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參數(shù)資料
| 型號(hào)： | 8R256SRV0203C25 |
| 廠商： | WHITE ELECTRONIC DESIGNS CORP |
| 元件分類： | SRAM |
| 英文描述： | 16M X 16 MULTI DEVICE SRAM CARD, 250 ns, XMA68 |
| 封裝： | CARD-68 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 340K |
| 代理商： | 8R256SRV0203C25 |
6
White Electronic Designs Corporation (602) 437-1520 www.whiteedc.com
White Electronic Designs
SRV01-SRV04
February 2007
Rev. 2
Absolute Maximum Ratings2
Operating Temperature TA (ambient)
Commercial
0°C to +60 °C
Industrial
-40°C to +85 °C
Storage Temperature
Commercial
0°C to +60 °C
Industrial
-40°C to +85 °C
Voltage on any pin relative to VSS
-0.5V to VCC+0.5V (1)
VCC supply Voltage relative to VSS
-0.5V to +7.0V
Notes:
1. During transitions, inputs may undershoot to -2.0V or overshoot to VCC +2.0V for
periods less than 20ns.
2. Stress greater than those listed under “Absolute Maximum ratings” may cause
permanent damage to the device. This is a stress rating only and functional operation
at these or any other conditions greater than those indicated in the operational
sections of this specication is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
DC CHARACTERISTICS1
CMOS Test Conditions: VIL = VSS ± 0.2V, VIH = VCC ± 0.2V
Sym
Parameter
Density
Notes
Min
Typ(3)
Max
Units
Test Conditions
ICC
VCC Active Current
64KB
1
90
180
mA
VCC = 5.25V
tcycle = 150ns
128KB
90
180
256KB
90
180
512KB
90
180
1MB to 8MB
110
190
ICCS
VCC Standby Current
All
2,4
< 0.1
< 1
10
mA
VCC = 5.25V
Control Signals = VCC
ILI
Input Leakage Current
All
5,6
±20
μAVCC = VCC MAX
VIN =VCC or VSS
ILO
Output Leakage Current
All
6
±20
μAVCC = VCC MAX
VOUT =VCC or VSS
VIL
Input Low Voltage
All
6
0
0.8
V
VIH
Input High Voltage
All
6
3.85
VCC +0.5
V
VOL
Output Low Voltage
All
6
0.4
V
IOL = 3.2mA
VOH
Output High Voltage
All
6
VCC- 0.4
VCC
VIOH = -2.0mA
Notes:
1. All currents are for x16 mode and are RMS values unless otherwise specied.
2. Control Signals: CE1#, CE2#, OE#, WE#, REG#.
3. Typical: VCC = 5V, T = +25C.
4. ICCS includes battery recharge current. Value depends on battery discharge level. ICCS min is specied for fully charged battery.
ICCS typical value is specied for battery discharge to 2.7V. ICCS max is specied for a fully discharged battery (0V). Battery will recharge to 1.5V in 20 sec.
5. Values are the same for byte and word wide modes for all card densities.
6. Exceptions: Leakage currents on CE1#, CE2#, OE#, REG# and WE# will be < 500 μA when VIN = GND due to internal pull-up resistors
BATTERY CHARACTERISTICS
SRA11-14
SRA01-04
Parameter
Density
Notes
Type I
Type II
Units
Conditions
Battery Life
All
(1)
min 10
years
Normal operation, T=25C
Battery
Backup Time
256KB
(2)
-
24
60
months
(typical)
T=25C
512KB, 1MB
32
18
45
Battery backup time is a calculated value and is not
guaranteed. This should not be used to schedule battery
recharging.
2MB
22
12
30
4MB
12
7
17
6MB
12
7
17
8MB
-
12
Notes:
1. Battery Life refers to functional lifetime of battery.
2. Battery backup time is density and temperature dependent.
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