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ICS9219YGLF-T Datasheet(PDF) 1 Page - Integrated Circuit Systems |
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ICS9219YGLF-T Datasheet(HTML) 1 Page - Integrated Circuit Systems |
1 / 8 page Integrated Circuit Systems, Inc. General Description Features ICS9219 0931B—10/25/04 Block Diagram Direct Rambus™ Clock Generator Lite ICS9219 is a High-speed clock generator providing 400 or 533 MHz differential clock source for direct Rambus memory system. ICS9219 takes a crystal as an input reference source, and produces the differential output clock required for the Rambus channel. ICS9219 provides a solution for a broad range of Direct Rambus memory applications. ICS9219 can be used in single or dual Rambus channels. An additional LVCMOS output, which provides a reference clock at the crystal frequency for the other system blocks is also included. • Compatible with all Direct RambusTM based ICs • Provides differential clock source for direct Rambus memory system with 1GHz data transfer rate capability • Cycle to Cycle jitter is less than 100ps • 3.3V + 4% supply • LVCMOS REF clock @ crystal frequency • Output edge rate control to minimize EMI PLL Control Logic Xtal OSC FS0 X1 X2 FS1 VDDT FS2 BUSCLKT BUSCLKC REF VDDT 1 16 FS0* GND 2 15 VDD X2 3 14 GND X1 4 13 BUSCLKT VDD 5 12 BUSCLKC REF 6 11 GND GND 7 10 VDD FS1* 8 9 FS2* Pin Configuration 16-Pin 173 mil TSSOP * Pins have 60K internal pull-up to VDD Table 1. PLL Multiplier Selection and Output Frequency FS0 Mult BUSCLK 1 0 16 400.00 1 21.33 2 533.30 Notes: 1Output frequencies are based on 25MHz XTAL Input multipliers are also applicable to spread spectrum modulated input clocks. 2 Default muliplier value at power up. |
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