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ICS844071AGI

更新时间: 2024-11-05 11:14:43
品牌 Logo 应用领域
矽成 - ICSI 时钟发生器
页数 文件大小 规格书
10页 167K
描述
FEMTOCLOCKS? CRYSTAL-TO- LVDS CLOCK GENERATOR

ICS844071AGI 数据手册

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PRELIMINARY  
ICS844071I  
Integrated  
Circuit  
Systems, Inc.  
FEMTOCLOCKS™ C RYSTAL-TO- LVDS  
CLOCK GENERATOR  
GENERAL DESCRIPTION  
FEATURES  
(1) Differential LVDS output  
The ICS844071I is a Serial ATA (SATA)/Serial  
ICS  
Attached SCSI (SAS) Clock Generator and a  
member of the HiPerClocksTM family of high  
performance devices from ICS.The ICS844071I  
uses an 18pF parallel resonant crystal over the  
HiPerClockS™  
Crystal oscillator interface, 18pF parallel resonant crystal  
(20.833MHz - 28.3MHz)  
Output frequency range: 62.5MHz - 170MHz  
VCO range: 500MHz - 680MHz  
range of 20.833MHz - 28.3MHz. For SATA/SAS applications,  
a 25MHz crystal is used and either 75MHz or 150MHz may  
be selected with the FREQ_SEL pin. The ICS844071I has  
excellent <1ps phase jitter performance, over the 12kHz -  
20MHz integration range. The ICS844071I is packaged in a  
small 8-pin TSSOP, making it ideal for use in systems with  
limited board space.  
RMS phase jitter @ 150MHz, using a 25MHz crystal  
(12kHz - 20MHz): 0.75ps (typical)  
3.3V or 2.5V operating supply  
-40°C to 85°C ambient operating temperature  
Replaces ICS844051-11  
COMMON CONFIGURATION TABLE  
Inputs  
Output Frequency  
Multiplication Value  
M/N  
(MHz)  
Crystal Frequency (MHz) FREQ_SEL  
M
N
25  
0
1
0
1
0
1
24  
24  
24  
24  
24  
24  
4
8
4
8
4
8
6
3
6
3
6
3
150  
75  
25  
26.041666  
26.041666  
26.5625  
26.5625  
156.25  
78.125  
159.375  
79.675  
BLOCK DIAGRAM  
PIN ASSIGNMENT  
Pullup  
FREQ_SEL  
VDDA  
VDD  
1
2
3
4
8
7
6
5
GND  
Q
XTAL_OUT  
XTAL_IN  
nQ  
FREQ_SEL  
N
÷4  
÷8  
XTAL_IN  
OSC  
XTAL_OUT  
Q
VCO  
Phase  
Detector  
FREQ_SEL  
0
1
500MHz - 680MHz  
nQ  
ICS844071I  
8-Lead TSSOP  
4.40mm x 3.0mm x 0.925mm  
package body  
M = ÷24 (fixed)  
G Package  
TopView  
The Preliminary Information presented herein represents a product in prototyping or pre-production.The noted characteristics are based on initial  
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.  
844071AGI  
www.icst.com/products/hiperclocks.html  
REV. A JULY 13, 2005  
1

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