Rainbow-electronics MAX3629 Bedienungsanleitung

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MAX3629
+3.3V, Low-Jitter, Precision Clock Generator
with Multiple Outputs
________________________________________________________________
Maxim Integrated Products
1
19-4467; Rev 0; 2/09
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.
General Description
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.
Maxim’s proprietary PLL design features ultra-low jitter
(0.4ps
RMS
) and excellent power-supply noise rejection
(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.
Applications
Ethernet Networking Equipment
Features
Crystal Oscillator Interface: 25MHz
OSC_IN Interface:
PLL Enabled: 25MHz
PLL Disabled: 20MHz to 320MHz
Outputs:
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)
Low Phase Jitter: 0.4ps
RMS
(12kHz to 20MHz)
Excellent PSNR
Operating Temperature Range: 0°C to +70°C
THIN QFN-EP
(5mm
× 5mm)
TOP VIEW
29
30
28
27
12
11
13
Q0
Q1
Q1
V
DDO_DIFF
Q2
14
Q0
V
DDO_SE
GND
Q6
RESERVED
V
DDO_SE
Q5
12
FSELA
4567
2324 22 20 19 18
OSC_IN
X_IN
Q4
Q4
V
DDO_DIFF
Q3
GND
Q7
3
21
31
10
X_OUT
Q3
32
9
GND
GND
V
DD
26
15
RESERVED
PLL_BP
25
16
FSELB
Q2
GND
8
17
V
DDA
+
*EP
*EXPOSED PAD CONNECTED TO GROUND.
MAX3629
Pin Configuration
Ordering Information
V
DDA
OSC_IN
FSELA
GND, OPEN, OR V
DD
FSELB
GND, OPEN, OR V
DD
GND
PLL_BP
X_OUT
V
DDO_SE
V
DDO_DIFF
V
DD
33pF
X_IN
27pF
25MHz
(C
L
= 18pF)
33Ω
10.5Ω
0.1μF
+3.3V ±5%
Q0
100Ω
Z
0
= 50Ω
Q0
Z
0
= 50Ω
125MHz/156.25MHz/
312.5MHz
125MHz/156.25MHz/
312.5MHz
ASIC
Q1
100Ω
125MHz/156.25MHz/
312.5MHz
Z
0
= 50Ω
Q1
Z
0
= 50Ω
ASIC
Q2
100Ω
125MHz/156.25MHz/
312.5MHz
Z
0
= 50Ω
Q2
Z
0
= 50Ω
ASIC
Q3
100Ω
125MHz/156.25MHz/
312.5MHz
Z
0
= 50Ω
Q3
Z
0
= 50Ω
ASIC
Q4
100Ω
Z
0
= 50Ω
Q4
Z
0
= 50Ω
ASIC
Q5
Z
0
= 50Ω
125MHz/156.25MHz
33Ω
Q6
Z
0
= 50Ω
125MHz/156.25MHz
ASIC
ASIC
33Ω
Q7
Z
0
= 50Ω
125MHz/156.25MHz
ASIC
0.1μF0.1μF
0.01μF
10μF
V
DD
MAX3629
Typical Operating Circuit
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
PART TEMP RANGE PIN-PACKAGE
MAX3629CTJ+ 0°C to +70°C 32 TQFN-EP*
Seitenansicht 0
1 2 3 4 5 6 ... 11 12

Inhaltsverzeichnis

Seite 1 - *EP = Exposed pad

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs________________________________________________________________Maxim Integrat

Seite 2 - ELECTRICAL CHARACTERISTICS

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs10 ___________________________________________________________________________

Seite 3

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs______________________________________________________________________________

Seite 4

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple OutputsMaxim cannot assume responsibility for use of any circuitry other than circuit

Seite 5

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs2 ____________________________________________________________________________

Seite 6 - = +3.3V, T

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs______________________________________________________________________________

Seite 7

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs4 ____________________________________________________________________________

Seite 8 - Pin Description

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs______________________________________________________________________________

Seite 9 - Figure 3. Functional Diagram

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs6 ____________________________________________________________________________

Seite 10 - Applications Information

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs______________________________________________________________________________

Seite 11 - Crystal Selection

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs8 ____________________________________________________________________________

Seite 12 - Package Information

MAX3629+3.3V, Low-Jitter, Precision Clock Generatorwith Multiple Outputs______________________________________________________________________________

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