w49f020 ETC-unknow, w49f020 Datasheet - Page 12

• Manufacturer Part Number: w49f020
• Manufacturer: ETC-unknow

AC Characteristics, continued
Read Cycle Timing Parameters
(V
Write Cycle Timing Parameters
Note: All AC timing signals observe the following guidelines for determining setup and hold times:
Output Hold from Address Change
Address Setup Time
Address Hold Time
Data Setup Time
Data Hold Time
Byte programming Time
Erase Cycle Time
CE Pulse Width
Read Cycle Time
Chip Enable Access Time
Address Access Time
Output Enable Access Time
WE and CE Setup Time
WE and CE Hold Time
OE High Setup Time
OE High Hold Time
WE Pulse Width
WE High Width
CC
CE Low to Active Output
OE Low to Active Output
CE High to High-Z Output
OE High to High-Z Output
= 5.0V 10 , V
(a) High level signal's reference level is V
PARAMETER
PARAMETER
CC
= 0V, T
A
= 0 to 70 C)
IH
SYM.
T
T
T
T
T
T
T
T
and (b) low level signal's reference level is V
T
CHZ
OHZ
OH
OLZ
CLZ
OE
RC
CE
AA
SYMBOL
- 12 -
MIN.
T
T
T
T
T
T
T
T
T
T
T
T
T
70
0
0
0
-
-
-
-
-
AS
AH
CS
CH
OES
OEH
CP
WP
WPH
DS
DH
BP
EC
W49F020-70
MAX.
70
70
35
25
25
Preliminary W49F020
MIN.
100
100
100
-
-
-
-
50
50
0
0
0
0
0
0
-
-
IL
.
TYP.
MIN.
0.1
10
90
0
0
0
W49F020-90
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX.
MAX.
50
1
-
-
-
-
-
-
-
-
-
-
-
90
90
40
25
25
-
-
-
-
UNIT
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
S
nS
nS
nS
nS
nS
nS
nS
nS
nS
S