Datasheet > SM803083UMG

SM803083UMG

更新时间： 2024-11-22 05:12:11

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
19页	931K
描述
IC,FREQUENCY SYNTHESIZER,LLCC,48PIN,PLASTIC

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SM803083UMG 数据手册

SM803XXX

Flexible Ultra-Low Jitter Clock Synthesizer

Clockworks™ FLEX2

General Description

Features

The SM803xxx is a dual-PLL clock generator that achieves

ultra-low phase jitter (75fs RMS). With 12 total outputs and

dividers on each output, this device can generate 12

different frequencies up to 850MHz, from a low-cost quartz

crystal or a reference clock input.

• Generates up to 12 differential or single-ended

frequencies

• 75fs phase jitter @ 156.25MHz (1.875MHz to 20MHz)

• 180fs phase jitter @ 156.25MHz (12kHz to 20MHz)

• On-chip power supply regulation for excellent power

Each of 12 outputs can be independently programmed to

LVPECL, LVDS, HCSL, or LVCMOS logic. For LVCMOS,

only the true side of the channel is used.

supply noise immunity

• Two high-performance PLL synthesizers to generate

multiple frequencies

The SM803xxx is packaged in a 48-pin QFN with up to 10

outputs, or 84-pin QFN with 12 outputs.

• Independently programmable output logic and

frequency:

− Output logic: LVPECL, LVDS, HCSL, LVCMOS

• Selectable input:

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

− Crystal: 12MHz to 50MHz

Block Diagram

− Reference input: 12MHz to 850MHz

• SPI programmable (see FLEX SPI documentation)

• No external crystal oscillator capacitors required

• 2.5V or 3.3V operating power supply

• Separate output power supplies:

− Each bank can be at different power supply voltage

levels (4 banks of 3 outputs each)

• Feedback input pins for use as zero delay buffer

• Industrial temperature range, −40°C to +85°C

• Green, RoHS, and PFOS compliant QFN packages:

− 84-pin, 7mm × 7mm (12 Diff. or Single ended outputs)

− 48-pin 7mm × 7mm (10 Diff. or Single ended outputs)

Applications

• 1/10/40/100 Gigabit Ethernet – (GbE)

• SONET/SDH

• PCI-Express

• CPRI/OBSAI – Wireless base station

• Fibre Channel

• SAS/SATA

• DIMM (DDR2/DDR3/AMB)

Clockworks and Ripple Blocker are trademarks of Micrel, 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

Revision 1.0

hbwhelp@micrel.com or (408) 955-1690

July 26, 2013

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