AT28HC256-12 ATMEL [ATMEL Corporation], AT28HC256-12 Datasheet - Page 9

• Manufacturer Part Number: AT28HC256-12
• Description: 256 32K x 8 High Speed Parallel EEPROMs
• Manufacturer: ATMEL [ATMEL Corporation]

Notes: 1. These parameters are characterized and not 100% tested.
Data Polling Characteristics
Notes: 1. These parameters are characterized and not 100% tested.
Data Polling Waveforms
Toggle Bit Characteristics
Toggle Bit Waveforms
Notes: 1. Toggling either OE or CE or both OE and CE will
Symbol
t
t
t
t
Symbol
t
t
t
t
t
DH
OEH
OE
WR
DH
OEH
OE
OEHP
WR
2. Beginning and ending state of I/O6 will vary
operate toggle bit.
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)
(2)
(1)
(1)
Min
150
10
10
0
Min
0
0
0
2. See AC Read Characteristics.
3. Any address location may be used but the
2. See AC Read Characteristics.
Typ
address should not vary.
Typ
AT28HC256
Max
Max
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
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