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DS1181L Datasheet(PDF) 5 Page - Maxim Integrated Products |
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DS1181L Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 5 page 20MHz to 134MHz Spread-Spectrum Clock Modulator for LCD Panels Spread-Spectrum Enable On power-up, the output clock (SSO) remains three-stat- ed until the internal PLL reaches a stable frequency. The SSEN input can be used to disable the spread-spec- trum modulation and to three-state the SSO output. If the SSEN pin is pulled high, the spread-spectrum modula- tion is turned off, but the device still uses the internal PLL to generate the clock signal at SSO. If the SSEN pin is floated, the output is three-stated. Application Information Power-Supply Decoupling To achieve best results, it is highly recommended that a decoupling capacitor is used on the IC power-supply pins. Typical values of decoupling capacitors are 0.01µF and 0.1µF. Use a high-quality, ceramic, surface-mount capacitor, and mount it as close as possible to the VCC and GND pins of the IC to minimize lead inductance. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5 © 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. fIN + (0.5%, 1.0%, 1.5%, OR 2.0% OF fIN) fIN fIN - (0.5%, 1.0%, 1.5%, OR 2.0% OF fIN) fSSO TIME 1 DITHER CYCLE RATE DITHER AMOUNT ( ±0.5%, ±1.0%, ±1.5%, OR ±2.0%) CLKIN RANGE (MHz) DITHER RATE 20 TO 134 fIN/832 IF SSEN = 1 Figure 1. DS1181L Spread-Spectrum Frequency Modulation CLKIN SMSEL1 SMSEL2 GND CRSEL VCC DECOUPLING CAPACITOR VCC SSO fIN = 20MHz TO 134MHz NOTE: IN THE ABOVE CONFIGURATION WITH SMSEL1, SMSEL2, AND SSEN CONNECTED TO GND AS WELL AS CRSEL CONNECTED TO VCC, THE DEVICE IS CONFIGURED WITH A SPREAD-SPECTRUM MAGNITUDE OF ±2.0%, AND ALLOWS A CLKIN BETWEEN 20MHz and 38MHz. fSSO DITHERED SSEN DS1181L Typical Operating Circuit Package Information (For the latest package outline information, go to www.maxim-ic.com/DallasPackInfo.) PACKAGE TYPE DOCUMENT NO. 8 TSSOP 56-G2021-000 |
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