9. AC Read Characteristics
AT28C256-15
Symbol
t
ACC
t
CE(1)
t
OE(2)
t
DF(3)(4)
t
OH
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
0
0
0
Min
Max
150
150
70
50
0
0
0
AT28C256-20
Min
Max
200
200
80
55
0
0
0
AT28C256-25
Min
Max
250
250
100
60
0
0
0
AT28C256-35
Min
Max
350
350
100
70
Units
ns
ns
ns
ns
ns
10. AC Read Waveforms
Notes:
1. CE may be delayed up to t
ACC
- t
CE
after the address transition without impact on t
ACC
.
2. OE may be delayed up to t
CE
- t
OE
after the falling edge of CE without impact on t
CE
or by t
ACC
- t
OE
after an address change
without impact on t
ACC
.
3. t
DF
is specified from OE or CE whichever occurs first (C
L
= 5 pF).
4. This parameter is characterized and is not 100% tested.
6
AT28C256
0006M–PEEPR–12/09
ATMEL [ ATMEL CORPORATION ]
