AT49F020-55JC ATMEL Corporation, AT49F020-55JC Datasheet - Page 5

• Manufacturer Part Number: AT49F020-55JC
• Description: 2-Megabit 256K x 8 5-volt Only CMOS Flash Memory
• Manufacturer: ATMEL Corporation

AC Read Characteristics
AC Read Waveforms
Notes:
Input Test Waveforms and Measurement Level
Pin Capacitance
(f = 1 MHz, T = 25°C)
Note:
Symbol
t
t
t
t
t
C
C
ACC
CE
OE
DF
OH
DRIVING
LEVELS
t
IN
OUT
R
(1)
(3)(4)
, t
(2)
AC
F
< 5 ns
1. CE may be delayed up to t
2. OE may be delayed up to t
3. t
4. This parameter is characterized and is not 100% tested.
1. This parameter is characterized and is not 100% tested.
without impact on t
DF
Parameter
Address to Output Delay
CE to Output Delay
OE to Output Delay
CE or OE to Output Float
Output Hold from OE, CE or
Address, whichever occurred first
3.0V
0.0V
is specified from OE or CE whichever occurs first (C
1.5V
(1)
ADDRESS
OUTPUT
ACC
(1)(2)(3)(4)
.
OE
CE
Typ
ACC
CE
4
8
- t
- t
AC
MEASUREMENT
LEVEL
OE
CE
after the falling edge of CE without impact on t
after the address transition without impact on t
Min
AT49F020-55
0
0
0
ADDRESS VALID
HIGH Z
t
Max
t
ACC
CE
12
6
L
= 5 pF).
Max
30
25
55
55
OUTPUT VALID
Min
AT49F020-70
0
0
0
t
OH
Units
Output Test Load
CE
pF
pF
ACC
Max
35
25
or by t
70
70
.
1.8K
1.3K
ACC
t
DF
5.0V
- t
Min
AT49F020-90
0
0
0
OE
OUTPUT
after an address change
PIN
100 pF
Conditions
V
V
Max
OUT
40
25
90
90
IN
= 0V
= 0V
Units
ns
ns
ns
ns
ns
5