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ICS8430252CG-45T PDF预览

ICS8430252CG-45T

更新时间: 2024-11-02 02:56:35
品牌 Logo 应用领域
矽成 - ICSI 晶体外围集成电路光电二极管时钟
页数 文件大小 规格书
13页 162K
描述
FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER

ICS8430252CG-45T 数据手册

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PRELIMINARY  
ICS8430252-45  
Integrated  
Circuit  
Systems, Inc.  
FEMTOCLOCKS™ C RYSTAL-TO-3.3V LVPECL  
FREQUENCY SYNTHESIZER  
GENERAL DESCRIPTION  
FEATURES  
The ICS8430252-45 is a 2 output LVPECL and  
• One differential 3.3V LVPECL output and  
One LVCMOS/LVTTL output  
ICS  
LVCMOS/LVTTL Synthesizer optimized to gen-  
erate Ethernet reference clock frequencies and  
is a member of the HiPerClocksfamily of high  
performance clock solutions from ICS. Using a  
HiPerClockS™  
• Crystal oscillator interface designed for a 25MHz,  
18pF parallel resonant crystal  
25MHz, 18pF parallel resonant crystal, the following fre-  
quencies can be generated: 156.25MHz LVPECL output  
and, 125MHz LVCMOS output. The 8430252-45 uses ICS’  
3rd generation low phase noise VCO technology and can  
achieve 1ps or lower typical rms phase jitter, easily meet-  
ing Ethernet jitter requirements. The ICS8430252-45 is  
packaged in a small 16-pin TSSOP package.  
• A 25MHz crystal generates both an output frequency of  
156.25MHz (LVPECL) and 125MHz (LVCMOS)  
• VCO frequency: 625MHz  
• RMS phase jitter @ 156.25MHz (1.875MHz - 20MHz) using  
a 25MHz crystal: 0.39ps (typical)  
• Full 3.3V supply mode  
• 0°C to 70°C ambient operating temperature  
• Industrial temperature available upon request  
• Available in both standard and lead-free RoHS compliant  
packages  
BLOCK DIAGRAM  
PIN ASSIGNMENT  
Pullup  
OE  
1
2
3
4
5
6
7
8
OE  
VEE  
QA  
16  
15  
14  
13  
12  
11  
10  
9
CLK_EN  
VEE  
QB  
25MHz  
QA  
÷5  
÷4  
XTAL_IN  
Phase  
Detector  
VCO  
OSC  
VCCO_A  
nc  
nc  
VCCA  
VCC  
nQB  
625MHz  
VCCO_B  
XTAL_IN  
XTAL_OUT  
VEE  
QB  
XTAL_OUT  
nQB  
Feedback Divider  
÷25  
Pullup  
CLK_EN  
ICS8430252-45  
16-LeadTSSOP  
4.4mm x 5.0mm x 0.92mm  
package body  
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.  
8430252CG-45  
www.icst.com/products/hiperclocks.html  
REV.B DECEMBER 9, 2005  
1

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