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參數(shù)資料
| 型號： | AV9107C-11 |
| 英文描述： | Green PC CPU Frequency Generator |
| 中文描述： | 綠色電腦CPU頻率發(fā)生器 |
| 文件頁數(shù)： | 5/9頁 |
| 文件大小： | 504K |
| 代理商： | AV9107C-11 |
5
AV9107C
Frequency Accuracy and Calculation
The accuracy of the frequencies produced by the
AV9107C-
07
depends on the input frequency and the desired actual
output frequency. The formula for calculating the exact
frequency is as follows:
For example, to calculate the actual output frequency for a
video monitor expecting a 44.900 MHz clock and using a
14.318 MHz input clock, the closest A/B ratio is 69/22,
which gives an output of 44.906 MHz (within 0.02% of the
target frequency). Generally, the
AV9107C-07
can produce
frequencies within 0.1% of the desired output.
Output Frequency = Input Frequency
∞
where
A=2, 3, 4 ... 128, and
B=2, 3, 4 ... 32.
A
B
Allowable Input and Output
Frequencies for Possible Options
The input frequency should be between 2 and 32 MHz,
depending on options, and the A/B ratio should not exceed
24. The output should fall in the range of 2-120 MHz,
depending on options.
Output Enable
The Output Enable feature tristates the specified output
clock pins. This places the selected output pins in a high
impedance state to allow for system level diagnostic testing.
Power-Down
If equipped, the power-down shuts off the specified PLL or
entire chip to save current. A few milliseconds are required
to reach full functioning speed from a power-down state.
Slow Clock
If equipped, the Slow Clock forces a smooth frequency
transition on the VCO to an 8 MHz output on CLK1 when
Slow Clock is taken to logic low level. A few milliseconds
are required for the frequency transition into and out of the
Slow Clock Mode.
Frequency Transitions
A key
AV9107C-07
feature is the ability to provide glitch-
free frequency transitions across its output frequency range.
The
AV9107C-07-03
provides smooth transitions between
any of the two groups of eight frequencies (when FS3=0 or
FS3=1), so that the device will switch glitch-free between
4-100 MHz and 2-50 MHz.
Absolute Maximum Ratings
AVDD, VDD referenced to GND ...........................................................................................................................................7V
Operating temperature under bias ........................................................................................................................0°C to +70°C
Storage temperature ......................................................................................................................................... -65°C to +150°C
Voltage on I/O pins referenced to GND........................................................................................ GND -0.5V to VDD +0.5V
Power dissipation .......................................................................................................................................................... 0.5 Watts
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions above those indicated in the operational sections of
the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product
reliability.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AV9107C-11CN14 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| AV9107C-11CS14 | 制造商:ICS 制造商全稱:ICS 功能描述:CPU Frequency Generator |
| AV9107C-13 | 制造商:ICS 制造商全稱:ICS 功能描述:CPU Frequency Generator |
| AV9107C-13CS08 | 制造商:ICS 制造商全稱:ICS 功能描述:CPU Frequency Generator |
| AV9107C-14CN08 | 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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