74HC40104 Datasheet, PDF (4/8 Pages) NXP Semiconductors – 4-bit bidirectional universal shift register; 3-state

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 D_SR D_SL 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 t_n+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
t_n+1 = state after next LOW-to-HIGH transition of CP
Fig.4 Functional diagram.
December 1990
Fig.5 Logic diagram.
4