- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄360770 > ICS8431CM-01 200MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER PDF資料下載
參數(shù)資料
| 型號： | ICS8431CM-01 |
| 英文描述： | 200MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER |
| 中文描述： | 200MHz的，低抖動LVPECL的頻率合成器 |
| 文件頁數(shù)： | 6/11頁 |
| 文件大?。?/td> | 2083K |
| 代理商： | ICS8431CM-01 |
ICS8431CM-01
www.icst.com/products/hiperclocks.html
REV. A JUNE 5, 2001
6
ICS8431-01
200MH
Z
, L
OW
J
ITTER
,
LVPECL F
REQUENCY
S
YNTHESIZER
C
RYSTAL
I
NPUT
AND
O
SCILLATOR
I
NTERFACE
The ICS8431-01 features an internal oscillator that uses an
external quartz crystal as the source of its reference frequency.
A 16.666 MHz crystal divided by 16 before being sent to the phase
detector provides the reference frequency. The oscillator is a
series resonant, multi-vibrator type design. This design provides
better stability and eliminates the need for large on chip capacitors.
Though a series resonant crystal is preferred, a parallel resonant
crystal can be used. A parallel resonant mode crystal used in a
series resonant circuit will exhibit a frequency of oscillation a few
hundred ppm lower than specified. A few hundred ppm translates
to KHz inaccuracy. In general computing applications this level
of inaccuracy is irrelevant. If better ppm accuracy is required, an
external capacitor can be added to a parallel resonant crystal in
series to pin 25. Figure 1Ashows how to interface with a crystal.
Figures 1A, 1B, and 1C show various crystal parameters
which are recommended only as guidelines. Figure 1A shows
how to interface a capacitor with a parallel resonant crystal.
Figure 1B shows the capacitor value needed for the optimum
PPM performance over various parallel resonant crystals.
Figure 1C shows the recommended tuning capacitance for a
16.666MHz parallel resonant crystal.
Quartz Crystal Selection:
(1) Raltron Series Resonant: AS-16.66-S-SMD-T-MI
(2) Raltron Parallel Resonant: AS-16.66-18-SMD-T-MI
F
IGURE
1A. C
RYSTAL
I
NTERFACE
Optional
XTAL2
(Pin 26, SOIC)
XTAL1
(Pin 25, SOIC)
ICS8431-01
F
IGURE
1B.
Recommended tuning capacitance for various parallel
resonant crystals.
F
IGURE
1C.
Recommended tuning capacitance for 16.666MHz
parallel resonant crystal.
14.318
15.000
16.667
24.000
19.440
20.000
0
10
20
30
40
50
60
14
15
16
17
18
19
20
21
22
23
24
25
Crystal Frequency (MHz)
S
16.666MHz
-100
-80
-60
-40
-20
0
20
40
60
80
100
0
10
20
30
40
50
60
Series Capacitor, C1 (pF)
F
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS8431CM-01T | 200MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER |
| ICS8431CM-11 | 255MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER |
| ICS8431CM-11T | 255MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER |
| ICS843101-312 | FEMTOCLOCKS⑩ CRYSTAL-TO-LVPECL 312.5MHZ FREQUENCY MARGINING SYNTHESIZER |
| ICS843101AG-312 | FEMTOCLOCKS⑩ CRYSTAL-TO-LVPECL 312.5MHZ FREQUENCY MARGINING SYNTHESIZER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS8431CM-01T | 制造商:ICS 制造商全稱:ICS 功能描述:200MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER |
| ICS8431CM-11 | 制造商:ICS 制造商全稱:ICS 功能描述:255MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER |
| ICS8431CM-11T | 制造商:ICS 制造商全稱:ICS 功能描述:255MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER |
| ICS8431EM11 | 制造商:ICS 功能描述: |
| ICS8431I-21 | 制造商:ICS 制造商全稱:ICS 功能描述:350MHZ, LOW JITTER, CRYSTAL OSCILLATOR-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。