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843256AGILF PDF预览

843256AGILF

更新时间: 2024-11-03 19:53:55
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
13页 222K
描述
Clock Generator

843256AGILF 技术参数

是否Rohs认证: 符合生命周期:Obsolete
包装说明:,Reach Compliance Code:compliant
风险等级:5.84Base Number Matches:1

843256AGILF 数据手册

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PRELIMINARY  
ICS843256I  
Integrated  
Circuit  
Systems, Inc.  
FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL  
FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER  
GENERAL DESCRIPTION  
FEATURES  
The ICS843256I is a Crystal-to-3.3V LVPECL Six LVPECL outputs  
ICS  
HiPerClockS™  
Clock Synthesizer/Fanout Buffer designed for  
Crystal oscillator interface  
Fibre Channel and Gigabit Ethernet applications  
and is a member of the HiperClockS™ family of  
High Performance Clock Solutions from ICS.The  
Output frequency range: 53.125MHz to 333.3333MHz  
Crystal input frequency range: 25MHz to 33.333MHz  
output frequency can be set using the frequency select  
pins and a 25MHz crystal for Ethernet frequencies, or a  
19.44MHz crystal for SONET. The low phase noise charac-  
teristics of the ICS843256I make it an ideal clock for these  
demanding applications.  
RMS phase jitter at 125MHz, using a 25MHz crystal  
(1.875MHz to 20MHz): 0.33ps (typical)  
Full 3.3V or 3.3V core, 2.5V output supply mode  
-40°C to 85°C ambient operating temperature  
Available in both standard and lead-free RoHS-compliant  
packages  
SELECT FUNCTION TABLE  
Inputs  
Function  
FB_SEL N_SEL1 N_SEL0 M Divide N Divide  
M/N  
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
25  
25  
25  
25  
32  
32  
32  
32  
1
2
4
5
1
2
4
8
25  
12.5  
6.25  
5
32  
16  
8
4
BLOCK DIAGRAM  
PIN ASSIGNMENT  
VCCO  
VCCO  
1
24  
23  
22  
Q3  
Q0  
2
nQ3  
3
nQ2  
Q4  
nQ0  
4
Q2  
nQ1  
Q1  
nQ0  
nQ4  
Q5  
nQ5  
N_SEL1  
VEE  
21  
20  
19  
18  
17  
16  
15  
14  
13  
Pullup  
PLL_BYPASS  
5
6
7
Q1  
1
0
nQ1  
Q0  
8
9
10  
11  
12  
Output  
Divider  
PLL_BYPASS  
VCCA  
VEE  
XTAL_IN  
OSC  
PLL  
Q2  
N_SEL0  
XTAL_OUT  
XTAL_IN  
VCC  
FB_SEL  
XTAL_OUT  
nQ2  
ICS843256I  
24-Lead, 300-MIL SOIC  
7.5mm x 15.33mm x 2.3mm  
body package  
Q3  
Feedback  
Divider  
nQ3  
M Package  
Top View  
Pulldown  
Pullup  
Q4  
FB_SEL  
N_SEL1  
nQ4  
24-Lead TSSOP  
4.40mm x 7.8mm x 0.92mm  
body package  
Pullup  
N_SEL0  
Q5  
G Package  
Top View  
nQ5  
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.  
843256AMI  
www.icst.com/products/hiperclocks.html  
REV.A JUNE 16, 2006  
1

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