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AT28C64(X)
AC Read Characteristics
AT28C64-12
AT28C64-15
AT28C64-20
AT28C64-25
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Min
Max
Units
t ACC
Address to Output Delay
120
150
200
250
ns
t CE
(1)
CE to Output Delay
120
150
200
250
ns
t OE
(2)
OE to Output Delay
10
60
10
70
10
80
10
100
ns
t DF
(3)(4)
CE or OE High to Output Float
0
45
0
50
0
55
0
60
ns
t OH
Output Hold from OE, CE or
Address, whichever occurred first
0
0
0
0
ns
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.
Input Test Waveforms and
Measurement Level
t R , t F < 20 ns
Pin Capacitance
f = 1 MHz, T = 25 ° C (1)
Output Test Load
Symbol
C IN
C OUT
Typ
4
8
Max
6
12
Units
pF
pF
Conditions
V IN = 0V
V OUT = 0V
Note:
1. This parameter is characterized and is not 100% tested.
5
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