ASM5I961C

July 2005 rev 0.2 Low Voltage Zero Delay Buffer Features ƒ ƒ ƒ ƒ Fully Integrated PLL Up to 200MHz I/O Frequency LVCMOS Outputs Outputs Disable in High Impedance ASM5I961C reference clock while the ASM5I961P offers an LVPECL reference clock. When pulled high the OE pin will force all of the outputs (except QFB) into a high impedance state. Because the OE pin does not affect the QFB output, down stream clocks can be disabled without the internal PLL losing lock. The ASM5I961C is fully 2.5V or 3.3V compatible and requires no external loop filter components. All control inputs accept LVCMOS compatible levels and the outputs provide low impedance LVCMOS outputs capable of driving terminated 50Ω transmission lines. For series terminated lines the ASM5I961C can drive two lines per output giving the device an effective fanout of 1:36. The device is packaged in a 32 lead LQFP and TQFP Packages. input www.DataSheet4U.com ƒ LVCMOS Reference Clock Options ƒ ƒ ƒ LQFP and TQFP Packaging ±50pS Cycle–Cycle Jitter 150pS Output Skews Functional Description The ASM5I961C is a 2.5V or 3.3V compatible, 1:18 PLL based zero delay buffer. With output frequencies of up to 200MHz, output skews of 150pS the device meets the needs of the most demanding clock tree applications. The ASM5I961 is offered with two different configurations. The ASM5I961C offers an LVCMOS Block Diagram Q0 CCLK 50K FB_IN 50K F_RANGE 50K Q14 Q15 Q16 OE 50K Figure 1. ASM5I961C Logic Diagram PLL Ref 100-200 MHz FB 50-10...