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參數資料
| 型號： | W48C111-17 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 100-MHz Mobile Motherboard System Clock(100-MHz 移動主板系統時鐘) |
| 中文描述： | 100兆赫移動主板的系統時鐘（100兆赫移動主板系統時鐘） |
| 文件頁數： | 6/7頁 |
| 文件大?。?/td> | 114K |
| 代理商： | W48C111-17 |
W48C111-17
PRELIMINARY
6
Document #:38-00843
REF Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
f
Description
Test Condition/Comments
Frequency generated by crystal oscillator
CPU = 66.6/100 MHz
Unit
MHz
Min.
Typ.
14.318
Max.
Frequency, Actual
t
R
t
F
t
D
f
ST
Output Rise Edge Rate
Measured from 0.4V to 2.4V
0.5
2
V/ns
Output Fall Edge Rate
Measured from 2.4V to 0.4V
0.5
2
V/ns
Duty Cycle
Measured on rising and falling edge at 1.5V
45
55
%
Frequency Stabilization from
Power-up (cold start)
Assumes full supply voltage reached within 1 ms
from power-up. Short cycles exist prior to
frequency stabilization.
3
ms
Z
o
AC Output Impedance
Average value during switching transition. Used for
determining series termination value.
40
48-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
Description
Test Condition/Comments
CPU = 66.6/100 MHz
Min.
Typ.
Unit
Max.
f
Frequency, Actual
Determined by PLL divider ratio (see m/n below)
48.008
MHz
f
D
m/n
Deviation from 48 MHz
(48.008
–
48)/48
+167
ppm
PLL Ratio
(14.31818 MHz x 57/17 = 48.008 MHz)
57/17
t
R
t
F
t
D
f
ST
Output Rise Edge Rate
Measured from 0.4V to 2.4V
0.5
2
V/ns
Output Fall Edge Rate
Measured from 2.4V to 0.4V
0.5
2
V/ns
Duty Cycle
Measured on rising and falling edge at 1.5V
45
55
%
Frequency Stabilization
from Power-up (cold start)
Assumes full supply voltage reached within 1 ms
from power-up. Short cycles exist prior to fre-
quency stabilization.
3
ms
Z
o
AC Output Impedance
Average value during switching transition. Used
for determining series termination value.
40
Ordering Information
Ordering Code
W48C111
Freq. Mask
Code
-17
Package
Name
H
Package Type
28-pin SSOP (209 mils)
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PDF描述 |
|---|---|
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W48C20 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Audio Subsystem Clock Generator |
| W48C20-08G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Miscellaneous Clock Generator |
| W48C2102GT | 制造商:ICWORKS 功能描述:New |
| W48C54A-05G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| W48C54A-09G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
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