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ICS84025 PDF预览

ICS84025

更新时间: 2024-11-14 04:58:15
品牌 Logo 应用领域
矽成 - ICSI /
页数 文件大小 规格书
12页 144K
描述
CRYSTAL-TO-LVCMOS / LVTTL FREQUENCY SYNTHESIZER WITH FANOUT BUFFER

ICS84025 数据手册

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PRELIMINARY  
ICS84025  
Integrated  
Circuit  
Systems, Incꢀ  
CRYSTAL-TO-LVCMOS / LVTTL  
FREQUENCY SYNTHESIZER WITH FANOUT BUFFER  
GENERAL DESCRIPTION  
FEATURES  
The ICS84025 is a Crystal-to-LVCMOS/LVTTL 6 LVCMOS/LVTTLoutputs  
Frequency Synthesizer with Fanout Buffer and  
a member of the HiPerClockS™ family of High  
Performance Clock Solutions from ICS. The  
VCO frequency is programmed in steps equal  
Crystal oscillator interface  
HiPerClockS™  
Output frequency range: 53.125MHz to 125MHz  
Crystal input frequency: 25MHz and 25.5MHz  
to the value of the crystal frequency. The VCO and  
output frequency can be programmed using the feedback and  
output frequency select pins. The low phase noise character-  
istics of the ICS84025 make it an ideal clock source for Fibre  
Channel 1 and Gigabit Ethernet applications.  
RMS phase jitter at 106.25, using a 25.5MHz crystal  
(637KHz to 10MHz): 3.25ps  
Phase noise:  
Offset  
Noise Power  
100Hz ................. -100 dBc/Hz  
1KHz ................. -115 dBc/Hz  
10KHz ................. -125 dBc/Hz  
100KHz ................. -127 dBc/Hz  
FUNCTION TABLE  
Inputs  
XTAL  
Output Frequency  
F_OUT  
MR F_SEL1 F_SEL0  
3.3V core, outputs may either be 3.3V, 2.5V or 1.8V  
0°C to 70°C ambient operating temperature  
1
0
0
0
0
X
0
0
1
1
X
0
1
0
1
LOW  
25.5MHz  
25.5MHz  
25MHz  
53.125MHz  
106.25MHz  
62.5MHz  
Industrial temperature information available upon request  
25MHz  
125MHz  
BLOCK DIAGRAM  
PIN ASSIGNMENT  
VDDO  
Q0  
GND  
Q1  
VDDO  
Q2  
GND  
Q3  
VDDO  
Q4  
GND  
Q5  
1
2
3
4
24  
23  
22  
21  
20  
19  
18  
F_SEL0  
F_SEL1  
MR  
XTAL1  
XTAL2  
GND  
VDDA  
VDD  
PLL_SEL  
GND  
XTAL1  
OSC  
XTAL2  
0
Output  
Divider  
6
/
5
6
Q0:Q5  
1
7
PLL  
8
9
10  
11  
12  
17  
16  
15  
14  
13  
nc  
VDDO  
Feedback  
Divider  
ICS84025  
24-Lead, 300-MIL SOIC  
7.5mm x 15.33mm x 2.3mm body package  
M Package  
Top View  
F_SEL1  
PLL_SEL MR F_SEL0  
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.  
84025EM  
www.icst.com/products/hiperclocks.html  
REV. A APRIL 16, 2003  
1

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