SCLS199B - MARCH 1993 - REVISED APRIL 1996
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These octal edge-triggered D-type flip-flops are designed for2.7-V to 5.5-V VCC operation.
The 'LV574 feature 3-state outputs designed specifically fordriving highly capacitive or relatively low-impedance loads. Thisdevice is particularly suitable for implementing buffer registers,I/O ports, bidirectional bus drivers, and working registers.
On the positive transition of the clock (CLK) input, the Q outputsare set to the logic levels set up at the data (D) inputs.
A buffered output-enable (
) input can be used to place the eight outputs in eithera normal logic state (high or low logic levels) or high-impedancestate. In the high-impedance state, the outputs neither load nordrive the bus lines significantly. The high-impedance state andincreased drive provide the capability to drive bus lines withoutneed for interface or pullup components.
does not affectthe internal operations of the flip-flops. Old data can be retainedor new data can be entered while the outputs are in thehigh-impedance state.
The SN74LV574 is available in TI's shrink small-outline package(DB), which provides the same I/O pin count and functionality ofstandard small-outline packages in less than half theprinted-circuit-board area.
The SN54LV574 is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. The SN74LV574is characterized for operation from -40°C to 85°C.
View more information about generic part numbers:SN74LV574
Go to the Engineering Design Center to locate information on other TI Semiconductor devices.