control input can be used to place the eight outputsin either a normal logic state (high or low logic levels) or ahigh-impedance state. In the high-impedance state, the outputsneither load nor drive the bus lines significantly. Thehigh-impedance state and increased drive provide the capability todrive bus lines without need for interface or pullup components.
The output enable ()does not affect the internal operations of the flip-flops. Old datacan be retained or new data can be entered while the outputs are off.
The SN54F534A is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. The SN74F534Ais characterized for operation from 0°C to 70°C.
View more information about generic part numbers:SN74F534A
Go to the Engineering Design Center to locate information on other TI Semiconductor devices.