Read cycle timing parameters, Write cycle timing parameters – Rainbow Electronics W49F002U User Manual
Page 14
W49F002U
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14
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AC Characteristics, continued
Read Cycle Timing Parameters
(V
CC
= 5.0V
±
10
%
, V
CC
= 0V, T
A
= 0 to 70
°
C)
PARAMETER SYM. W49F002U-70 W49F002U-90 W49F002U-120 UNIT
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
Read Cycle Time
T
RC
70 - 90 - 120 - nS
Chip Enable Access Time
T
CE
- 70 - 90 - 120
nS
Address Access Time
T
AA
- 70 - 90 - 120
nS
Output Enable Access Time
T
OE
- 35 - 40 - 50 nS
CE Low to Active Output
T
CLZ
0 - 0 - 0 - nS
OE Low to Active Output
T
OLZ
0 - 0 - 0 - nS
CE
High to High-Z Output
T
CHZ
- 25 - 25 - 30 nS
OE
High to High-Z Output
T
OHZ
- 25 - 25 - 30 nS
Output Hold from Address Change
T
OH
0 - 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
10 - - nS
Byte Programming Time
T
BP
- 35 50
µ
S
Erase Cycle Time
T
EC
- 0.1
0.2 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
.