Philips Semiconductors
Product specification
8-stage shift-and-store bus register
FUNCTION TABLE
INPUTS
CP
EO
L
L
H
H
H
H
Notes
1. H = HIGH state (the more positive voltage)
2. L = LOW state (the less positive voltage)
3. X = state is immaterial
4.
5.
= positive-going transition
= negative-going transition
STR
X
X
L
H
H
H
D
X
X
X
L
H
H
PARALLEL OUTPUTS
O
0
Z
Z
nc
L
H
nc
O
n
Z
Z
nc
O
n-1
O
n-1
nc
SERIAL OUTPUTS
O
s
O’
6
nc
O’
6
O’
6
O’
6
nc
O’
s
nc
O
7
nc
nc
nc
O
7
HEF4094B
MSI
6. Z = high impedance off state
7. nc = no change
8. O’
6
= the information in the seventh shift register stage
At the positive clock edge the information in the 7th register stage is transferred to the 8th register stage and the
O
s
output.
AC CHARACTERISTICS
V
SS
= 0 V; T
amb
= 25
°C;
input transition times
≤
20 ns
V
DD
V
Dynamic power
dissipation per
package (P)
5
10
15
TYPICAL FORMULA FOR P (µW)
2100 f
i
+ ∑
(f
o
C
L
)
×
V
DD2
9700 f
i
+ ∑
(f
o
C
L
)
×
V
DD2
26 000 f
i
+ ∑
(f
o
C
L
)
×
V
DD2
where
f
i
= input freq. (MHz)
f
o
= output freq. (MHz)
C
L
= load capacitance (pF)
∑
(f
o
C
L
) = sum of outputs
V
DD
= supply voltage (V)
January 1995
4
PHILIPS [ NXP SEMICONDUCTORS ]
