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參數資料
| 型號： | MAX9450_07 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Precision Clock Generators with Integrated VCXO |
| 中文描述： | 高精度時鐘發生器集成壓控 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 323K |
| 代理商： | MAX9450_07 |
General Description
The MAX9450/MAX9451/MAX9452 clock generators
provide high-precision clocks for timing in SONET/SDH
systems or Gigabit Ethernet systems. The MAX9450/
MAX9451/MAX9452 can also provide clocks for the high-
speed and high-resolution ADCs and DACs in 3G base
stations. Additionally, the devices can also be used as a
jitter attenuator for generating high-precision CLK signals.
The MAX9450/MAX9451/MAX9452 feature an integrated
VCXO. This configuration eliminates the use of an exter-
nal VCXO and provides a cost-effective solution for gen-
erating high-precision clocks. The MAX9450/MAX9451/
MAX9452 feature two differential inputs and clock out-
puts. The inputs accept LVPECL, LVDS, differential sig-
nals, and LVCMOS. The input reference clocks range
from 8kHz to 500MHz.
The MAX9450/MAX9451/MAX9452 offer LVPECL, HSTL,
and LVDS outputs, respectively. The output range is up
to 160MHz, depending on the selection of crystal. The
input and output frequency selection is implemented
through the I
2
C or SPI interface. The MAX9450/
MAX9451/MAX9452 feature clock output jitter less than
0.8ps RMS (in a 12kHz to 20MHz band) and phase-
noise attenuation greater than -130dBc/Hz at 100kHz.
The phase-locked loop (PLL) filter can be set externally,
and the filter bandwidth can vary from 1Hz to 20kHz.
The MAX9450/MAX9451/MAX9452 feature an input
clock monitor with a hitless switch. When a failure is
detected at the selected reference clock, the device
can switch to the other reference clock. The reaction to
the recovery of the failed reference clock can be
revertive or nonrevertive. If both reference clocks fail,
the PLL retains its nominal frequency within a range of
±20ppm at +25°C.
The MAX9450/MAX9451/MAX9452 operate from 2.4V to
3.6V supply and are available in 32-pin TQFP packages
with exposed pads.
Applications
SONET/SDH Systems
10 Gigabit Network Routers and Switches
3G Cellular Phone Base Stations
General Jitter Attenuation
Features
Integrated VCXO Provides a Cost-Effective
Solution for High-Precision Clocks
8kHz to 500MHz Input Frequency Range
15MHz to 160MHz Output Frequency Range
I
2
C or SPI Programming for the Input and Output
Frequency Selection
PLL Lock Range > ±60ppm
Two Differential Outputs with Three Types of
Signaling: LVPECL, LVDS, or HSTL
Input Clock Monitor with Hitless Switch
Internal Holdover Function within ±20ppm of the
Nominal Frequency
Low Output CLK Jitter: < 0.8ps RMS in the 12kHz
to 20MHz Band
Low Phase Noise > -130dBc at 100kHz, > -140dBc
at 1MHz
Ordering Information
M
High-Precision Clock Generators
with Integrated VCXO
________________________________________________________________
Maxim Integrated Products
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.
1
19-0547; Rev 3; 11/07
Note:
All devices are specified over the -40°C to +85°C
temperature range.
For lead-free packages, contact factory.
*
EP = Exposed paddle.
PART
PIN-PACKAGE
32 TQFP-EP*
32 TQFP-EP*
32 TQFP-EP*
OUTPUT
LVPECL
HSTL
LVDS
PKG CODE
H32E-6
H32E-6
H32E-6
MAX9450
EHJ
MAX9451
EHJ
MAX9452
EHJ
MAX9450
MAX9451
MAX9452
TQFP
(5mm x 5mm)
TOP VIEW
EXPOSED PAD
(GND)
24
20
21
22
23
17
18
19
C
C
G
C
V
D
C
V
D
O
2
5
7
6
8
3
4
1
S
I
I
I
V
D
9
10
11
12
13
14
15
AD1
16
AD0
SDA
SCL
MR
INT
26
27
28
29
30
31
32
RJ
GNDA
LP2
LP1
V
DDA
X2
X1
25
V
DD
S
L
I
GND/CS
CMON
Pin Configuration
SPI is a trademark of Motorola, Inc.
EVALUATION KIT
AVAILABLE
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|---|---|
| MAX9451EHJ | High-Precision Clock Generators with Integrated VCXO |
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| MAX9471 | Multiple-Output Clock Generators with Dual PLLs and OTP |
| MAX9471ETP | Multiple-Output Clock Generators with Dual PLLs and OTP |
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| MAX9450EHJ | 功能描述:時鐘發生器及支持產品 Not Available From Mouser RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MAX9450EHJ+ | 功能描述:時鐘發生器及支持產品 High-Precision Clock Generator RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MAX9450EHJ+T | 功能描述:時鐘發生器及支持產品 High-Precision Clock Generator RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MAX9450EHJ-T | 功能描述:時鐘發生器及支持產品 High-Precision Clock Generator RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MAX9450EVKIT | 制造商:Microsemi Corporation 功能描述:MAX9450 Evaluation Kit 制造商:Microsemi Corporation 功能描述:MAX9450 EVALUATION KIT - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:KIT EVALUATION MAX MAX9450 制造商:Microsemi Corporation 功能描述:KIT EVALUATION MAX MAX9450 |
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