TIMING REQUIREMENTS (Input t = t = 10 ns unless otherwise indicated)
r
f
V
DD
V
Guaranteed Limit
Guaranteed Limit
25°C
– 40 to 85°C
Symbol
Parameter
Unit
f
Serial Data Clock Frequency, Assuming 25% Duty Cycle
3
5
9
dc to 5.0
dc to 7.1
dc to 10
dc to 3.5
dc to 7.1
dc to 10
MHz
clk
NOTE: Refer to CLK t
(Figure 6)
below
w(H)
t
Minimum Setup Time, Data to CLK
(Figure 7)
3
5
9
30
20
18
30
20
18
ns
ns
ns
ns
ns
µs
su
t
Minimum Hold Time, CLK to Data
(Figure 7)
3
5
9
40
20
15
40
20
15
h
t
su
Minimum Setup Time, CLK to ENB
(Figure 7)
3
5
9
70
32
25
70
32
25
t
Minimum Recovery Time, ENB to CLK
(Figure 7)
3
5
9
5
10
20
5
10
20
rec
t
Minimum Pulse Width, CLK and ENB
(Figure 6)
3
5
9
50
35
25
70
35
25
w(H)
t , t
r f
Maximum Input Rise and Fall Times — Any Input
(Figure 8)
3
5
9
5
4
2
5
4
2
SWITCHING WAVEFORMS
— V
DD
t
DATA
w(H)
50%
— V
DD
V
SS
CLK,
ENB
t
su
50%
t
h
V
*
SS
1
— V
V
DD
4 f
clk
LAST
CLK
FIRST
CLK
CLK
ENB
50%
SS
*Assumes 25% Duty Cycle.
t
t
su
rec
— V
V
DD
Figure 6.
50%
SS
PREVIOUS
DATA
LATCHED
t
t
f
t
ANY
OUTPUT
— V
DD
90%
10%
Figure 7.
V
SS
Figure 8.
MC145151–2 through MC145158–2
26
MOTOROLA
MOTOROLA [ MOTOROLA ]
