6
AC Timing Characteristics over Operating
Temperature Range at V
DD
= 4.5 V
Parameter
Address Setup
Address Hold
Data Setup
Data Hold
Chip Enable Setup
Chip Enable Hold
Write Time
Clear
Clear Disable
Symbol
t
AS
t
AH
t
DS
t
DH
t
CES
t
CEH
t
W
t
CLR
t
CLRD
Min.
10
40
50
40
0
0
75
10
1
Units
ns
ns
ns
ns
ns
ns
ns
µs
µs
Timing Diagram
2.0 V
0.8 V
t
CES
t
CEH
2.0 V
A
0
– A
1
, CU
t
AS
WR
t
AH
2.0 V
0.8 V
t
W
D
0
– D
6
t
DS
t
CLR
t
CLRD
2.0 V
CLR
0.8 V
t
DH
2.0 V
0.8 V
0.8 V
Enlarged Character Font
4.4 (0.175)
TYP.
CE
1
CE
2
1.09 (0.043)
TYP.
6.9 (0.27)
TYP.
0.25 (0.010)
TYP.
1.05 (0.041)
TYP.
NOTES:
1. UNLESS OTHERWISE SPECIFIED, THE TOLERANCE
ON ALL DIMENSIONS IS ± 0.254 mm (0.010").
2. DIMENSIONS ARE IN MILLIMETERS (INCHES).