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參數(shù)資料
| 型號(hào)： | ST49C107ACF14-04 |
| 廠商： | EXAR CORP |
| 元件分類(lèi)： | XO, clock |
| 英文描述： | Preprogrammed CPU Mother Board Frequency Generator |
| 中文描述： | 129.96 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO14 |
| 封裝： | 0.150 INCH, SOIC-14 |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 66K |
| 代理商： | ST49C107ACF14-04 |
ST49C107A-04
Preliminary
4
Rev. P2.00
EXTERNAL CLOCK CONNECTION
To minimize the noise pickup, it is recommended to
connect 0.047 (F capacitor to XTAL1, and keep the lead
length of the capacitor to XTAL1 to a minimum to reduce
noise susceptibility.
FREQUENCY SELECT CALCULATION
The ST49C107A-04 contains an analog phase locked
loop circuit with digital closed loop dividers and a final
output multiplexer to achieve the desired dividing ratios
for the clock output.
The accuracy of the frequencies produced by the
ST49C107A-04 depends on the input frequency and
divider ratios. The formula for calculating the exact output
frequency is as follows:
CLKOUT = CLKIN * Factor
For proper output frequency, the ST49C107A-04 can
accept a reference frequency from 5 - 32MHz with max
output frequency of 130MHz (2X – clock).
CLOCK OUTPUT TABLE FOR ST49C107A-04 (using
14.318 MHz input. All frequencies in MHz).
A3
A2
A1
A0
Factor
2X-
CLOCK
80.02
CLOCK
0
0
0
0
95/17
40.01
0
0
0
1
107/23
66.62
33.31
0
0
1
0
35/10
50.11
25.06
0
0
1
1
95/34
40.01
20.00
0
1
0
0
56/8
100.23
50.11
0
1
0
1
107/46
33.31
16.66
0
1
1
0
38/17
32.01
16.00
0
1
1
1
35/20
25.06
12.47
1
0
0
0
76/17
64.02
32.01
1
0
0
1
2
2X-Input
1X-Input
1
0
1
0
3
3X-Input
1.5X-Input
1
0
1
1
8
8X-Input
4X-Input
1
1
0
0
1/2
0.5X-Input
0.25X-Input
1
1
0
1
1/4
0.25X-
Input
120.00
0.125X-
Input
60.00
1
1
1
0
109/13
1
1
1
1
118/13
129.96
64.98
Figure 2. Timing Diagram
T5
T1
T4
CLOCK
T2
2X–CLOCK
1X–CLOCK
T8
T7
BCLK
T3
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