CD74HC4094 Datasheet, PDF (2/8 Pages) Texas Instruments – High Speed CMOS Logic 8-Stage Shift and Store Bus Register, Three-State

Functional Diagram
CD74HC4094, CD74HCT4094
2
DATA
3
CP
8-STAGE
SHIFT
REGISTER
9
QS₁
10
QS₂
1
STROBE
8-BIT
STORAGE
REGISTER
15
OE
THREE-
STATE
OUTPUT
4
5 ^Q0
6 ^Q1
7 ^Q2
14 ^Q3
13 ^Q4
Q₅
12
Q₆
11
Q₇
GND = 8
V_CC = 16
TRUTH TABLE
INPUTS
PARALLEL OUTPUTS
SERIAL OUTPUTS
CP
OE
STR
D
Q₀
Q_n
QS₁ (NOTE 4)
QS₂
↑
L
X
X
Z
Z
Q’6
NC
↓
L
X
X
Z
Z
NC
Q₇
↑
H
L
X
NC
NC
Q’6
NC
↑
H
H
L
L
Q_n -1
Q’6
NC
↑
H
H
H
H
Q_n -1
Q’6
NC
↓
H
H
H
NC
NC
NC
Q₇
NOTES:
3. H = High Voltage Level, L = Low Voltage Level, X = Don’t Care, NC = No charge, Z = High Impedance Off-state,
↑ = Transition from Low to High Level, ↓ = Transition from High to Low.
4. At the positive clock edge the information in the seventh register stage is transferred to the 8th register stage and QS₁ output.
2