74HC/HCT40104 查看數據表（PDF） - Philips Electronics
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74HC/HCT40104 Datasheet PDF : 8 Pages
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Philips Semiconductors
4-bit bidirectional universal shift register;
3-state
Product specification
74HC/HCT40104
FUNCTION TABLE
OPE-
RATING
MODES
reset
shift left
shift right
parallel
load
INPUTS (OE = HIGH)
S1 S0 DSR DSL D0
to
D3
L LX X X
HLX L X
HLX H X
L HL X X
L HH X X
H HX X L
H HX X H
OUTPUTS at tn+1
Q0 Q1 Q2 Q3
LL LL
Q1 Q2 Q3 L
Q1 Q2 Q3 H
L Q0 Q1 Q2
H Q0 Q1 Q2
LL LL
HH HH
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
tn+1 = state after next LOW-to-HIGH transition of CP
Fig.4 Functional diagram.
December 1990
Fig.5 Logic diagram.
4
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