Device Operation (Continued)
either boot block section is locked out. See Software Prod-
uct Identification Entry and Exit sections. When the device
is in the software product identification mode, a read from
location 00002H will show if programming the lower ad-
dress boot block is locked out while reading location
FFFF2H will do so for the upper boot block. If the data is
FE, the corresponding block can be programmed; if the
data is FF, the program lockout feature has been activated
and the corresponding block cannot be programmed. The
software product identification exit mode should be used
to return to standard operation.
DC and AC Operating Range
AT29C020-90
AT29C020-10
0°C - 70°C
-40°C - 85°C
5V ± 10%
AT29C020-12
0°C - 70°C
-40°C - 85°C
5V ± 10%
AT29C020-15
0°C - 70°C
-40°C - 85°C
5V ± 10%
Com.
Ind.
0°C - 70°C
5V ± 10%
Operating
Temperature (Case)
V
CC
Power Supply
Operating Modes
Mode
CE
OE
WE
Ai
Ai
Ai
Ai
X
I/O
Read
V
V
V
V
V
IH
D
D
IL
IL
IL
IH
IL
IH
IH
OUT
IN
(2)
Program
V
V
V
V
IL
IL
5V Chip Erase
(1)
Standby/Write Inhibit
Program Inhibit
V
X
X
High Z
High Z
X
X
V
IH
Program Inhibit
X
X
V
X
IL
Output Disable
V
X
IH
Product Identification
A1 - A17 = VIL, A9 = VH, (3)
A0 = VIL
A1 - A17 = VIL, A9 = VH,
A0 = VIH
(4)
Manufacturer Code
Hardware
V
V
IL
V
IH
IL
(4)
Device Code
(4)
A0 = VIL
A0 = VIH
Manufacturer Code
(5)
Software
(4)
Device Code
Notes: 1. X can be VIL or VIH.
4. Manufacturer Code: 1F, Device Code: DA
5. See details under Software Product Identification Entry/Exit.
2. Refer to AC Programming Waveforms.
3. VH = 12.0V ± 0.5V.
DC Characteristics
Symbol
Parameter
Condition
Min
Max
10
Units
µA
µA
µA
µA
mA
mA
V
I
LI
Input Load Current
Output Leakage Current
V
V
= 0V to V
CC
IN
I
LO
= 0V to V
CC
10
I/O
Com.
Ind.
100
300
3
I
V
Standby Current CMOS
CE = V - 0.3V to V
CC CC
SB1
CC
I
I
V
V
Standby Current TTL
Active Current
CE = 2.0V to V
CC
SB2
CC
CC
f = 5 MHz; I
= 0 mA
40
CC
OUT
V
V
V
V
V
Input Low Voltage
0.8
IL
Input High Voltage
2.0
V
IH
Output Low Voltage
Output High Voltage
Output High Voltage CMOS
I
= 2.1 mA
.45
V
OL
OH1
OH2
OL
OH
OH
I
I
= -400 µA
= -100 µA; V = 4.5V
2.4
4.2
V
V
CC
4
AT29C020
ATMEL [ ATMEL ]
