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MAX3674ECM+ 其他数据使用手册 - Microsemi（美高森美）
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Microsemi（美高森美）
分类:
时钟发生器
封装:
LQFP-48
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MAX3674ECM+数据手册
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General Description
The MAX3674 is a high-performance network clock
synthesizer IC for networking, computing, and telecom
applications. It integrates a crystal oscillator, a low-
noise phase-locked loop (PLL), programmable dividers,
and high-frequency LVPECL output buffers. The PLL
generates a high-frequency clock based on a low-fre-
quency reference clock provided by the on-chip crystal
oscillator or an external LVCMOS clock. The MAX3674
has excellent period jitter, cycle-to-cycle jitter, and sup-
ply noise rejection performance. With output frequen-
cies programmable from 21.25MHz to 1360MHz and
support of two differential PECL output signals, the
device provides a versatile solution for the most
demanding clock applications.
Programming is accomplished through a 2-wire I
2
C bus
or parallel interface that can change the output fre-
quency on demand for frequency margining. Both
LVPECL outputs have synchronous stop functionality,
and the PLL has a LOCK indicator output. The
MAX3674 operates from a +3.3V supply and typically
consumes 396mW. The device is packaged in a 48-pin
LQFP, and the operating temperature range is from
-40°C to +85°C.
Applications
Ethernet Network ASIC Clock Generation
Storage Area Network ASIC Clocking
Optical Network ASIC Clocking
Programmable Clock Source for Server, Comput-
ing, or Communication Systems
Frequency Margining
Features
♦ 21.25MHz to 1360MHz Programmable PLL Synthe-
sized Output Clocks
♦ Two Differential LVPECL-Compatible Outputs
♦ Cycle-to-Cycle Jitter 1.6ps RMS and Period Jitter
0.9ps RMS at 500MHz
♦ On-Chip Crystal Oscillator or Selectable
LVCMOS-Compatible Reference Clock Input
♦ Excellent Power-Supply Noise Rejection
♦ Parallel or 2-Wire I
2
C Programming Interface
♦ Lock Indicator Output
♦ +3.3V Power Supply
♦ Power Consumption: 396mW at 3.3V
♦ 48-Pin LQFP Pb-Free Package
♦ -40°C to +85°C Temperature Range
MAX3674
High-Performance, Dual-Output,
Network Clock Synthesizer
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
MAX3674
REF_CLK
XTAL1
XTAL2
SDA
SCL
M[9:0]
NA[2:0]
NB
P
QA
QA
QB
QB
CLK_STOPA
CLK_STOPB
BYPASS
PLOAD
MR GND LOCK
16MHz
SERIAL I
2
C
INTERFACE
PARALLEL
INTERFACE
PLL DIVIDER
CONTROLS
REF_SEL
+3.3V
+3.3V
V
CC
+3.3V
V
CC_PLL
+3.3V
Z = 50Ω
130Ω
82Ω
LVPECL
OUTPUTS
+3.3V
NETWORK
ASIC
Typical Application Circuit
19-2483; Rev 0; 12/07
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-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
PART TEMP RANGE PIN-PACKAGE
MAX3674ECM+ -40°C to +85°C 48 LQFP
E V A L U A T I O N K I T A V A I L A B L E
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