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843202AYIT PDF预览

843202AYIT

更新时间: 2024-11-11 20:11:07
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
15页 634K
描述
Clock Generator

843202AYIT 技术参数

是否Rohs认证: 不符合生命周期:Active
Reach Compliance Code:not_compliant风险等级:5.88
JESD-609代码:e0湿度敏感等级:3
端子面层:Tin/Lead (Sn85Pb15)Base Number Matches:1

843202AYIT 数据手册

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PRELIMINARY  
FEMTOCLOCKS™ 680MHZ, CRYSTAL-TO-3.3V  
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER  
ICS843202I  
GENERAL DESCRIPTION  
FEATURES  
The ICS843202I is a 2 output LVPECL Synthesizer  
Two 3.3V LVPECL outputs  
ICS  
HiPerClockS™  
optimized to generate Gigabit Ethernet and SONET  
reference clock fre-quencies and is a member of  
the HiPerClocksTM family of high performance clock  
solutions from ICS. Using a 19.44MHz and 25MHz,  
• Selectable crystal oscillator interface  
or one differential recovered clock inputs  
• Supports the following output frequencies: 155.52MHz  
and 156.25MHz  
18pF parallel resonant crystal, 155.52MHz and 156.25MHz  
frequencies can be generated. The part also allows the use of  
a recovered clock at QB output. The ICS843202I uses ICS’  
FemtoClockTM low phase noise VCO technology and can achieve  
1ps or lower typical RMS phase jitter. The ICS843202I is  
packaged in a 32-pin LQFP package.  
• VCO range: 560MHz - 680MHz  
• RMS phase jitter @ 155.52MHz, using a 19.44MHz crystal  
(12kHz - 13MHz): 0.86ps (typical)  
• RMS phase jitter @ 156.25MHz, using a 25MHz crystal  
(1.875MHz - 20MHz): 0.56ps (typical)  
SELBX FUNCTION TABLE  
• Full 3.3V supply mode  
Control Inputs  
Outputs  
nQB, QB  
• -40°C to 85°C ambient operating temperature  
SEL[1:0]  
• Available in both standard and lead-free RoHS  
compliant packages  
00  
01  
10  
11  
High, Low  
REC_CLK  
156.25MHz based on XTAL_0  
155.52MHz based on XTAL_1  
BLOCK DIAGRAM  
PIN ASSIGNMENT  
Pullup  
OEA  
25MHz  
XTAL_IN0  
QA  
VCO  
625MHz  
Phase  
Detector  
OSC  
÷4  
nQA  
XTAL_OUT0  
32 31 30 29 28 27 26 25  
156.25MHz  
VCCO_A  
nc  
1
2
3
4
5
6
7
8
24  
23  
22  
21  
20  
19  
18  
17  
OEA  
VCC  
÷25  
ICS843202I  
32-Lead LQFP  
7mm x 7mm x 1.4mm  
package body  
Y Package  
XTAL_IN1  
XTAL_OUT1  
nc  
VCCA  
SEL0  
VEE  
00  
01  
Pulldown  
REC_CLK  
QB  
REC_CLK  
nREC_CLK  
OEB  
VCC  
Top View  
Pullup  
nREC_CLK  
nQB  
10  
11  
SEL1  
19.44MHz  
XTALIN1  
VCCO_B  
VCO  
622.08MHz  
Phase  
Detector  
OSC  
9
10 11 12 13 14 15 16  
÷4  
XTAL_OUT1  
155.52MHz  
÷32  
Pullup  
SEL[1:0]  
Pullup  
OEB  
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.  
IDT/ ICS680MHZ, LVPECL FREQUENCY SYNTHESIZER  
1
ICS843202I REV A JULY 18, 2006  

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