HCC40104B Datasheet, PDF (7/12 Pages) STMicroelectronics – 4-BIT BIDIRECTIONAL UNIVERSAL SHIFT REGISTER

TRUTH TABLES
40104B
Mode
Clockv ^{Select O utput}
S 0 S 1 ^Enable
–/– ^{0 0}
1
–/– ^{1 0}
1
Action
Reset
Shift Right
(Q0 toward Q3)
–/– ^{0 1}
1
Shift Left
(Q3 toward Q0)
–/– ^{1 1}
1
Parallel Load
Operations occur as
X
XX
0
shown above, but
outputs assume high
impedance
Output Low (sink) Current Characteristics.
HCC/HCF40104B/40194B
40194B
Mode
Clock ^{Select Reset}
S0 S1
Action
X 0 0 1 No Change
–/– ^{1 0}
1
Shift Right
(Q0 toward Q3)
–/– ^{0 1}
1
Shift Left
(Q3 toward Q0)
–/– ^{1 1}
1
Parallel Load
X X X 0 Reset
1=High level
0=Low level
X= Don’t care
∆ = Level change
Output High (source) Current Characteristics.
Typical Propagation Delay Time vs. Load Capacit-
ance.
Typical Transition Time vs. Load Capacitance.
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