AT28C256 查看數據表（PDF） - Atmel Corporation
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AT28C256 Datasheet PDF : 25 Pages
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9. AC Read Characteristics
Symbol
tACC
tCE(1)
tOE(2)
tDF(3)(4)
tOH
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
AT28C256-15
Min Max
150
150
0
70
0
50
0
AT28C256-20
Min Max
200
200
0
80
0
55
0
AT28C256-25
Min Max
250
250
0
100
0
60
0
AT28C256-35
Min Max
350
350
0
100
0
70
0
10. AC Read Waveforms(1)(2)(3)(4)
Units
ns
ns
ns
ns
ns
Notes:
1. CE may be delayed up to tACC - tCE after the address transition without impact on tACC.
2. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE or by tACC - tOE after an address change
without impact on tACC.
3. tDF is specified from OE or CE whichever occurs first (CL = 5 pF).
4. This parameter is characterized and is not 100% tested.
6 AT28C256
0006M–PEEPR–12/09
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