74HC_HCT166_15 Datasheet, PDF (5/21 Pages) NXP Semiconductors – 8-bit parallel-in/serial out shift register

NXP Semiconductors
74HC166; 74HCT166
8-bit parallel-in/serial out shift register
6. Functional description
Table 3. Function table^[1]
Operating modes Inputs
Qn registers
Output
PE
CE
CP
DS
D0 to D7 Q0
Q1 to Q6 Q7
parallel load
I
I

X
I
L
L to L
L
I
I

X
h
H
H to H
H
serial shift
h
I

l
X
L
q0 to q5 q6
h
I

h
X
H
q0 to q5 q6
hold “do nothing”
X
H
X
X
X
q0
q1 to q6 q7
[1] H = HIGH voltage level;
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition;
L = LOW voltage level;
l = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition;
q = state of the referenced output one set-up time prior to the LOW-to-HIGH clock transition;
X = don’t care;
 = LOW-to-HIGH clock transition.
CP
mode
control
CE
inputs
MR
parallel
inputs
DS
shift/
load
D0
D1
D2
D3
D4
D5
D6
D7
output
Q7
clear
serial shift
H
L
H
L
H
L
H
H
HH ^L H ^L H ^L H
inhibit
serial shift
load
aaa-008820
Fig 6. Typical clear, shift, load, inhibit, and shift sequences
74HC_HCT166
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 11 September 2013
© NXP B.V. 2013. All rights reserved.
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