AT29C257-90JI Atmel, AT29C257-90JI Datasheet - Page 9

• Manufacturer Part Number: AT29C257-90JI
• Description: IC FLASH 256KBIT 90NS 32PLCC
• Manufacturer: Atmel

Specifications of AT29C257-90JI

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 256K (32K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT29C25790JI

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
Notes: 1. These parameters are characterized and not 100% tested.
Toggle Bit Waveforms
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.
2. See t
2. See t
operate toggle bit.
OE
OE
spec in AC Read Characteristics.
spec in AC Read Characteristics.
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
(1, 2, 3)
(2)
(2)
(1)
(1)
Min
150
10
0
0
Min
10
0
0
3. Any address location may be used but the address
should not vary.
Typ
Typ
AT29C257
Max
Max
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
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