MC74HC589A_14 Datasheet, PDF (8/12 Pages) ON Semiconductor – 8-Bit Serial or Parallel-Input/Serial-Output Shift Register with 3-State Output

MC74HC589A
SHIFT CLOCK
SERIAL DATA
INPUT, S_A
OUTPUT
ENABLE
SERIAL SHIFT/
PARALLEL LOAD
LATCH CLOCK
AL
H
BL
L
L
L
L
L
CL
H
PARALLEL ^{D L}
L
DATA
INPUTS
EL
H
FL
H
GL
L
L
L
L
L
L
H
L
H
L
L
HL
H
H
H
Q_H
ÉÉÉÉ HIGH IMPEDANCE
H
ÉÉÉÉ _{SERIAL SHIFT}
L H HL
SERIAL SHIFT
H
L
HL
H LL L
SERIAL SHIFT
H
L HH
SERIAL
SHIFT
RESET LOAD
LATCH LATCH
AND
SHIFT RE-
GISTER
PARALLEL
LOAD
SHIFT RE-
GISTER
LOAD
LATCH
PARALLEL
LOAD
SHIFT RE-
GISTER
PARALLEL LOAD,
LATCH, AND
SHIFT REGISTER
Figure 11. Timing Diagram
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