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參數資料
| 型號： | MCM32A932SG33 |
| 廠商： | MOTOROLA INC |
| 元件分類： | DRAM |
| 英文描述： | 128KB/256KB Secondary Cache Module With Tag, Valid, and Dirty for i486 Processor Systems |
| 中文描述： | 32K X 32 CACHE TAG SRAM MODULE, 25 ns, DMA112 |
| 文件頁數： | 5/12頁 |
| 文件大小： | 169K |
| 代理商： | MCM32A932SG33 |
MCM32A732/764
MCM32A832/864
MCM32A932/964
5
MOTOROLA FAST SRAM
TRUTH TABLE
(X = Don’t Care)
E
G
W
Mode
VCC Current
ISB1, ISB2
ICCA
ICCA
ICCA
Output
Cycle
H
X
X
Not Selected
High–Z
–
L
H
H
Output Disabled
High–Z
–
L
L
H
Read
Dout
High–Z
Read Cycle
L
X
L
Write
Write Cycle
NOTE: E = Exx, ET; W = Wxx, WT, WA; G = GA, GB
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply Voltage
VCC
Vin, Vout
– 0.5 to + 7.0
V
Voltage Relative to VSS For Any Pin
Except VCC
– 0.5 to VCC + 0.5
V
Output Current
Iout
PD
Tbias
TA
Tstg
±
20
mA
Power Dissipation
11.0
W
Temperature Under Bias
– 10 to + 85
°
C
Operating Temperature
0 to + 70
°
C
Storage Temperature — Plastic
– 55 to + 125
°
C
NOTE: Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are
exceeded. Functional operation should be restricted to RECOMMENDED OPER-
ATING CONDITIONS. Exposure to higher than recommended voltages for ex-
tended periods of time could affect device reliability.
DC OPERATING CONDITIONS AND CHARACTERISTICS
(VCC = 5.0 V
±
10%, TA = 0 to 70
°
C, Unless Otherwise Noted)
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Min
Typ
Max
Unit
Supply Voltage (Operating Voltage Range)
VCC
VIH
4.5
5.0
5.5
V
Input High Voltage
2.2
—
VCC + 0.3
**
V
Input Low Voltage
VIL
– 0.5
*
—
0.8
V
*VIL (min) = – 0.5 V dc; VIL (min) = – 2.0 V ac (pulse width
≤
20 ns)
**VIH (max) = VCC + 0.3 V dc; VIH (max) = VCC + 2.0 V ac (pulse width
≤
20 ns)
DC CHARACTERISTICS
Parameter
Symbol
Min
Max
Unit
Input Leakage Current (All Inputs, Vin = 0 to VCC)
Output Leakage Current (E = VIH or G = VIH, Vout = 0 to VCC)
Output High Voltage (IOH = – 4.0 mA)
Output Low Voltage (IOL = 8.0 mA)
Ilkg(I)
Ilkg(O)
VOH
VOL
—
±
10
μ
A
—
±
10
μ
A
2.4
—
V
—
0.4
V
POWER SUPPLY CURRENTS
Parameter
Symbol
32Ax32
33 MHz
32Ax64
33 MHz
Unit
AC Active Supply Current (Iout = 0 mA, VCC = Max, f = fmax)
AC Standby Current (E = VIH, VCC = Max, f = fmax)
CMOS Standby Current (VCC = Max, f = 0 MHz, E
≥
VCC – 0.2 V
Vin
≤
VSS + 0.2 V, or
≥
VCC – 0.2 V)
ICCA
ISB1
ISB2
750
1250
mA
180
300
mA
120
200
mA
This device contains circuitry to protect the
inputs against damage due to high static volt-
ages or electric fields; however, it is advised
that normal precautions be taken to avoid
application of any voltage higher than maxi-
mum rated voltages to this high–impedance
circuit.
This CMOS memory circuit has been de-
signed to meet the dc and ac specifications
shown in the tables, after thermal equilibrium
has been established. The circuit is in a test
socket or mounted on a printed circuit board
and transverse air flow of at least 500 linear
feet per minute is maintained.
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