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參數(shù)資料
| 型號： | AS27C256-20ECAM |
| 廠商： | AUSTIN SEMICONDUCTOR INC |
| 元件分類： | PROM |
| 英文描述： | 32K X 8 UVPROM, 200 ns, CQCC32 |
| 封裝： | 0.450 X 0.550 INCH, CERAMIC, LCC-32 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 286K |
| 代理商： | AS27C256-20ECAM |
UVEPROM
AS27C256
AS27C256
Rev. 2.0 7/06
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
6
Austin Semiconductor, Inc.
*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.
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
RECOMMENDED OPERATING CONDITIONS
NOTES:
1. V
CC 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 V
PP or VCC is applied.
2. V
PP can be connected to VCC directly (except in the program mode).
V
CC supply current in this case would be ICC2 + IPP1.
ELECTRICAL CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE
AND OPERATING FREE-AIR TEMPERATURE
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.
TEST CONDITIONS
MIN
TYP
1
MAX
UNIT
VOH
IOH = -400A
2.4
V
VOL
IOL = 2.1mA
0.4
V
II
VI = 0V to 5.5V
±1
A
IO
VO = 0V to VCC
±5
A
IPP1
VPP = VCC = 5.5V
100
A
IPP2
VPP = 13V
30
50
mA
TTL-Input Level
VCC = 5.5V, E\=VIH
1mA
CMOS-Input Level
VCC = 5.5V, E\=VCC
300
A
ICC2
VCC supply current (active)
'27C256-12
'27C256-15
'27C256-17
'27C256-20,-25
E\=VIL, VCC=5.5V
tcycle = minimum, outputs
open
15
25
mA
PARAMETER
ICC1
VCC supply current (standby)
High-level output voltage
Low-level output voltage
Input current (leakage)
VPP supply current
Output current (leakage)
VPP supply current (during program pulse)
2
MIN
TYP
MAX
4.5
5
5.5
6
6.25
6.5
VCC-0.6
12.5
12.75
13
TTL inputs
2.2
VCC+.6
CMOS inputs
VCC-0.2
VCC+.6
TTL inputs
-0.5
0.8
CMOS inputs
-0.5
0.2
VID
11.5
12
12.5
TA
-55
TC
+125
VCC
Read Mode
1
FLASHRITE Pulse programming algorithm
Supply Voltage
Read Mode
2
FLASHRITE Pulse programming algorithm
VPP
High-level input voltage
VIH
Supply Voltage
VIL
Low-level input voltage
Operating free-air temperature
Operating case temperature
Voltage level on A9 for signature mode
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