Rainbow-electronics MAX3679A Instrukcja Użytkownika

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General Description
The MAX3679A is a low-jitter precision clock generator
with the integration of three LVPECL and one LVCMOS
outputs optimized for Ethernet applications. The device
integrates a crystal oscillator and a phase-locked loop
(PLL) clock multiplier to generate high-frequency clock
outputs for Ethernet applications.
Maxim’s proprietary PLL design features ultra-low jitter
(0.36ps
RMS
) and excellent power-supply noise rejection,
minimizing design risk for network equipment.
Applications
Ethernet Networking Equipment
Features
Crystal Oscillator Interface: 25MHz
CMOS Input: 25MHz
Output Frequencies for Ethernet
62.5MHz, 125MHz, 156.25MHz, 312.5MHz
Low Jitter
0.14ps
RMS
(1.875MHz to 20MHz)
0.36ps
RMS
(12kHz to 20MHz)
Excellent Power-Supply Noise Rejection
No External Loop Filter Capacitor Required
MAX3679A
+3.3V, Low-Jitter Crystal to LVPECL
Clock Generator
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
Typical Application Circuit
19-4858; Rev 0; 8/09
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.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
EVALUATION KIT
AVAILABLE
Pin Configuration appears at end of data sheet.
PART TEMP RANGE PIN-PACKAGE
MAX3679AETJ+ -40°C to +85°C 32 TQFN-EP*
MAX3679A
V
CCA
MR
REF_IN
IN_SEL
QA_OE
QAC_OE
QB0_OE
QB1_OE
BYPASS
SELA1
SELA0
SELB0
RES1
SELB1
RES0
QA_C
X_OUT
X_IN GNDO_AGND
V
CC
V
CCO_A
V
CCO_B
V
DDO_A
10.5Ω
0.1μF
V
CC
36Ω
Z
0
= 50Ω
ASIC
125MHz
QA
50Ω
Z
0
= 50Ω
QA
Z
0
= 50Ω
ASIC
50Ω
125MHz
(V
CC
- 2V)
QB0
50Ω
Z
0
= 50Ω
QB0
Z
0
= 50Ω
ASIC
50Ω
312.5MHz
(V
CC
- 2V)
QB1
50Ω
Z
0
= 50Ω
QB1
Z
0
= 50Ω
ASIC
50Ω
312.5MHz
(V
CC
- 2V)
10μF
25MHz
(C
L
= 18pF)
33pF 27pF
0.01μF0.1μF 0.1μF 0.1μF 0.1μF
+3.3V ±5%
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1 2 3 4 5 6 ... 10 11

Podsumowanie treści

Strona 1 - Clock Generator

General DescriptionThe MAX3679A is a low-jitter precision clock generatorwith the integration of three LVPECL and one LVCMOSoutputs optimized for Ethe

Strona 2

MAX3679A+3.3V, Low-Jitter Crystal to LVPECLClock Generator 10 ______________________________________________________________________________________M

Strona 3

MAX3679A+3.3V, Low-Jitter Crystal toLVPECL Clock Generator Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely e

Strona 4

MAX3679A+3.3V, Low-Jitter Crystal to LVPECLClock Generator 2 _______________________________________________________________________________________A

Strona 5

MAX3679A+3.3V, Low-Jitter Crystal to LVPECLClock Generator _______________________________________________________________________________________ 3E

Strona 6

MAX3679A+3.3V, Low-Jitter Crystal to LVPECLClock Generator 4 _______________________________________________________________________________________E

Strona 7

MAX3679A+3.3V, Low-Jitter Crystal to LVPECLClock Generator _______________________________________________________________________________________5NO

Strona 8

MAX3679A+3.3V, Low-Jitter Crystal to LVPECLClock Generator 6 _______________________________________________________________________________________P

Strona 9

MAX3679ADetailed DescriptionThe MAX3679A is a low-jitter clock generator designedto operate at Ethernet frequencies. It consists of an on-chip crystal

Strona 10

MAX3679A+3.3V, Low-Jitter Crystal to LVPECLClock Generator 8 _______________________________________________________________________________________C

Strona 11 - LVPECL Clock Generator

MAX3679A_______________________________________________________________________________________ 9+3.3V, Low-Jitter Crystal to LVPECLClock Generator I

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