sm840002 Micrel Semiconductor, sm840002 Datasheet

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sm840002

Manufacturer Part Number
sm840002
Description
Clockworks Dual 10-gigabit/gigabit Ethernet 62.5mhz, 125mhz, Or 156.25mhz, Ultra-low Jitter Lvcmos Clock Frequency Synthesizer
Manufacturer
Micrel Semiconductor
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
sm840002KA
Manufacturer:
Micrel
Quantity:
753
Part Number:
sm840002KA TR
Manufacturer:
NS
Quantity:
3 282
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
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
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
November 2010
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 (
®
®
architecture that provides a very stable clock
, with improved waveform integrity, and jitter.
Features
• Generates two LVCMOS outputs
• Operating supply modes:
• Typical phase jitter @156.25MHz~64 fs
• Crystal frequency: 25MHz
• 62.5MHz, 125MHz, or 156.25MHz output frequency
• Output Skew: 12ps (maximum)
• Phase Noise @ 156.25MHz:
• Temperature range: –40°C to +75°C
• Green-, RoHS-, and PFOS-compliant
• Available in 16-pin TSSOP
Applications
• Gigabit Ethernet
• 10-Gigabit Ethernet
408
Ultra-Low Jitter LVCMOS Clock Frequency
Ethernet 62.5MHz, 125MHz, or 156.25MHz,
− Core/Output
− 3.3V/3.3V, 2.5V/2.5V
(1.875MHz − 20MHz)
− 1KHz:
− 10KHz:
− 100KHz:
− 1MHz:
− 10MHz:
− 20MHz:
ClockWorks™ Dual
) 944-0800 • fax + 1 (408) 474-1000 •
SM840002
−126dBc/Hz
−130dBc/Hz
−126dBc/Hz
−139dBc/Hz
−165dBc/Hz
−166/dBc/Hz
Synthesizer
hbwhelp@micrel.com
10-Gigabit/Gigabit
http://www.micrel.com
or (408) 955-1690
M9999-110810-A

Related parts for sm840002

sm840002 Summary of contents

Page 1

... 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 ...

Page 2

... Part Number SM840002KA (2) SM840002KA TR Notes: 1. Devices are Green-, RoHS-, and PFOS-compliant. 2. Tape and Reel. Pin Configuration November 2010 Package Type Operating Range –40°C to +75°C K-16 –40°C to +75°C K-16 16-Pin TSSOP (K-16) 2 SM840002 Package Marking 840002 840002 M9999-110810 hbwhelp@micrel.com or (408) 955-1690 ...

Page 3

... XTAL_OUT 10 XTAL_IN 11 V DDO GND 15 GND 16 F_SEL1 Configuring the SM840002 Xtal Frequency (MHz) F_SEL1 November 2010 Level Pin Function I Pull-Up Frequency Select Pin. LVCMOS interface levels. Selects between XTAL and TEST_CLK Reference Input. When HIGH, ...

Page 4

... A )(Still Air).......................................127°C/W JA Min. Typ. Max. 2.375 2.50 2.625 2.375 2.50 2.625 2.375 2.50 2.625 0 Min. Typ. Max. 3.135 3.30 3.465 3.135 3.30 3.465 3.135 3.30 3.465 0 M9999-110810 hbwhelp@micrel.com or (408) 955-1690 SM840002 Units Units ...

Page 5

... Min. Typ. 2 −0.30 =3.465V =3.465V −150 −5 2.6 1.8 Min. Typ. 156.25 125 62.5 125 0.064 0.065 0.077 100 48 50 hbwhelp@micrel.com SM840002 Max. Units 0.3 0. µA 150 µA µA µ 0.5 V Max. Units MHz MHz MHz MHz 12 ps ...

Page 6

... Shunt Capacitor, C0 Correlation Drive Level Phase Noise Plot: 62.5MHz @ 3.3V November 2010 Condition Min. 12pF Load Phase Noise Plot: 156.25MHz @ 3.3V 6 Typ. Max. Fundamental, Parallel Resonant 100 300 Phase Noise Plot: 125MHz @ 3.3V M9999-110810 hbwhelp@micrel.com or (408) 955-1690 SM840002 Units MHz Ω ...

Page 7

... Micrel, Inc. November 2010 Figure 1. Duty Cycle Timing Figure 2. All Outputs Rise/Fall Time Figure 3. RMS Phase Noise/Jitter 7 SM840002 M9999-110810 hbwhelp@micrel.com or (408) 955-1690 ...

Page 8

... Micrel, Inc. November 2010 Figure 4. LVCMOS Output Load and Test Circuit Figure 5. Crystal Input Interface 8 SM840002 M9999-110810 hbwhelp@micrel.com or (408) 955-1690 ...

Page 9

... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully November 2010 16-Pin TSSOP (K-16) indemnify Micrel for any damages resulting from such use or sale. © 2010 Micrel, Incorporated. 9 http://www.micrel.com M9999-110810 hbwhelp@micrel.com or (408) 955-1690 SM840002 nt ...

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