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HD74HC165
Parallel-load 8-bit Shift Register
REJ03D0581-0300 Rev.3.00
Jan 31, 2006
Description
This 8-bit serial shift register shifts data from QA to QH when clocked. Parallel inputs to each stage are enabled by a low level at the Shift/Load input. Also included is a gated clock input and a complementary output from the eighth bit.
Clocking is accomplished through a 2-input NOR gate permitting one input to be used as a clock inhibit function. Holding either of the clock inputs high inhibits clocking, and holding either clock input low with the Shift/Load input high enables the other clock input. Data transfer occurs on the positive going edge of the clock. Parallel loading is inhibited as long as the Shift/Load input is high.