HD74AC164 Datasheet, PDF (3/10 Pages) Hitachi Semiconductor – Serial-In, Parallel-Out Shift Register

HD74AC164/HD74ACT164
Mode Select Table
Inputs
Outputs
Operating Mode
MR
A
B
Q₀
Q₁ to Q₇
Reset (Clear)
L
X
X
L
L to L
Shift
H:
L:
X:
q_n :
H
L
L
L
q₀ to q₆
H
L
H
L
q₀ to q₆
H
H
L
L
q₀ to q₆
H
H
H
H
q₀ to q₆
High Voltage Level
Low Voltage Level
Immaterial
Lower case letters indicate the state of the referenced input or output one setup time prior to the
Low-to-High clock transition.
Logic Diagram
A
B
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
CD
CD
CD
CD
CD
CD
CD
CD
CP
MR
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Please note that this diagram is provided only for the understanding of logic operations and should not be
used to estimate propagation delays.
DC Characteristics (unless otherwise specified)
Item
Symbol Max
Unit
Maximum quiescent supply current I_CC
80
µA
Maximum quiescent supply current I_CC
8.0
µA
Maximum additional I_CC/input
(HD74ACT164)
I _CCT
1.5
mA
Condition
V_IN = V_CC or ground, V_CC = 5.5 V,
Ta = Worst case
V_IN = V_CC or ground, V_CC = 5.5 V,
Ta = 25°C
V_IN = V_CC – 2.1 V, V_CC = 5.5 V,
Ta = Worst case
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