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)
X X High Z
Write Inhibit X X V
IH
Write Inhibit X V
IL
X
Output Disable X V
IH
X High Z
High Voltage Chip Erase V
IL
V
H
(3)
V
IL
X High Z
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)
4. Manufacturer Code: 1F, Device Code: DC
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 Parameter Condition Min Max Units
I
LI
Input Load Current V
IN
= 0V to V
CC
10 µA
I
LO
Output Leakage Current V
I/O
= 0V to V
CC
10 µA
I
SB1
V
CC
Standby Current CMOS CE = V
CC
- 0.3V to V
CC
300 µA
I
SB2
V
CC
Standby Current TTL CE = 2.0V to V
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
= 2.1 mA .45 V
V
OH1
Output High Voltage I
OH
= -400 µA 2.4 V
V
OH2
Output High Voltage CMOS I
OH
= -100 µA; V
CC
= 4.5V 4.2 V
DC and AC Operating Range
AT29C257-70 AT29C257-90 AT29C257-12 AT29C257-15
Operating
Temperature (Case)
Com. 0°C - 70°C0°C - 70°C0°C - 70°C0°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%
4-108 AT29C257
