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AT28HC256F Datasheet(PDF) 4 Page - ATMEL Corporation

Part # AT28HC256F
Description  256 32K x 8 High Speed Parallel EEPROMs
Download  12 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT28HC256F Datasheet(HTML) 4 Page - ATMEL Corporation

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background image
Symbol
Parameter
Condition
Min
Max
Units
ILI
Input Load Current
VIN = 0V to VCC + 1V
10
µA
ILO
Output Leakage Current
VI/O = 0V to VCC
10
µA
ISB1
VCC Standby Current TTL
CE = 2.0V to VCC + 1V
AT28HC256-90, -12
3
mA
AT28HC256-70
60
mA
ISB2
VCC Standby Current CMOS
CE = -3.0V to VCC + 1V
AT28HC256-90, -12
300
µA
ICC
VCC Active Current
f = 5 MHz; IOUT = 0 mA
80
mA
VIL
Input Low Voltage
0.8
V
VIH
Input High Voltage
2.0
V
VOL
Output Low Voltage
IOL = 6.0 mA
.45
V
VOH
Output High Voltage
IOH = -4 mA
2.4
V
DC Characteristics
AT28HC256-70
AT28HC256-90
AT28HC256-12
Operating
Temperature (Case)
Com.
0°C - 70°C
0°C - 70°C
0°C - 70°C
Ind.
-40°C - 85°C
-40°C - 85°C
-40°C - 85°C
Mil.
-55°C - 125°C
-55°C - 125°C
VCC Power Supply
5V
± 10%
5V
± 10%
5V
± 10%
DC and AC Operating Range
Mode
CE
OE
WE
I/O
Read
VIL
VIL
VIH
DOUT
Write (2)
VIL
VIH
VIL
DIN
Standby/Write Inhibit
VIH
X
(1)
X
High Z
Write Inhibit
X
X
VIH
Write Inhibit
X
VIL
X
Output Disable
X
VIH
X
High Z
Chip Erase
VIL
VH
(3)
VIL
High Z
3. VH = 12.0V
± 0.5V.
Notes: 1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms.
Operating Modes
DEVICE IDENTIFICATION: An extr a 64- b y te s o f
E2PROM memory are available to the user for device
identification. By raising A9 to 12V
± 0.5V and using ad-
dress locations 7FC0H to 7FFFH the additional bytes may
be written to or read from in the same manner as the regu-
lar memory array.
OPTIONAL CHIP ERASE MODE: The entire device can
be erased using a 6-byte software code. Please see Soft-
ware Chip Erase application note for details.
Device Operation (Continued)
2-282
AT28HC256


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