Rainbow Electronics AT27BV256 - Manual (Page 5)

AT27BV256
5
AC Waveforms for Read Operation
(1)
Notes: 1. Timing measurement references are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless otherwise specified.
2. OE may be delayed up to t
CE
-t
OE
after the falling edge of CE without impact on t
CE
.
3. OE may be delayed up to t
ACC
-t
OE
after the address is valid without impact on t
ACC
.
4. This parameter is only sampled and is not 100% tested.
5. Output float is defined as the point when data is no longer driven.
6. When reading a 27BV256, a 0.1
µ
F capacitor is required across V
CC
and ground to suppress spurious voltage transients.
AC Characteristics for Read Operation
V
CC
= 2.7V to 3.6V and 4.5V to 5.5V
Symbol Parameter Condition
AT27BV256
Units
-70 -90 -12 -15
Min Max Min Max Min Max Min Max
t
ACC
(3) Address to Output Delay CE = OE = V
IL
70 90 120 150 ns
t
CE
(2) CE to Output Delay OE = V
IL
70 90 120 150 ns
t
OE
(2)(3) OE to Output Delay CE = V
IL
50 50 50 60 ns
t
DF
(4)(5)
OE or CE High to Output Float,
whichever occurred first
40 40 40 50 ns
t
OH
Output Hold from Address, CE
or OE, whichever occurred first
0 0 0 0 ns