Datasheet

6
0006M–PEEPR–12/09
AT28C256
10. AC Read Waveforms
(1)(2)(3)(4)
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.
9. AC Read Characteristics
Symbol Parameter
AT28C256-15 AT28C256-20 AT28C256-25 AT28C256-35
UnitsMin Max Min Max Min Max Min Max
t
ACC
Address to Output Delay 150 200 250 350 ns
t
CE
(1)
CE to Output Delay 150 200 250 350 ns
t
OE
(2)
OE to Output Delay 0 70 0 80 0 100 0 100 ns
t
DF
(3)(4)
CE or OE to Output Float 0 50 0 55 0 60 0 70 ns
t
OH
Output Hold from OE, CE or
Address, whichever occurred first
0000 ns