AT28C256 ATMEL Corporation, AT28C256 Datasheet - Page 9

• Manufacturer Part Number: AT28C256
• Description: 256K 32K x 8 Paged CMOS E2PROM
• Manufacturer: ATMEL Corporation

Notes: 1. These parameters are characterized and not 100% tested.
Notes: 1. Toggling either OE or CE or both OE and CE will
Data Polling Characteristics
Notes: 1. These parameters are characterized and not 100% tested.
Data Polling Waveforms
Toggle Bit Characteristics
Toggle Bit Waveforms
Symbol
t
t
t
t
t
Symbol
t
t
t
t
DH
OEH
OE
OEHP
WR
DH
OEH
OE
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
OE High Pulse
Write Recovery Time
Parameter
Data Hold Time
OE Hold Time
OE to Output Delay
Write Recovery Time
(1, 2, 3)
(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 address
2. See AC Read Characteristics.
should not vary.
Typ
Typ
AT28C256
Max
Max
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
2-225