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AT49F040A Datasheet(PDF) 7 Page - ATMEL Corporation

Part No. AT49F040A
Description  4-megabit (512K x 8) 5-volt Only Flash Memory
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT49F040A Datasheet(HTML) 7 Page - ATMEL Corporation

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AT49F040A
3359B–FLASH–10/04
AC Read Waveforms (1)(2)(3)(4)
Notes:
1. CE may be delayed up to t
ACC - tCE after the address transition without impact on tACC.
2. OE may be delayed up to t
CE - tOE after the falling edge of CE without impact on tCE or by tACC - tOE after an address change
without impact on t
ACC.
3. t
DF is specified from OE or CE whichever occurs first (CL = 5 pF).
4. This parameter is characterized and is not 100% tested.
AC Read Characteristics
Symbol
Parameter
AT49F040A-55
AT49F040A-70
Units
Min
Max
Min
Max
t
ACC
Address to Output Delay
55
70
ns
tCE
(1)
CE to Output Delay
55
70
ns
t
OE
(2)
OE to Output Delay
0
30
0
35
ns
t
DF
(3)(4)
CE or OE to Output Float
0
25
0
25
ns
tOH
Output Hold from OE, CE or Address, whichever
occurred first
0
0
ns
ADDRESS
OUTPUT
HIGH Z
OUTPUT
OE
CE
tACC
tOE
t DF
tOH
tCE
VALID
ADDRESS
VALID


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