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AT49F040A Datasheet(PDF) 11 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) 11 Page - ATMEL Corporation

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AT49F040A
3359B–FLASH–10/04
Notes:
1. These parameters are characterized and not 100% tested.
2. See t
OE spec in AC Read Characteristics.
Data Polling Waveforms
Notes:
1. These parameters are characterized and not 100% tested.
2. See t
OE spec in AC Read Characteristics.
Toggle Bit Waveforms(1)(2)(3)
Notes:
1. Toggling either OE or CE or both OE and CE will operate toggle bit. The tOEHP specification must be met by the toggling
input(s).
2. Beginning and ending state of I/O6 will vary.
3. Any address location may be used but the address should not vary.
Data Polling Characteristics
(1)
Symbol
Parameter
Min
Typ
Max
Units
t
DH
Data Hold Time
10
ns
t
OEH
OE Hold Time
10
ns
tOE
OE to Output Delay
(2)
ns
t
WR
Write Recovery Time
0
ns
HIGH Z
An
An
An
An
An
WE
CE
OE
I/O7
A0-A18
tOEH
tOE
tDH
tWR
Toggle Bit Characteristics
(1)
Symbol
Parameter
Min
Typ
Max
Units
t
DH
Data Hold Time
10
ns
tOEH
OE Hold Time
10
ns
t
OE
OE to Output Delay
(2)
ns
t
OEHP
OE High Pulse
50
ns
tWR
Write Recovery Time
0
ns
WE
CE
OE
I/O6
tOEH
HIGH Z
tDH
tOE
tWR
tOEHP


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