XRK32510

www.DataSheet4U.com xr OCTOBER 2005 XRK32510 3.3V PHASE-LOCK LOOP CLOCK DRIVER WITH 10 CLOCK OUTPUTS REV. 1.0.1 GENERAL DESCRIPTION The XRK32510 is a high performance, low jitter, low skew clock driver. The XRK32510 uses phase-lock loop (PLL) tecnology to synthesize the CLK_IN signal into 10 output signals (QA), synchronized in both phase and frequency. XRK32510 features low skew, low jitter and 50% duty cycle making it a perfect fit in dual in line memory module (DIMM) board clocking, PC133 SDRAM designs and other server applications. The 10 outputs can be disabled using the Output Enable (OE) pin. By connecting the Feedback Output (FB_OUT) signal to the Feedback Input (FB_IN) signal, the propagation delay from CLK_IN to the 10 buffered Outputs is nearly zero. FIGURE 1. BLOCK DIAGRAM OF THE XRK32510 FEATURES Spread Spectrum Clock Compatible Operating frequency range: 25MHz to 175MHz Low noise Low jitter internal PLL No external RC filter components required Meets or exceeds DPC133 registered DIMM specification 1.1 Output Enable (OE) pin can be used to disable the CLCK_OUT pins Operating supply of 3.3V VDD Plastic 24 Pin TSSOP package FB_OUT QA0 QA1 QA2 QA3 CLK_IN Ref 0 QA4 PLL FB_IN 1 QA5 QA6 AVDD QA7 QA8 QA9 OE PRODUCT ORDERING INFORMATION PRODUCT NUMBER XRK32510CG PACKAGE TYPE 24 Pin TSSOP OPERATING TEMPERATURE RANGE 0°C to +70°C Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com ...