參數(shù)資料
型號(hào): SM840002KA
廠商: Micrel Inc
文件頁數(shù): 1/9頁
文件大?。?/td> 0K
描述: IC CLK SYNTHESIZER LN 16-TSSOP
產(chǎn)品培訓(xùn)模塊: High Bandwidth Product Overview
標(biāo)準(zhǔn)包裝: 94
系列: ClockWorks™, RotaryWave™
類型: 時(shí)鐘/頻率合成器,多路復(fù)用器
PLL:
主要目的: 以太網(wǎng)
輸入: 晶體
輸出: LVCMOS
電路數(shù): 1
比率 - 輸入:輸出: 1:2
差分 - 輸入:輸出: 無/無
頻率 - 最大: 156.25MHz
電源電壓: 2.375 V ~ 3.465 V
工作溫度: -40°C ~ 75°C
安裝類型: 表面貼裝
封裝/外殼: 16-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 16-TSSOP
包裝: 管件
其它名稱: 576-3769-5
SM840002
ClockWorks
Dual 10-Gigabit/Gigabit
Ethernet 62.5MHz, 125MHz, or 156.25MHz,
Ultra-Low Jitter LVCMOS Clock Frequency
Synthesizer
ClockWorks is a trademark of Micrel, Inc.
RotaryWave is a registered trademark of Multigig, Inc.
FemtoClocks is a registered trademark of IDT, Inc.
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (
408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
November 2010
M9999-110810-A
hbwhelp@micrel.com or (408) 955-1690
General Description
The SM840002 is a dual 10-Gigabit Ethernet and Gigabit
Ethernet, 62.5MHz, 125MHz, or 156.25MHz LVCMOS
clock frequency synthesizer and a member of the
ClockWorks
family of devices from Micrel. It provides a
low-noise timing solution for high-speed, high-accuracy
synthesis of clock signals. It includes a patented
RotaryWave
architecture that provides a very stable clock
with very-low noise.
Power supplies of either 2.5V or 3.3V are supported, with
superior jitter and phase-noise performance. The device
synthesizes a 62.5MHz, 125MHz, or 156.25MHz, low-
noise LVCMOS output pair for Ethernet applications. The
crystal reference frequency is 25MHz.
The SM840002 is an excellent replacement for IDT
FemtoClocks
, with improved waveform integrity, and jitter.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
Generates two LVCMOS outputs
Operating supply modes:
Core/Output
3.3V/3.3V, 2.5V/2.5V
Typical phase jitter @156.25MHz~64 fs
(1.875MHz
20MHz)
Crystal frequency: 25MHz
62.5MHz, 125MHz, or 156.25MHz output frequency
Output Skew: 12ps (maximum)
Phase Noise @ 156.25MHz:
1KHz:
126dBc/Hz
10KHz:
130dBc/Hz
100KHz:
126dBc/Hz
1MHz:
139dBc/Hz
10MHz:
165dBc/Hz
20MHz:
166/dBc/Hz
Temperature range: –40°C to +75°C
Green-, RoHS-, and PFOS-compliant
Available in 16-pin TSSOP
Applications
Gigabit Ethernet
10-Gigabit Ethernet
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