CDCR83A

www.DataSheet4U.com CDCR83A www.ti.com SCAS811 – AUGUST 2005 DIRECT RAMBUS™ CLOCK GENERATOR FEATURES 400-MHz Differential Clock Source for Direct Rambus™ Memory Systems for an 800-MHz Data Transfer Rate Fail-Safe Power Up Initialization Synchronizes the Clock Domains of the Rambus Channel With an External System or Processor Clock Three Power Operating Modes to Minimize Power for Mobile and Other Power-Sensitive Applications Operates From a Single 3.3-V Supply and 120 mW at 300 MHz (Typ) Packaged in a Shrink Small-Outline Package (DBQ) Supports Frequency Multipliers: 4, 6, 8, 16/3 No External Components Required for PLL Supports Independent Channel Clocking Spread Spectrum Clocking Tracking Capability to Reduce EMI Designed for Use With TI's 133-MHz Clock Synthesizers CDC924 and CDC921 Cycle-Cycle Jitter Is Less Than 50 ps at 400 MHz Certified by Gigatest Labs to Exceed the Rambus DRCG Validation Requirement Supports Industrial Temperature Range of –40°C to 85°C VDDIR REFCLK VDDP GNDP GNDI PCLKM SYNCLKN GNDC VDDC VDDIPD STOPB PWRDNB DBQ PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 S0 S1 VDDO GNDO CLK NC CLKB GNDO VDDO MULT0 MULT1 S2 NC − No internal connection DESCRIPTION The Direct Rambus clock generator (DRCG) provides the necessary clock signals to support a Direct Rambus memory subsystem. It includes signals to synchronize the Direct Rambus channel clock to an external system or processor clock. It i...