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參數(shù)資料
| 型號(hào)： | CYM1840 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 256K x 32 Static RAM Module(256K x 32 靜態(tài)RAM模塊) |
| 中文描述： | 256K × 32靜態(tài)RAM模塊（256K × 32靜態(tài)內(nèi)存模塊） |
| 文件頁(yè)數(shù)： | 2/7頁(yè) |
| 文件大小： | 123K |
| 代理商： | CYM1840 |
CYM1840
2
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature .................................–65
°
C to +150
°
C
Ambient Temperature with
Power Applied (PD) ......................................–10
°
C to +85
°
C
DC Voltage Applied to Outputs
in High Z State................................................–0.5V to +7.0V
DC Input Voltage ............................................–3.0V to +7.0V
Operating Range
Range
Ambient
Temperature
0
°
C to +70
°
C
V
CC
Commercial
5V
±
10%
lectrical Characteristics
Over the Operating Range
CYM1840
Min.
2.4
Parameter
V
OH
V
OL
V
IH
V
IL
I
IX
I
OZ
I
CC
I
SB1
Description
Test Conditions
Max.
Unit
V
V
V
V
μ
A
μ
A
mA
mA
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Input Load Current
Output Leakage Current
V
CC
Operating Supply Current
Automatic CS
Power-Down Current
[1]
Automatic CS
Power-Down Current
[1]
V
CC
= Min., I
OH
= –4.0 mA
V
CC
= Min., I
OL
= 8.0 mA
0.4
V
CC
0.8
+20
+50
1120
320
2.2
–0.5
–20
–50
GND < V
I
< V
CC
GND < V
O
< V
CC
, Output Disabled
V
CC
= Max., I
OUT
= 0 mA, CS
X
< V
IL
Max. V
CC
, CS
X
> V
IH
,
Min. Duty Cycle = 100%
Max. V
CC
, CS
X
> V
CC
- 0.3V,
V
IN
> V
CC
- 0.3V or V
IN
< 0.3V
I
SB2
160
mA
Capacitance
[2]
Parameter
C
INA
C
INB
C
OUT
Notes:
1.
A pull-up resistor to V
on the CS input is required to keep the device deselected during V
CC
power-up, otherwise I
SB
will exceed values given.
2.
Tested initially and after any design or process changes that may affect these parameters.
Description
Test Conditions
T
A
= 25
°
C, f = 1 MHz,
V
CC
= 5.0V
Max.
100
30
30
Unit
pF
pF
pF
Input Capacitance, Address Pins
Input Capacitance, I/O Pins
Output Capacitance
AC Test Loads and Waveforms
1838–3
1838–4
90%
10%
3.0V
GND
90%
10%
ALL INPUT PULSES
5V
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
(a)
(b)
< 5 ns
< 5 ns
OUTPUT
R1 481
R1 481
R2
255
R2
255
125
Equivalent to:
TEVENINEQUIVALENT
1.90V
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