UVEPROM
AS27C256
Austin Semiconductor, Inc.
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage Range, VCC**...........................-0.6V to +7.0V
Supply Voltage Range, Vpp**...............................-0.6V to +13.5V
*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
Input Voltage Range,All inputs exceptA9**..-0.6V to +6.0V
A9.....-0.6V to +13.5V
operation section of this specification is not implied.
Expo-
sure to absolute maximum rating conditions for extended peri-
ods may affect reliability.
Output Voltage Range**...............................-0.6V to VCC +.6V
Minimum Operating Free-air Temperature, TA..............-55°C
Maximum Operating CaseTemperature, TC...................125°C
Storage Temperature Range, Tstg.....................-65°C to 150°C
** All voltage values are with respect to GND.
RECOMMENDED OPERATING CONDITIONS
MIN
TYP
5
MAX
5.5
Read Mode1
4.5
6
VCC
Supply Voltage
FLASHRITE Pulse programming algorithm
Read Mode2
6.25
6.5
VCC-0.6
13
VPP
Supply Voltage
FLASHRITE Pulse programming algorithm
12.5
2.2
12.75
TTL inputs
VCC+.6
VIH
VIL
High-level input voltage
Low-level input voltage
CMOS inputs VCC-0.2
VCC+.6
TTL inputs
-0.5
-0.5
0.8
0.2
CMOS inputs
Voltage level on A9 for signature mode
Operating free-air temperature
Operating case temperature
VID
TA
11.5
-55
12
12.5
TC
+125
NOTES:
1. VCC must be applied before or at the same time as VPP and removed after or at the same time as VPP. The deivce must not be inserted into or
removed from the board when VPP or VCC is applied.
2. VPP can be connected to VCC directly (except in the program mode). VCC supply current in this case would be ICC2 + IPP1
.
ELECTRICAL CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE
AND OPERATING FREE-AIR TEMPERATURE
TYP1
TEST CONDITIONS
IOH = -400µA
MIN
MAX
UNIT
PARAMETER
High-level output voltage
2.4
V
VOH
VOL
II
Low-level output voltage
Input current (leakage)
0.4
1
V
IOL = 2.1mA
µA
µA
µA
mA
mA
µA
VI = 0V to 5.5V
VO = 0V to VCC
VPP = VCC = 5.5V
VPP = 13V
Output current (leakage)
5
IO
VPP supply current
100
50
1
IPP1
IPP2
VPP supply current (during program pulse)2
30
15
TTL-Input Level
V
CC = 5.5V, E\=VIH
CC = 5.5V, E\=VCC
ICC1
VCC supply current (standby)
CMOS-Input Level
300
V
'27C256-12
'27C256-15
'27C256-17
'27C256-20,-25
E\=VIL, VCC=5.5V
ICC2
VCC supply current (active)
25
mA
tcycle = minimum, outputs
open
NOTES:
1. Typical values are at TA=25°C and nominal voltages.
2. This parameter has been characterized at 25°C and is not tested.
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
AS27C256
Rev. 2.0 7/06
6
AUSTIN [ AUSTIN SEMICONDUCTOR ]
