
9. AC Read Characteristics
AT28HC64B-70
AT28HC64B-90
AT28HC64B-120
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Units
t ACC
t CE (1)
Address to Output Delay
CE to Output Delay
70
70
90
90
120
120
ns
ns
t OE (2)
t DF (3)(4)
OE to Output Delay
OE to Output Float
0
0
35
35
0
0
40
40
0
0
50
50
ns
ns
t OH
Output Hold
0
0
0
ns
10. AC Read Waveforms (1)(2)(3)(4)
ADDRESS
ADDRESS VALID
CE
t CE
OE
t OE
t OH
t DF
t ACC
OUTPUT
HIGH Z
OUTPUT VALID
Notes:
6
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.
AT28HC64B
0274L–PEEPR–2/3/09