Rainbow Electronics AT29C257 - Manual (Page 4)

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
µ
A
I LO Output Leakage Current V I/O = 0V to V CC 10
µ
A
I
SB1
V
CC
Standby Current CMOS CE = V
CC
- 0.3V to V
CC
300
µ
A
I
SB2
V
CC
Standby Current TTL CE = 2.0V to V
CC
3 mA
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
µ
A 2.4 V
V OH2 Output High Voltage CMOS I OH = -100
µ
A; 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
°
C 0
°
C - 70
°
C 0
°
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%
4-108
AT29C257