SM802140UMG
SM802140UMG Datasheet
SM802140
| Part | Datasheet |
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SM802140UMG |
SM802140UMG (pdf) |
| PDF Datasheet Preview |
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| SM802140 ClockWorksTM 644.53125MHz LVDS Ultra-Low Jitter, Frequency Synthesizer The SM802140 is a member of the family of devices from Micrel and provides an extremely low-noise timing solution for clock signals. It is based upon a unique patented architecture that provides very low phase noise. The device operates from a 3.3V or 2.5V power supply and synthesizes four Differential LVDS clocks at 644.53125MHz The SM802140 accepts a 20.141601MHz crystal input. Data sheets and support documentation can be found on Micrel’s web site at: Generates four LVDS clocks output at 644.53125MHz 2.5V or 3.3V operating range Typical phase jitter 644MHz 1.875MHz to 20MHz 114 fs typical at 3.3V Industrial temperature range Green, RoHS, and PFOS compliant Available in 24-pin 4mm x 4mm QFN package 40GbE Serial PMD clock FPGA Transceiver clock Block Diagram ClockWorks is a trademark of Micrel, Inc RotaryWave is a registered trademark of Micrel, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 408 944-0800 • fax + 1 408 474-1000 • November 2011 M9999-012111-A or 408 955-1690 Micrel, Inc. Ordering Information Marking SM802140UMG 802140 SM802140UMGTR 802140 Note Devices are Green, RoHS, and PFOS compliant. Shipping Tube Tape and Reel Temperature Range to +85°C to +85°C Pin Configuration 24-Pin QFN Top View SM802140 Package 24-Pin QFN 24-Pin QFN Pin Description Pin Number 3, 4 16, 17 20, 21 23, 24 Pin Name /Q3, Q3 /Q0, Q0 /Q1, Q1 /Q2, Q2 VDDO2 VSSO2 Pin Type O, DIFF PLL_BYPASS I, SE 6 7, 12, 15, 19 XTAL_SEL TEST November 2011 I, SE I, SE Pin Level Pin Function LVDS Differential Clock Outputs at 644.53125MHz LVCMOS LVCMOS Power Supply for Outputs Q2 and Q3 Power Supply Ground for Outputs Q2 and Q3 Bypasses the PLL and Switches the REF_IN or XTAL Frequency to all Outputs 1 = Bypass PLL, output is XTAL or REF_IN 0 = PLL Mode, pull-down Selects PLL Reference Input Mode 0 = REF_IN, 1 = XTAL, pull-up Test Pins. Do Not Connect These Pins to Anything 2 or 408 955-1690 Micrel, Inc. SM802140 Pin Description Continued Power Supply REF_IN I, SE |
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