w39l020 Winbond Electronics Corp America, w39l020 Datasheet - Page 17

• Manufacturer Part Number: w39l020
• Description: 256k U 8 Cmos Flash Memory
• Manufacturer: Winbond Electronics Corp America

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:
Read Cycle Time
Chip Enable Access Time
Address Access Time
Output Enable Access Time
#CE Low to Active Output
#OE Low to Active Output
#CE High to High-Z Output
#OE High to High-Z Output
Output Hold from Address Change
Address Setup Time
Address Hold Time
#WE and #CE Setup Time
#WE and #CE Hold Time
#OE High Setup Time
#OE High Hold Time
#CE Pulse Width
#WE Pulse Width
#WE High Width
Data Setup Time
Data Hold Time
Byte Programming Time
Chip Erase Cycle Time
Sector/Page Erase Cycle Time
DD
= 3.3V r0.3V, V
(a) High level signal's reference level is V
PARAMETER
PARAMETER
SS
= 0V, T
A
= 0 to 70q C)
IH
and (b) low level signal's reference level is V
SYM.
T
T
T
T
T
T
T
T
T
RC
CE
AA
OE
CLZ
OLZ
CHZ
OHZ
OH
SYMBOL
T
T
T
T
T
T
T
T
T
T
T
T
T
T
AS
AH
CS
CH
OES
OEH
CP
WP
WPH
DS
DH
BP
EC
EP
- 17 -
MIN.
70
W39L020-70
0
0
0
-
-
-
-
-
MIN.
100
100
100
Publication Release Date: November 11, 2002
40
40
10
0
0
0
0
0
-
-
-
MAX.
70
70
35
25
25
-
-
-
-
TYP.
12.5
35
50
MIN.
-
-
-
-
-
-
-
-
-
-
-
90
W39L020-90
0
0
0
-
-
-
-
-
IL
.
MAX.
100
MAX.
50
25
-
-
-
-
-
-
-
-
-
-
-
90
90
45
25
25
W39L020
-
-
-
-
Revision A4
UNIT
UNIT
mS
mS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
PS
nS
nS
nS
nS
nS
nS
nS
nS
nS