AT28C256
5. DC and AC Operating Range
AT28C256-15
AT28C256-20
AT28C256-25
AT28C256-35
Ind.
Mil.
-40°C - 85°C
-55°C - 125°C
5V ± 10%
Operating Temperature
(Case)
-55°C - 125°C
-55°C - 125°C
-55°C - 125°C
VCC Power Supply
5V ± 10%
5V ± 10%
5V ± 10%
6. Operating Modes
Mode
CE
VIL
VIL
VIH
X
OE
VIL
VIH
X(1)
X
WE
VIH
VIL
X
I/O
DOUT
DIN
Read
Write(2)
Standby/Write Inhibit
Write Inhibit
Write Inhibit
Output Disable
High Z
VIH
X
X
VIL
VIH
X
X
High Z
High Z
(3)
Chip Erase
VIL
VH
VIL
Notes: 1. X can be VIL or VIH.
2. Refer to AC programming waveforms.
3. VH = 12.0V 0.5V.
7. Absolute Maximum Ratings*
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reliability
Temperature under Bias................................ -55°C to +125°C
Storage Temperature..................................... -65°C to +150°C
All Input Voltages
(including NC Pins)
with Respect to Ground ...................................-0.6V to +6.25V
All Output Voltages
with Respect to Ground .............................-0.6V to VCC + 0.6V
Voltage on OE and A9
with Respect to Ground ...................................-0.6V to +13.5V
8. DC Characteristics
Symbol
Parameter
Condition
Min
Max
10
Units
µA
µA
µA
µA
mA
mA
V
ILI
Input Load Current
Output Leakage Current
VIN = 0V to VCC + 1V
VI/O = 0V to VCC
ILO
10
Ind.
Mil.
200
300
3
ISB1
VCC Standby Current CMOS CE = VCC - 0.3V to VCC + 1V
ISB2
ICC
VCC Standby Current TTL
VCC Active Current
Input Low Voltage
CE = 2.0V to VCC + 1V
f = 5 MHz; IOUT = 0 mA
50
VIL
0.8
VIH
VOL
VOH
Input High Voltage
Output Low Voltage
Output High Voltage
2.0
2.4
V
IOL = 2.1 mA
IOH = -400 µA
0.45
V
V
5
0006M–PEEPR–12/09
ATMEL [ ATMEL ]
