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參數資料
| 型號： | ICS8431-11 |
| 英文描述： | 255MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER |
| 中文描述： | 255MHZ，低抖動LVPECL的頻率合成器 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 2083K |
| 代理商： | ICS8431-11 |
ICS8431CM-01
www.icst.com/products/hiperclocks.html
REV. A JUNE 5, 2001
1
ICS8431-01
200MH
Z
, L
OW
J
ITTER
,
LVPECL F
REQUENCY
S
YNTHESIZER
XTAL1
XTAL2
SSC_CTL0
SSC_CTL1
G
ENERAL
D
ESCRIPTION
The ICS8431-01 is a general purpose clock
frequency synthesizer for IA64/32 application and
a member of the HiPerClockS family of High
Performance Clock Solutions from ICS. The
ICS8431-01 consists of one independent low
bandwidth PLL timing channel. A 16.666MHz crystal is used
as the input to the on-chip oscillator. The M is configured to
produce a fixed output frequency of 200MHz.
Programmable features of the ICS8431-01 support four
operational modes. The four modes are spread spectrum
clocking (SSC), non-spread spectrum clock and two test
modes which are controlled by the SSC_CTL[1:0] pins. Un-
like other synthesizers, the ICS8431-01 can immediately
change spread-spectrum operation without having to reset
the device.
In SSC mode, the output clock is modulated in order to
achieve a reduction in EMI. In one of the PLL bypass test
modes, the PLL is disconnected as the source to the
differential output allowing an external source to be
connnected to the TEST_I/O pin. This is useful for in-
circuit testing and allows the differential output to be driven
at a lower frequency throughout the system clock tree. In the
other PLL bypass mode, the oscillator divider is used as the
source to both the M and the Fout divide by 2. This is useful
for characterizing the oscillator and internal dividers.
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
F
EATURES
Fully integrated PLL
Differential 3.3V LVPECL output
200MHz output frequency
48% to 52% duty cycle
Crystal oscillator interface
Spread Spectrum Clocking (SSC) fixed at 1/2% modulation
for environments requiring ultra low EMI. Typical10dB EMI
reduction can be achieved with spread spectrum modulation
LVTTL / LVCMOS control inputs
PLL bypass modes supporting in-circuit testing and on-chip
functional block characterization
28 lead SOIC
RMS cycle-to-cycle jitter of 2ps
Typical cycle-to-cycle jitter of 18ps
0° to 85°C ambiant operating temperature
PLL
FOUT
nFOUT
÷
16
nc
nc
nc
nc
nc
nc
nc
nc
nc
SSC_CTL0
SSC_CTL1
VEE
TEST_I/O
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
nc
VDDI
XTAL2
XTAL1
nc
nc
VDDA
VEE
RESERVED
nc
VDDO
FOUT
nFOUT
VEE
ICS8431-01
28-Lead SOIC
M Package
Top View
TEST_I/O
OSC
VCO
÷
2
PHASE
DETECTOR
÷
M
SSC
Control
Logic
HiPerClockS
相關PDF資料 |
PDF描述 |
|---|---|
| ICS8431-21 | 350MHZ, LOW JITTER, CRYSTAL OSCILLATOR-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS8431AM-21 | 350MHZ, LOW JITTER, CRYSTAL OSCILLATOR-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS8431AM-21LF | 350MHZ, LOW JITTER, CRYSTAL OSCILLATOR-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS8431AM-21LFT | 350MHZ, LOW JITTER, CRYSTAL OSCILLATOR-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS8431AM-21T | 350MHZ, LOW JITTER, CRYSTAL OSCILLATOR-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ICS8431-21 | 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 |
| ICS84314 | 制造商:ICS 制造商全稱:ICS 功能描述:350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| ICS84314-02 | 制造商:ICS 制造商全稱:ICS 功能描述:700MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| ICS84314A02L | 制造商:ICS 制造商全稱:ICS 功能描述:700MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| ICS84314AY | 制造商:ICS 制造商全稱:ICS 功能描述:350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
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