W49F002U-12B Winbond Electronics, W49F002U-12B Datasheet - Page 16

• Manufacturer Part Number: W49F002U-12B
• Manufacturer: Winbond Electronics

Specifications of W49F002U-12B

• Density: 2Mb
• Access Time (max): 120ns
• Interface Type: Parallel
• Boot Type: Top
• Address Bus: 18b
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: PDIP
• Program/erase Volt (typ): 5V
• Sync/async: Asynchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Word Size: 8b
• Number Of Words: 256K
• Supply Current: 50mA
• Mounting: Through Hole
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

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
Erase Cycle Time
DD
= 5.0V 10%, V
(a) High level signal's reference level is V
PARAMETER
PARAMETER
DD
= 0V, T
A
= 0 to 70 C)
SYM.
T
T
T
T
T
T
T
T
T
IH
RC
CE
AA
OE
CLZ
OLZ
CHZ
OHZ
OH
and (b) low level signal's reference level is V
SYMBOL
W49F002U-70
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
- 16 -
MAX.
70
70
35
25
25
-
-
-
-
MIN.
100
100
100
50
50
10
0
0
0
0
0
-
-
W49F002U-90 W49F002U-120
MIN.
90
0
0
0
-
-
-
-
-
TYP.
MAX.
0.1
35
90
90
40
25
25
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
IL
.
MIN.
120
0
0
0
-
-
-
-
-
MAX.
W49F002U
0.2
50
-
-
-
-
-
-
-
-
-
-
-
MAX.
120
120
50
30
30
-
-
-
-
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
S
UNIT
S
nS
nS
nS
nS
nS
nS
nS
nS
nS