UVEPROM
Austin Semiconductor, Inc.
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage Range, V
CC
**...........................-0.6V to +7.0V
Supply Voltage Range, V
pp
**...............................-0.6V to +13.5V
Input Voltage Range, All inputs except A9
**
..-0.6V to +6.0V
A9.....-0.6V to +13.5V
Output Voltage Range**...............................-0.6V to V
CC
+.6V
Minimum Operating Free-air Temperature, T
A
..............-55°C
Maximum Operating Case Temperature, T
C
...................125°C
Storage Temperature Range, T
stg
.....................-65°C to 150°C
AS27C256
*Stresses greater than those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
these or any other conditions above those indicated in the
operation section of this specification is not implied.
Expo-
sure to absolute maximum rating conditions for extended peri-
ods may affect reliability.
** All voltage values are with respect to GND.
RECOMMENDED OPERATING CONDITIONS
V
CC
V
PP
V
IH
V
IL
V
ID
T
A
T
C
Supply Voltage
Supply Voltage
Read Mode
FLASHRITE Pulse programming algorithm
Read Mode
FLASHRITE Pulse programming algorithm
TTL inputs
CMOS inputs
Low-level input voltage
Voltage level on A9 for signature mode
Operating free-air temperature
Operating case temperature
TTL inputs
CMOS inputs
2
1
MIN
4.5
6
TYP
5
6.25
12.75
MAX
5.5
6.5
V
CC
-0.6
13
V
CC
+.6
V
CC
+.6
0.8
0.2
12.5
2.2
V
CC
-0.2
-0.5
-0.5
11.5
-55
High-level input voltage
12
12.5
+125
NOTES:
1. V
CC
must be applied before or at the same time as V
PP
and removed after or at the same time as V
PP
. The deivce must not be inserted into or
removed from the board when V
PP
or V
CC
is applied.
2. V
PP
can be connected to V
CC
directly (except in the program mode). V
CC
supply current in this case would be I
CC2
+ I
PP1
.
ELECTRICAL CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE
AND OPERATING FREE-AIR TEMPERATURE
PARAMETER
V
OH
V
OL
I
I
I
O
I
PP1
I
PP2
I
CC1
High-level output voltage
Low-level output voltage
Input current (leakage)
Output current (leakage)
V
PP
supply current
V
PP
supply current (during program pulse)
V
CC
supply current (standby)
2
TEST CONDITIONS
I
OH
= -400µA
I
OL
= 2.1mA
V
I
= 0V to 5.5V
V
O
= 0V to V
CC
V
PP
= V
CC
= 5.5V
V
PP
= 13V
V
CC
= 5.5V, E\=V
IH
V
CC
= 5.5V, E\=V
CC
E\=V
IL
, V
CC
=5.5V
t
cycle
= minimum, outputs
open
MIN
2.4
TYP
1
MAX
UNIT
V
0.4
±1
±5
100
30
50
1
300
V
µA
µA
µA
mA
mA
µA
TTL-Input Level
CMOS-Input Level
'27C256-12
'27C256-15
'27C256-17
'27C256-20,-25
I
CC2
V
CC
supply current (active)
15
25
mA
NOTES:
1. Typical values are at T
A
=25°C and nominal voltages.
2. This parameter has been characterized at 25°C and is not tested.
AS27C256
Rev. 2.0 7/06
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
6
AUSTIN [ AUSTIN SEMICONDUCTOR ]
