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SN74BCT29843,pdf(9-Bit Bus-Int
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The SN74BCT29843 features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. It is particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers.
The nine latches are transparent D-type latches. When the latch-enable (LE) input is high, the Q outputs are complementary to the noninverting data (D) inputs.
A buffered output-enable (
) input can be used to place the nine outputs in either a normal logic state (high or low level) 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 pull-up components.
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