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參數(shù)資料
| 型號(hào)： | W312-02 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | FTG for VIA K7 Series Chipset with Programmable Output Frequency |
| 中文描述： | 威盛K7系列芯片組FTG具有可編程輸出頻率 |
| 文件頁數(shù)： | 19/21頁 |
| 文件大小： | 143K |
| 代理商： | W312-02 |
W312-02
Document #: 38-07259 Rev. *B
Page 19 of 21
24-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
Description
f
Frequency, Actual
f
D
Deviation from 24 MHz
m/n
PLL Ratio
t
R
Output Rise Edge Rate
t
F
Output Fall Edge Rate
t
D
Duty Cycle
f
ST
Frequency Stabilization
from Power-up (cold start)
Test Condition/Comments
Determined by PLL divider ratio (see m/n below)
(24.004
–
24)/24
(14.31818 MHz x 57/34 = 24.004 MHz)
Measured from 0.4V to 2.4V
Measured from 2.4V to 0.4V
Measured on rising and falling edge at 1.5V
Assumes full supply voltage reached within 1 ms
from power-up. Short cycles exist prior to fre-
quency stabilization.
Average value during switching transition. Used
for determining series termination value.
Min.
Typ.
24.004
+167
57/34
Max.
Unit
MHz
ppm
0.5
0.5
45
2
2
V/ns
V/ns
%
ms
55
3
Z
o
AC Output Impedance
40
Clock Chip
CPUDriver
1.5V
R1
68
Z0 = 52
T2
”
Z0 = 52
Length = 5
”
T1
R8
47
CPUCLK_T
VDD
3.3
+
-
V1
Z0 = 52
T5
”
Z0 = 52
Length = 5
”
T4
R9
47
20p
20p
CPUCLK_C
1.5V
R3
68
Figure 1. K7 Open Drain Clock Driver Test Circuit
相關(guān)PDF資料 |
PDF描述 |
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| W312-02H | FTG for VIA K7 Series Chipset with Programmable Output Frequency |
| W312-02HT | FTG for VIA K7 Series Chipset with Programmable Output Frequency |
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| W320-04H | 200-MHz Spread Spectrum Clock Synthesizer/Driver with Differential CPU Outputs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W312-02_05 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:FTG for VIA⑩ K7 Series Chipset with Programmable Output Frequency |
| W312-02H | 制造商:Rochester Electronics LLC 功能描述:PROGRAMMABLE OVERCLOCK SOLUTION FOR VIA KT266 - Bulk |
| W312-02HT | 制造商:Rochester Electronics LLC 功能描述:TIMING DEVICE - Bulk |
| W3120SMRC | 制造商:Winslow Adaptics Ltd 功能描述:20 way dual in line surface mount socket |
| W3120TRC | 制造商:Winslow Adaptics Ltd 功能描述:20way low profile DIL socket,0.3in pitch |
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