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IDTCSPT857DBV Datasheet(PDF) 1 Page - Integrated Device Technology |
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IDTCSPT857DBV Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 15 page 1 IDTCSPT857D 2.5V - 2.6V PLL DIFFERENTIAL 1:10 SDRAM CLOCK DRIVER COMMERCIALANDINDUSTRIALTEMPERATURERANGES 2003 Integrated Device Technology, Inc. DSC-6835/3 c IDTCSPT857D COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES 2.5V - 2.6V PHASE LOCKED LOOP DIFFERENTIAL 1:10 SDRAM CLOCK DRIVER OCTOBER 2003 The IDT logo is a registered trademark of Integrated Device Technology, Inc. FEATURES: • 1 to 10 differential clock distribution • Optimized for clock distribution in DDR (Double Data Rate) SDRAM applications requiring improved output crosspoint voltage • Operating frequency: 60MHz to 220MHz • Very low skew: – <100ps for PC1600 - PC2700 – <75ps for PC3200 • Very low jitter: – <75ps for PC1600 - PC2700 – <50ps for PC3200 • 2.5V AVDD and 2.5V VDDQ for PC1600-PC2700 • 2.6V AVDD and 2.6V VDDQ for PC3200 • CMOS control signal input • Test mode enables buffers while disabling PLL • Low current power-down mode • Tolerant of Spread Spectrum input clock • Available in 48-pin TSSOP and TVSOP, 40-pin VFQFPN, and 56- pin VFBGA packages DESCRIPTION: TheCSPT857DisaPLLbasedclockdriverthatactsasazerodelaybuffer todistributeonedifferentialclockinputpair(CLK,CLK)to10differentialoutput pairs(Y[0:9],Y[0:9])andonedifferentialpairoffeedbackclockoutput(FBOUT, FBOUT). External feedback pins (FBIN, FBIN) for synchronization of the outputs to the input reference is provided. A CMOS Enable/Disable pin is available for low power disable. When the input frequency falls below approximately20MHz,thedevicewillenterpowerdownmode. Inthismode, the receivers are disabled, the PLL is turned off, and the output clock drivers aretristated,resultinginacurrentconsumptionoflessthan200 µA. TheCSPT857Drequiresnoexternalcomponentsandhasbeenoptimised forverylowI/Ophaseerror,skew,andjitter,whilemaintainingfrequencyand duty cycleovertheoperatingvoltageandtemperaturerange.TheCSPT857D, designedforuseinbothmoduleassembliesandsystemmotherboardbased solutions,providesanoptimumhigh-performanceclocksource. The CSPT857D is available in Commercial Temperature Range (0°C to +70°C) and Industrial Temperature Range (-40°C to +85°C). See Ordering Informationfordetails. APPLICATIONS: • Meets or exceeds JEDEC standard JESD 82-1A for registered DDR clock driver • Meets proposed DDR1-400 specification • For all DDR1 speeds: PC1600 (DDR200), PC2100 (DDR266), PC2700 (DDR333), PC3200 (DDR400) • Along with SSTV16857, SSTVF16857, SSTV16859, SSTVM16859, SSTVF16859, SSTVN16859, DDR1 register, provides complete solution for DDR1 DIMMs |
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