Manual

5
AT29C256
0046O–FLASH–06/02
Notes: 1. X can be V
IL
or V
IH
.
2. Refer to AC Programming Waveforms.
3. V
H
= 12.0V ± 0.5V.
4. Manufacturer Code: 1F, Device Code: DC.
5. See details under Software Product Identification Entry/Exit.
DC and AC Operating Range
AT29C256-70 AT29C256-90 AT29C256-12 AT29C256-15
Operating
Temperature (Case)
Com. 0°C-70°C0°C-70°C0°C-70°C
0°C-70°C
Ind. -40°C-85°C-40°C-85°C-40°C-85°C
-40°C-85°C
V
CC
Power Supply 5V ± 5% 5V± 10% 5V± 10% 5V± 10%
Note:
Not recommended for New Designs.
Operating Modes
Mode CE OE WE Ai I/O
Read V
IL
V
IL
V
IH
Ai D
OUT
Program
(2)
V
IL
V
IH
V
IL
Ai D
IN
5V Chip Erase V
IL
V
IH
V
IL
Ai
Standby/Write Inhibit V
IH
X
(1)
XXHighZ
Write Inhibit X X V
IH
Write Inhibit X V
IL
X
Output Disable X V
IH
XHighZ
High Voltage Chip Erase V
IL
V
H
(3)
V
IL
XHighZ
Product Identification
Hardware
V
IL
V
IL
V
IH
A1-A14 = V
IL
,A9=V
H
,A0=V
IL
Manufacturer Code
(4)
A1-A14 = V
IL
,A9=V
H
,A0=V
IH
Device Code
(4)
Software
(5)
A0 = V
IL
Manufacturer Code
(4)
A0 = V
IH
Device Code
(4)
DC Characteristics
Symbol Parameter Condition Min Max Units
I
LI
Input Load Current V
IN
=0VtoV
CC
10 µA
I
LO
Output Leakage Current V
I/O
=0VtoV
CC
10 µA
I
SB1
V
CC
Standby Current CMOS CE =V
CC
-0.3VtoV
CC
300 µA
I
SB2
V
CC
Standby Current TTL CE =2.0VtoV
CC
3mA
I
CC
V
CC
Active Current f = 5 MHz; I
OUT
= 0 mA 50 mA
V
IL
Input Low Voltage 0.8 V
V
IH
Input High Voltage 2.0 V
V
OL
Output Low Voltage I
OL
=2.1mA 0.45 V
V
OH1
Output High Voltage I
OH
=-400µA 2.4 V
V
OH2
Output High Voltage CMOS I
OH
=-100µA;V
CC
=4.5V 4.2 V