w29c020-12b Winbond Electronics Corp America, w29c020-12b Datasheet - Page 12

• Manufacturer Part Number: w29c020-12b
• Description: 256k X 8 Cmos Flash Memory
• Manufacturer: Winbond Electronics Corp America

AC Characteristics, continued
Read Cycle Timing Parameters
(V
Byte/Page-write Cycle Timing Parameters
Note: All AC timing signals observe the following guideline for determining setup and hold times:
Read Cycle Time
Chip Enable Access Time
Address Access Time
Output Enable Access Time
Output Hold from Address change
CE High to High-Z Output
OE High to High-Z Output
Write Cycle (erase and program)
Address Setup Time
Address Hold Time
Data Setup Time
Data Hold Time
Byte Load Cycle 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
DD
= 5.0V 10
Reference level is V
PARAMETER
for 90 nS and 120 nS; V
PARAMETER
IH
for high-level signal and V
DD
= 5.0V 5% for 70 nS, V
T
T
T
T
T
T
T
SYM.
RC
CE
AA
OE
CHZ
OHZ
OH
IL
for low-level signal.
SYMBOL
- 12 -
W29C020-70 W29C020-90 W29C020-12
MIN.
T
T
T
T
T
T
T
T
T
T
T
T
T
70
WC
AS
AH
CS
CH
OES
OEH
CP
WP
WPH
DS
DH
BLC
0
-
-
-
-
-
SS
MAX. MIN.
= 0V, T
70
70
35
25
25
-
-
MIN.
A
100
50
70
70
50
0
0
0
0
0
0
= 0 to 70 C)
-
-
90
0
-
-
-
-
-
MAX.
90
90
40
25
25
TYP.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MIN.
120
0
-
-
-
-
-
MAX.
150
W29C020
10
-
-
-
-
-
-
-
-
-
-
-
MAX.
120
120
50
30
30
-
-
UNIT
mS
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
S