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MAX3629

更新时间: 2024-11-09 05:49:03
品牌 Logo 应用领域
美信 - MAXIM 时钟发生器
页数 文件大小 规格书
12页 532K
描述
+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs

MAX3629 数据手册

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19-4467; Rev 0; 2/09  
+3.3V, Low-Jitter, Precision Clock Generator  
with Multiple Outputs  
MAX3629  
General Description  
Features  
The MAX3629 is a low-jitter precision clock generator  
optimized for network applications. The device inte-  
grates a crystal oscillator and a phase-locked loop  
(PLL) to generate high-frequency clock outputs for  
Ethernet applications.  
Crystal Oscillator Interface: 25MHz  
OSC_IN Interface:  
PLL Enabled: 25MHz  
PLL Disabled: 20MHz to 320MHz  
Outputs:  
Maxim’s proprietary PLL design features ultra-low jitter  
One LVDS Output at 125MHz/156.25MHz/  
312.5MHz (Selectable with FSELA)  
Four LVDS Outputs at 125MHz/156.25MHz/  
312.5MHz (Selectable with FSELB)  
Three LVCMOS Outputs at 125MHz/156.25MHz  
(Selectable with FSELB)  
(0.4ps  
) and excellent power-supply noise rejection  
RMS  
(PSNR), minimizing design risk for network equipment.  
The MAX3629 contains five LVDS outputs and three  
LVCMOS outputs. The output frequencies are selec-  
table among 125MHz, 156.25MHz, and 312.5MHz by  
pin control.  
Low Phase Jitter: 0.4ps  
Excellent PSNR  
(12kHz to 20MHz)  
RMS  
Applications  
Ethernet Networking Equipment  
Operating Temperature Range: 0°C to +70°C  
Typical Operating Circuit  
Ordering Information  
+3.3V 5%  
PART  
TEMP RANGE  
PIN-PACKAGE  
0.1μF  
0.1μF  
0.1μF  
MAX3629CTJ+  
0°C to +70°C  
32 TQFN-EP*  
10.5Ω  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
V
V
V
DDO_SE  
DD  
DDO_DIFF  
10μF  
Q0  
Z = 50Ω  
0
V
DDA  
125MHz/156.25MHz/  
312.5MHz  
100Ω  
100Ω  
100Ω  
100Ω  
100Ω  
ASIC  
ASIC  
ASIC  
ASIC  
ASIC  
ASIC  
ASIC  
ASIC  
0.01μF  
Q0  
Q1  
Z
= 50Ω  
0
Pin Configuration  
OSC_IN  
Z
= 50Ω  
0
125MHz/156.25MHz/  
312.5MHz  
MAX3629  
TOP VIEW  
Q1  
Q2  
Z
0
= 50Ω  
33pF  
X_OUT  
X_IN  
Z
= 50Ω  
0
25MHz  
(C = 18pF)  
24 23 22 21 20 19 18 17  
125MHz/156.25MHz/  
312.5MHz  
L
16  
15  
V
DDA  
25  
FSELB  
Q2  
Q3  
Z
0
= 50Ω  
27pF  
RESERVED  
PLL_BP 26  
V
Z
= 50Ω  
0
125MHz/156.25MHz/  
312.5MHz  
14 Q4  
27  
28  
29  
30  
31  
32  
DD  
V
DD  
PLL_BP  
Q3  
Q4  
Z
0
= 50Ω  
FSELA  
Q4  
V
13  
12  
MAX3629  
OSC_IN  
X_IN  
Z
0
= 50Ω  
DDO_DIFF  
125MHz/156.25MHz/  
312.5MHz  
11 Q3  
Q4  
Q5  
Z = 50Ω  
0
GND, OPEN, OR V  
GND, OPEN, OR V  
FSELA  
FSELB  
DD  
*EP  
10  
9
Q3  
X_OUT  
GND  
+
GND  
125MHz/156.25MHz  
= 50Ω  
33Ω  
33Ω  
33Ω  
DD  
Z
0
1
2
3
4
5
6
7
8
125MHz/156.25MHz  
= 50Ω  
GND  
Q6  
Q7  
Z
0
THIN QFN-EP  
(5mm × 5mm)  
125MHz/156.25MHz  
= 50Ω  
Z
0
*EXPOSED PAD CONNECTED TO GROUND.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  

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