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ICS840004AGI-01LLF PDF预览

ICS840004AGI-01LLF

更新时间: 2024-11-14 02:54:43
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
16页 320K
描述
FEMTOCLOCKS⑩ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER

ICS840004AGI-01LLF 数据手册

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ICS840004I-01  
FEMTOCLOCKS™ C RYSTAL-TO-  
LVCMOS/LVTTL FREQUENCY SYNTHESIZER  
GENERAL DESCRIPTION  
FEATURES  
• Four LVCMOS/LVTTL outputs,  
The ICS840004I-01 is a 4 output LVCMOS/LVTTL  
ICS  
17Ω typical output impedance  
Synthesizer optimized to generate Ethernet  
reference clock frequencies and is a member of  
the HiPerClocksTM family of high performance  
clock solutions from IDT. Using a 25MHz, 18pF  
HiPerClockS™  
• Selectable crystal oscillator interface  
or LVCMOS single-ended input  
• Supports the following output frequencies: 156.25MHz,  
125MHz and 62.5MHz  
parallel resonant crystal, the following frequencies can be  
generated based on the 2 frequency select pins (F_SEL1:0):  
156.25MHz, 125MHz, and 62.5MHz.The ICS840004I-01 uses  
IDTs 3rd generation low phase noise VCO technology and can  
achieve 1ps or lower typical random rms phase jitter, easily  
meeting Ethernet jitter requirements. The ICS840004I-01 is  
packaged in a small 20-pin TSSOP package.  
• VCO range: 560MHz - 700MHz  
• RMS phase jitter @ 156.25MHZ (1.875MHz - 20MHz):  
0.52ps (typical)  
• Output supply modes:  
Core/Output  
3.3V/3.3V  
3.3V/2.5V  
2.5V/2.5V  
• -40°C to 85°C ambient operating temperature  
Available in both standard (RoHS 5) and lead-free RoHS  
(6) packages  
FREQUENCY SELECT FUNCTION TABLE  
Inputs  
M Divider N Divider  
Value  
Output Frequency (MHz)  
(25MHz Ref.)  
M/N  
Ratio Value  
F_SEL1 F_SEL0  
Value  
0
0
1
1
0
1
0
1
25  
4
6.25  
156.25  
125  
25  
25  
25  
5
10  
5
5
2.5  
5
62.5  
125 (default)  
BLOCK DIAGRAM  
PIN ASSIGNMENT  
Pullup  
OE  
1
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
F_SEL1  
GND  
Q0  
F_SEL0  
nc  
2
3
4
5
6
7
8
9
2
Pullup:Pullup  
F_SEL1:0  
nXTAL_SEL  
REF_CLK  
OE  
MR  
nPLL_SEL  
VDDA  
Q1  
VDDO  
Q2  
Q3  
GND  
XTAL_IN  
XTAL_OUT  
Pulldown  
nPLL_SEL  
Pulldown  
nXTAL_SEL  
25MHz  
XTAL_IN  
nc  
VDD  
F_SEL1:0  
N
0
Q0  
Q1  
10  
OSC  
1
0 0 ÷4  
XTAL_OUT  
Pulldown  
ICS840004I-01  
20-Lead TSSOP  
6.5mm x 4.4mm x 0.92mm  
package body  
0 1 ÷5  
Phase  
Detector  
1
REF_CLK  
VCO  
0
1 0 ÷10  
1 1 ÷5 (default)  
Q2  
Q3  
G Package  
Top View  
M = ÷25 (fixed)  
Pulldown  
MR  
840004AGI-01  
1
REV.A OCTOBER 22, 2007  

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