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