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ICS844246BGIL PDF预览

ICS844246BGIL

更新时间: 2024-11-06 03:58:31
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
16页 327K
描述
FEMTOCLOCKS⑩ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER

ICS844246BGIL 数据手册

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PRELIMINARY  
FEMTOCLOCKS™ CRYSTAL-TO-LVDS  
FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER  
ICS844246I  
GENERAL DESCRIPTION  
FEATURES  
The ICS844246I is a Crystal-to-LVDS Clock  
Six LVDS outputs  
ICS  
HiPerClockS™  
Synthesizer/Fanout Buffer designed for Fibre  
Channel and Gigabit Ethernet applications and is  
a member of the HiperClockS™ family of High  
Performance Clock Solutions from IDT. The output  
Crystal oscillator interface  
Output frequency range: 53.125MHz to 333.3333MHz  
Crystal input frequency range: 25MHz to 33.333MHz  
frequency can be set using the frequency select pins and a  
25MHz crystal for Ethernet frequencies, or a 26.5625MHz  
crystal for a Fibre Channel. The low phase noise character-  
istics of the ICS844246I make it an ideal clock for these  
RMS phase jitter at 125MHz, using a 25MHz crystal  
(1.875MHz to 20MHz): 0.39ps (typical)  
Full 3.3V or 3.3V core, 2.5V output supply mode  
-40°C to 85°C ambient operating temperature  
demanding applications.  
Available in both standard (RoHS 5) and lead-free (RoHS 6)  
packages  
SELECT FUNCTION TABLE  
Inputs  
Function  
FB_SEL N_SEL1 N_SEL0 M Divide N Divide  
M/N  
10  
5
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
20  
20  
20  
20  
24  
24  
24  
24  
2
4
5
4
8
2.5  
8
3
4
6
6
4
12  
2
BLOCK DIAGRAM  
PIN ASSIGNMENT  
Q0  
VDDO  
1
24  
23  
22  
Q3  
2
3
VDDO  
nQ2  
nQ3  
Q4  
nQ0  
Pullup  
PLL_BYPASS  
4
Q2  
nQ1  
Q1  
nQ0  
nQ4  
Q5  
nQ5  
N_SEL1  
GND  
21  
20  
19  
18  
17  
16  
15  
14  
13  
5
6
7
8
Q1  
1
nQ1  
Q0  
Output  
Divider  
XTAL_IN  
9
PLL_BYPASS  
VDDA  
GND  
OSC  
PLL  
Q2  
0
10  
11  
12  
N_SEL0  
XTAL_OUT  
XTAL_IN  
XTAL_OUT  
VDD  
FB_SEL  
nQ2  
Q3  
Feedback  
Divider  
ICS844246I  
24-Lead TSSOP, E-Pad  
4.40mm x 7.8mm x 0.90mm  
body package  
nQ3  
Pulldown  
FB_SEL  
Q4  
G Package  
Top View  
Pullup  
nQ4  
N_SEL1  
Pullup  
N_SEL0  
Q5  
nQ5  
The Preliminary Information presented herein represents a product in pre-production.The noted characteristics are based on initial product characterization  
and/or qualification.Integrated DeviceTechnology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.  
IDT/ ICSLVDS FREQUENCY SYNTHESIZER W/FANOUT BUFFER  
1
ICS844246BGI REV. A NOVEMBER 14, 2007  

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