AT28C64B-25PC Atmel, AT28C64B-25PC Datasheet - Page 9

• Manufacturer Part Number: AT28C64B-25PC
• Manufacturer: Atmel

Specifications of AT28C64B-25PC

• Density: 64Kb
• Interface Type: Parallel
• Organization: 8Kx8
• Access Time (max): 250ns
• Write Protection: Yes
• Data Retention: 10Year
• Operating Supply Voltage (typ): 5V
• Package Type: PDIP
• Operating Temp Range: 0C to 70C
• Supply Current: 40mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 28
• Lead Free Status / Rohs Status: Not Compliant

Data Polling Characteristics
Notes:
Data Polling Waveforms
Toggle Bit Characteristics
Notes:
Toggle Bit Waveforms
Notes:
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”.
1. These parameters are characterized and not 100% tested.
2. See “AC Read Characteristics”.
1.
2.
3.
Toggling either OE or CE or both OE and CE will operate toggle bit.
Beginning and ending state of I/O6 will vary.
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)
(2)
(1)(2)(3)
(1)
(1)
Min
Min
150
10
10
0
0
0
0
AT28C64B
Typ
Typ
Max
Max
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
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