AT28BV256-20 ATMEL Corporation, AT28BV256-20 Datasheet - Page 9

• Manufacturer Part Number: AT28BV256-20
• Description: 256K (32K x 8) Battery-Voltage Parallel EEPROMs
• Manufacturer: ATMEL Corporation

DATA Polling Characteristics
Notes:
DATA Polling Waveforms
Toggle Bit Characteristics
Notes:
Toggle Bit Waveforms
Notes:
0273H–PEEPR–10/04
Symbol
t
t
t
t
Symbol
t
t
t
t
t
DH
OEH
OE
WR
DH
OEH
OE
OEHP
WR
1. These parameters are characterized and not 100% tested.
2. See “AC Read Characteristics” on page 5.
1. These parameters are characterized and not 100% tested.
2. See “AC Read Characteristics” on page 5.
1. Toggling either OE or CE or both OE and CE will operate toggle bit.
2. Beginning and ending state of I/O6 will vary.
3. Any address location may be used but the address should not vary.
Parameter
Data Hold Time
OE Hold Time
OE to Output Delay
Write Recovery Time
Parameter
Data Hold Time
OE Hold Time
OE to Output Delay
OE High Pulse
Write Recovery Time
(2)
t
(2)
DH
t
(1)
DH
t
OEH
t
OEH
(1)
t
t
OE
OE
Min
Min
150
10
10
0
0
0
0
t
WR
Typ
Typ
t
WR
AT28BV256
Max
Max
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
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