Rainbow-electronics MAX3627 Manual de usuario Pagina 1

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MAX3627
+3.3V, Low-Jitter, Precision Clock
Generator with Multiple Outputs
________________________________________________________________
Maxim Integrated Products
1
19-4567; Rev 0; 4/09
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.
EVALUATION KIT
AVAILABLE
General Description
The MAX3627 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 MAX3627 contains seven LVDS outputs and one
LVCMOS output. The output frequencies are selectable
among 125MHz, 156.25MHz, and 312.5MHz.
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)
Six LVDS Outputs at 125MHz/156.25MHz/
312.5MHz (Selectable with FSELB)
One LVCMOS Output at 125MHz/156.25MHz
(Selectable with FSELB)
Low Phase Jitter
0.4ps
RMS
(12kHz to 20MHz)
0.2ps
RMS
(1.875MHz to 20MHz)
Excellent PSNR: -64dBc at 156.25MHz with
40mV
P-P
Supply Noise at 100kHz
Operating Temperature Range: 0°C to +70°C
THIN QFN
(5mm × 5mm)
TOP VIEW
29
30
28
27
12
11
13
Q0
Q1
Q1
V
DDO_DIFF
Q2
14
Q0
Q7
Q6
Q6
GND
V
DDO_DIFF
Q5
12
FSELA
4567
2324 22 20 19 18
OSC_IN
X_IN
Q4
Q4
V
DDO_DIFF
Q3
GND
V
DDO_SE
3
21
31
10
X_OUT
Q3
32
9
GND
GND
V
DDA
26
15
FSELB
PLL_BP
25
16
OE
Q2
8
17
V
DD
+
Q5
*EP
*EXPOSED PAD CONNECTED TO GROUND.
MAX3627
Pin Configuration
Ordering Information
V
DDA
OSC_IN
OEOPEN
OPEN
GND
PLL_BP
FSELAGND, OPEN, OR V
DD
FSELBGND, OPEN, OR V
DD
X_OUT
V
DDO_SE
V
DDO_DIFF
V
DD
33pF
X_IN
27pF
25MHz
(C
L
= 18pF)
10.5Ω
0.1μF
+3.3V ±5%
Q0
100Ω
Z
0
= 50Ω
Q0
Z
0
= 50Ω
125MHz/156MHz/312.5MHz
125MHz/156MHz/312.5MHz
ASIC
Q1
100Ω
125MHz/156MHz/312.5MHz
Z
0
= 50Ω
Q1
Z
0
= 50Ω
ASIC
Q2
100Ω
125MHz/156MHz/312.5MHz
Z
0
= 50Ω
Q2
Z
0
= 50Ω
ASIC
Q3
100Ω
125MHz/156MHz/312.5MHz
Z
0
= 50Ω
Q3
Z
0
= 50Ω
ASIC
Q4
100Ω
125MHz/156MHz/312.5MHz
Z
0
= 50Ω
Q4
Z
0
= 50Ω
ASIC
100Ω
125MHz/156MHz/312.5MHz
Z
0
= 50Ω
Q5
Z
0
= 50Ω
Q5
ASIC
100Ω
Z
0
= 50Ω
Q6
Z
0
= 50Ω
Q6
ASIC
33Ω
Q7
Z
0
= 50Ω
125MHz/156.25MHz
ASIC
0.1μF0.1μF
0.01μF
10μF
V
DD
MAX3627
Typical Operating Circuit
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
PART TEMP RANGE PIN-PACKAGE
MAX3627CTJ+ 0°C to +70°C 32 TQFN-EP*
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Indice de contenidos

Pagina 1 - EP = Exposed pad

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs________________________________________________________________Maxim Integra

Pagina 2 - ELECTRICAL CHARACTERISTICS

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs10 __________________________________________________________________________

Pagina 3

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple OutputsMaxim cannot assume responsibility for use of any circuitry other than circui

Pagina 4

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs2 ___________________________________________________________________________

Pagina 5 - MAX3627 toc02

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs_____________________________________________________________________________

Pagina 6

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs4 ___________________________________________________________________________

Pagina 7 - Pin Description

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs_____________________________________________________________________________

Pagina 8 - Figure 3. Functional Diagram

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs6 ___________________________________________________________________________

Pagina 9 - Applications Information

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs_____________________________________________________________________________

Pagina 10 - Crystal Selection

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs8 ___________________________________________________________________________

Pagina 11 - Package Information

MAX3627+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs_____________________________________________________________________________

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