RA4803SA
Page - 5
ETM38E-03
7.2. AC Characteristics
* Unless otherwise specified, GND
=
0
V
,
Ta
=
−
40
°
C
to
+85
°
C
Item
Symbol
Condition
2.4V
≤
V
DD
<
4.5V 4.5V
≤
V
DD
≤
5.5V
Unit
Min.
Max.
Min.
Max.
CLK clock cycle
t
CLK
500
350
ns
CLK H pulse width
t
W H
220
155
ns
CLK L pulse width
t
W L
220
155
ns
CLK rise and fall time
t
RF
60
40
ns
CLK setup time
t
CLKS
50
25
ns
CE setup time
t
CS
200
150
ns
CE hold time
t
CH
200
150
ns
CE recovery time
t
CR
300
200
ns
CE enable time
t
W CE
0.95
0.95
s
Write data setup time
t
DS
100
50
ns
Write data hold time
t
DH
100
50
ns
Read data delay time
t
RD
C
L
=50 pF
200
150
ns
DO output switching time
t
ZR
50
20
ns
DO output disable time
t
RZ
C
L
=50 pF
R
L
=10 k
Ω
200
150
ns
DI/DO conflict avoiding time
t
ZZ
0
0
ns
FOUT duty
t
W
/ t
50% V
DD
level
40
60
40
60
%
Timing chart
CLK
C E
t
CLKS
t
WH
t
WL
t
CH
t
CR
•
Read
D I
t
DS
•
Write
t
DH
M 3
M 2
A 0
80%
20%
t
RF
t
RF
D O
D 7
D 6
D 0
Hi-Z
D I
M 3
M 2
A 0
D 7
D 0
t
CLK
D 6
D O
Hi-Z
t
WCE
t
RZ
t
ZZ
t
RD
t
ZR
t
CS
∗
If DI and DO pins are wired-OR connected to make it to 3 lines form, secure tzz to avoid bus conflict.
