PL607041 ClockWorks PCIe Quad Outputs Ultra-Low Jitter, HCSL Frequency Synthesizer General Description Features The PL607041 is a member of the ClockWorks family of 25MHz fundamental crystal or reference input devices from Micrel and provides an extremely low-noise Generates four HCSL clock outputs at 25MHz, 100MHz, Spread-Spectrum clock for PCI Express requirements. 125MHz, and 200MHz The device operates from a 3.3V or 2.5V power supply Spread spectrum for EMI reduction and synthesizes four HCSL output clocks at 25MHz, 2.5V or 3.3V operating range 100MHz, 125MHz, and 200MHz. The PL607041 accepts a Typical phase jitter 100MHz (1.5MHz to 10MHz): 25MHz crystal. 320fs Datasheets and support documentation are available on Compliant with PCI Express Gen1, Gen2, and Gen3 Micrels web site at: www.micrel.com. Industrial temperature range (40C to +85C) RoHS and PFOS compliant Available in 24-pin 4mm 4mm QFN package Applications Servers Storage systems Switches and routers Gigabit Ethernet Set-top boxes/DVRs Block Diagram ClockWorks is a registered trademark of Micrel, Inc. Ripple Blocker is a trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. PL607041 (1) Ordering Information Junction Temperature Part Number Marking Shipping Package Range PL607 PL607041UMG Tube 40 to +85C 24-Pin QFN 041 PL607 PL607041UMG TR Tape and Reel 40 to +85C 24-Pin QFN 041 Note: 1. Devices are RoHS and PFOS compliant. Pin Configuration 24-Pin QFN (Top View) Pin Description Pin Number Pin Name Pin Type Pin Level Pin Function 17, 18 /Q0, Q0 O, (DIF) HCSL Differential Clock Outputs pins. 19, 20 /Q1, Q1 23, 24 /Q2, Q2 O, (DIF) HCSL Differential Clock Outputs pins. 1, 2 /Q3, Q3 9 VDDO2 PWR Power Supply. 16 VDDO1 PWR Power Supply. 7, 15 VDD PWR Core Power Supply. 5, 11, 13 VSS PWR Power Supply Ground. Frequency Select for 25MHz, 100MHz, 125MHz, and 6, 8 S0, S1 I LVCMOS 200MHz. Each pin has a 45k pull-up. Spread Spectrum Select pins. Each pin has a 60k pull- 14, 4 SS0, SS1 I LVCMOS up. Crystal or Reference Input, no load caps needed (see 22 XIN/FIN I, (SE) Crystal Figure 5). 21 XOUT O, (SE) Crystal Crystal Output, no load caps needed (see Figure 5). 12 OE I, (SE) LVCMOS Output Enable/Disable. 3, 10 TEST I Factory test pins. Keep these pins floating. Revision 1.2 April 1, 2014 2 tcghelp micrel.com or (408) 955-1690