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參數資料
| 型號： | W48C55A |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Frequency Synthesizers(頻率合成器) |
| 中文描述： | 頻率合成器（頻率合成器） |
| 文件頁數： | 5/8頁 |
| 文件大小： | 146K |
| 代理商： | W48C55A |
W48C54A/55A
5
5.0V AC Characteristics
(
0
°
C < T
A
< 70
°
C, V
DD
= 5.0V ±10%)
Parameter
Description
Conditions
Min
Typ
Max
Unit
T
ICR
T
ICF
T
R
T
R
T
F
T
F
D
T
T
JAB
F
I
T
SK
Input Clock Rise Time
20
ns
Input Clock Fall Time
20
ns
Output Rise Time, 0.8 to 2.0V
25-pF load
1
2
ns
Rise Time, 20% to 80% V
DD
Output Fall Time, 2.0 to 0.8V
25-pF load
2
4
ns
25-pF load
1
2
ns
Fall Time, 80% to 20% V
DD
Duty Cycle, All Outputs
25-pF load
2
4
ns
25-pF load
40/60
50/50
60/40
%
Jitter, Absolute
16
–
100 MHz clocks
700
ps
Input Frequency
14.318
MHz
Clock Skew between CPU and
2XCPU outputs
1.0
ns
T
FT
Frequency Transition Time
From 8
–
100 MHz
40
50
ms
3.3V DC Characteristics
(
0
°
C < T
A
< 70
°
C, V
DD
= 3.3V±10%)
Parameter
Description
V
IL
Input Low Voltage
V
IH
Input High Voltage
I
IL
I
IH
Input High Current
V
OL
Output Low Voltage
V
OH
Output High Voltage
I
DD
F
D
I
SC
Short Circuit Current
C
IN
Input Capacitance
C
L
Load Capacitance
R
P
Pull-up Resistor Value
Test Condition
V
DD
= 3.3V
V
DD
= 3.3V
V
IN
= 0V
V
IN
= V
DD
I
OL
= 4 mA
I
OH
=
–
4 mA, V
DD
=3.3V
No load
Min
Typ
Max
Unit
V
0.15*V
DD
0.7*V
DD
V
Input Low Current
[2]
–
100
μA
10
μA
0.4
V
2.4
V
Supply Current
[3]
Output Frequency Change
[4]
20
35
mA
Over supply and temperature
0.002
0.01
%
Each output clock
25
40
mA
Except pins X1, X2
10
pF
Pins X1 and X2
20
pF
k
Except X1, X2
250
3.3V AC Characteristics
(
0
°
C < T
A
< 70
°
C, V
DD
= 3.3V ±10%)
Parameter
Description
Conditions
Min
Typ
Max
Unit
T
ICR
T
ICF
T
R
T
F
D
T
T
JAB
F
I
T
SK
Input Clock Rise Time
20
ns
Input Clock Fall Time
20
ns
Rise Time, 20% to 80% V
DD
Fall Time, 80% to 20% V
DD
Duty Cycle, All Outputs
15-pF load
2
4
ns
15-pF load
2
4
ns
15-pF load
40/60
50/50
60/40
%
Jitter, Absolute
16
–
80 MHz clocks
700
ps
Input Frequency
14.318
MHz
Clock Skew between CPU and
2XCPU outputs
1.0
ns
T
FT
Frequency Transition Time
From 8
–
100 MHz
40
50
ms
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