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8R45252AKILFT PDF预览

8R45252AKILFT

更新时间: 2024-01-14 14:57:37
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
20页 274K
描述
FemtoClock Crystal-to-CML Clock Generator

8R45252AKILFT 数据手册

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FemtoClock® Crystal-to-CML Clock  
Generator  
8R45252I  
Data Sheet  
General Description  
Features  
The 8R45252I is a 3.3V,2.5V CML clock generator designed for  
Ethernet applications. The device synthesizes either a 50MHz,  
62.5MHz, 100MHz, 125MHz, 156.25MHz, 250MHz or 312.5MHz  
clock signal with excellent phase jitter performance. The clock signal  
is distributed to two low-skew differential CML outputs. The device is  
suitable for driving the reference clocks of Ethernet PHYs. The  
device supports 3.3V and 2.5V voltage supply and is packaged in a  
small, lead-free (RoHS 6) 32-lead VFQFN package. The extended  
temperature range supports telecommunication, wireless  
infrastructure and networking end equipment requirements. The  
device is a member of the family of High Performance Clock  
Solutions from IDT.  
Clock generation of: 50MHz, 62.5MHz, 100MHz, 125MHz,  
156.25MHz, 250MHz and 312.5MHz  
Two differential CML clock output pairs  
Crystal interface designed for 25MHz,  
18pF parallel resonant crystal  
RMS phase jitter @ 125MHz, using a 25MHz crystal  
(1.875MHz – 20MHz): 400fs (typical), 3.3V  
Offset  
Noise Power  
100Hz.................... -102.4 dBc/Hz  
1kHz.................... -119.4 dBc/Hz  
10kHz................... -124.8 dBc/Hz  
100kHz................... -125.7 dBc/Hz  
LVCMOS interface levels for the control inputs  
Full 3.3V and 2.5V supply voltage  
Available in lead-free (RoHS 6) 32 VFQFN package  
-40°C to 85°C ambient operating temperature  
Block Diagram  
Pin Assignment  
XTAL_IN  
Q0  
nQ0  
0
32 31 30 29 28 27 26 25  
0
OSC  
÷2 (default),  
1
2
3
4
5
6
7
8
nQ0  
nc  
24  
23  
22  
21  
VCO  
490-680  
÷4,  
÷5,  
Phase  
1
Q0  
nc  
f
REF  
Pulldown  
VDD  
REF_SEL  
XTAL_OUT  
REF_CLK  
REF_SEL  
1
nOE  
nc  
FSEL1  
Pulldown  
÷20,  
÷25 (default)  
20 FSEL0  
nc  
19  
nc  
nc  
nc  
Pulldown  
Pullup  
VDD  
nc  
18  
17  
Pulldown, Pulldown  
Pulldown  
9
10 11 12 13 14 15 16  
8R45252I  
32 lead VFQFN  
5.0mm x 5.0mm x 0.925mm package body  
K Package  
Top View  
©2016 Integrated Device Technology, Inc  
1
Revision A January 29, 2016  

8R45252AKILFT 替代型号

型号 品牌 替代类型 描述 数据表
8R45252AKILF IDT

完全替代

FemtoClock Crystal-to-CML Clock Generator

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