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 +14.0V
Input Voltage Range, All inputs except A9
**
..-0.6V to +6.5V
A9.....-0.6V to +13.5V
Output Voltage Range**...............................-0.6V to V
CC
+1V
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
SMJ27C256
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.
Exposure to absolute maximum rating conditions for extended
periods 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
SNAP! Pulse programming algorithm
Read Mode
SNAP! Pulse programming algorithm
TTL inputs
2
1
MIN
4.5
6.25
12.75
2
TYP
5
6.5
13
High-level input voltage
Low-level input voltage
Voltage level on A9 for signature mode
Operating free-air temperature
Operating case temperature
MAX
5.5
6.75
V
CC
-0.6
13.25
V
CC
+1
V
CC
+1
0.8
0.2
13
UNIT
V
V
V
V
V
V
V
V
V
°C
CMOS inputs V
CC
-0.2
TTL inputs
-0.5
CMOS inputs
-0.5
11.5
-55
+125
°C
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
V
OH
V
OL
I
I
I
O
I
PP1
I
PP2
I
CC1
PARAMETER
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
MIN
2.4
TYP
1
MAX
0.4
±1
±1
10
UNIT
V
V
µA
µA
µA
mA
µA
µA
35
50
500
300
TTL-Input Level
CMOS-Input Level V
CC
= 5.5V, E\=V
CC
'27C256-15
'27C256-17
'27C256-20
'27C256-25
E\=V
IL
, V
CC
=5.5V
t
cycle
= minimum, outputs
open
15
I
CC2
V
CC
supply current (active)
25
mA
Output current (leakage)
I
OS
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.
SMJ27C256/AS27C256
Rev. 2.5 10/03
100
mA
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
6
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