AT28HC256-12 ATMEL [ATMEL Corporation], AT28HC256-12 Datasheet - Page 4

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

Device Operation (Continued)
DEVICE IDENTIFICATION: A n e x t r a 6 4 - b y t e s o f
E
identification. By raising A9 to 12V
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.
DC and AC Operating Range
Operating Modes
Notes: 1. X can be V
DC Characteristics
2-282
2
Symbol
I
I
I
I
I
V
V
V
V
Operating
Temperature (Case)
V
LI
LO
SB1
SB2
CC
PROM memory are available to the user for device
Mode
Read
Write
Standby/Write Inhibit
Write Inhibit
Write Inhibit
Output Disable
Chip Erase
IL
IH
OL
OH
CC
Power Supply
2. Refer to AC Programming Waveforms.
(2)
Input Load Current
Output Leakage Current
V
V
V
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Parameter
CC
CC
CC
Active Current
Standby Current TTL
Standby Current CMOS
IL
AT28HC256
or V
IH
Com.
Ind.
Mil.
.
0.5V and using ad-
V
CE
V
V
V
X
X
X
IH
AT28HC256-70
IL
IL
IL
-40°C - 85°C
0°C - 70°C
5V
Condition
V
V
CE = 2.0V to V
CE = -3.0V to V
f = 5 MHz; I
I
I
OL
OH
IN
I/O
= 6.0 mA
= -4 mA
= 0V to V
= 0V to V
10%
OUT
CC
CC
CC
CC
= 0 mA
+ 1V
V
X
OE
V
V
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.
V
V
3. V
H
+ 1V
X
+ 1V
IL
IH
(1)
IL
IH
(3)
H
= 12.0V
AT28HC256-90
-55°C - 125°C
-40°C - 85°C
0°C - 70°C
5V
AT28HC256-90, -12
AT28HC256-70
AT28HC256-90, -12
10%
0.5V.
WE
V
V
V
V
X
X
X
IL
IH
IH
IL
Min
2.0
2.4
AT28HC256-12
-55°C - 125°C
-40°C - 85°C
0°C - 70°C
I/O
D
D
High Z
High Z
High Z
5V
OUT
IN
Max
300
0.8
.45
10
10
60
80
10%
3
Units
mA
mA
mA
V
V
V
V
A
A
A