AT29C257-12 ATMEL Corporation, AT29C257-12 Datasheet - Page 5

• Manufacturer Part Number: AT29C257-12
• Description: 256K 32K x 8 5-volt Only CMOS Flash Memory
• Manufacturer: ATMEL Corporation

Notes: 1. CE may be delayed up to t
AC Read Characteristics
AC Read Waveforms
Input Test Waveforms and Measurement Level
t
Pin Capacitance
Note:
R
Symbol
t
t
t
t
t
ACC
CE
OE
DF
OH
, t
C
C
F
(3, 4)
(1)
(2)
IN
OUT
< 5 ns
2. OE may be delayed up to t
1. This parameter is characterized and is not 100% tested.
transition without impact on t
edge of CE without impact on t
after an address change without impact on t
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
(f = 1 MHz, T = 25°C)
(1, 2, 3, 4)
ACC
CE
ACC
- t
CE
- t
OE
.
CE
or by t
Typ
after the falling
4
8
after the address
AT29C257-70
Min
0
0
0
ACC
ACC
- t
Max
OE
70
70
40
25
.
(1)
AT29C257-90
Min
0
0
0
Max
3. t
4. This parameter is characterized and is not 100% tested.
12
6
(C
DF
L
Max
is specified from OE or CE whichever occurs first
= 5 pF).
90
90
40
25
AT29C257-12
Min
0
0
0
Output Test Load
Units
Max
120
120
pF
pF
50
30
AT29C257
AT29C257-15
Min
0
0
0
Conditions
V
V
IN
OUT
Max
150
150
70
40
= 0V
= 0V
Units
ns
ns
ns
ns
ns
4-109