Operating Modes
Mode
Read
Program
(2)
Standby/Write Inhibit
Program Inhibit
Program Inhibit
Output Disable
Product Identification
CE
V
IL
V
IL
V
IH
X
X
X
OE
V
IL
V
IH
X
(1)
X
V
IL
V
IH
WE
V
IH
V
IL
X
V
IH
X
X
Ai
Ai
Ai
X
I/O
D
OUT
D
IN
High Z
High Z
Hardware
V
IL
V
IL
V
IH
A1 - A18 = V
IL
, A9 = V
H
,
(3)
A0 = V
IL
A1 - A18 = V
IL
, A9 = V
H
,
(3)
A0 = V
IH
A0 = V
IL
A0 = V
IH
Manufacturer Code
(4)
Device Code
(4)
Manufacturer Code
(4)
Device Code
(4)
Software
(5)
4. Manufacturer Code: 1F, Device Code: A4
5. See details under Software Product Identification Entry/Exit.
Notes: 1. X can be V
IL
or V
IH
.
2. Refer to AC Programming Waveforms.
3. V
H
= 12.0V
±
0.5V.
DC Characteristics
Symbol
I
LI
I
LO
Parameter
Input Load Current
Output Leakage Current
Condition
V
IN
= 0V to V
CC
V
I/O
= 0V to V
CC
Min
Max
10
10
100
300
3
40
0.8
Units
μ
A
μ
A
μ
A
μ
A
mA
mA
V
V
V
V
V
I
SB1
V
CC
Standby Current CMOS
CE = V
CC
- 0.3V to V
CC
Com.
Ind.
I
SB2
I
CC
V
IL
V
IH
V
OL
V
OH1
V
OH2
V
CC
Standby Current TTL
V
CC
Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Output High Voltage CMOS
CE = 2.0V to V
CC
f = 5 MHz; I
OUT
= 0 mA
2.0
I
OL
= 2.1 mA
I
OH
= -400
μ
A
I
OH
= -100
μ
A; V
CC
= 4.5V
.45
2.4
4.2
DC and AC Operating Range
AT29C040A-10
0
°
C - 70
°
C
-40
°
C - 85
°
C
5V
±
10%
AT29C040A-12
0
°
C - 70
°
C
-40
°
C - 85
°
C
5V
±
10%
AT29C040A-15
0
°
C - 70
°
C
-40
°
C - 85
°
C
5V
±
10%
Operating
Temperature (Case)
Com.
Ind.
V
CC
Power Supply
BOOT BLOCK LOCKOUT DETECTION:
A software
method is available to determine whether programming of
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
Device Operation
(Continued)
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.
4
AT29C040A