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CDCR61APW Fiches technique(PDF) 1 Page - Texas Instruments |
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CDCR61APW Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 10 page CDCR61A DIRECT RAMBUS ™ CLOCK GENERATOR – LITE SCAS626 – FEBRUARY 2000 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D 400-MHz Differential Clock Source for Direct Rambus Memory Systems for an 800-MHz Data Transfer Rate D Operates From Two (3.3-V and 1.80-V) Power Supplies With 180 mW (Typ) at 400 MHz Total D Packaged in a Thin Shrink Small-Outline Package (PW) D External Crystal Required for Input description The Direct Rambus clock generator – lite (DRCG-Lite) is an independent crystal clock generator. It performs clock multiplication using PLL, sourced by an internal crystal oscillator. It provides one differential, high-speed Rambus channel compatible output pair. Also, one single-ended output is available to deliver 1/2 of the crystal frequency. The Rambus channel operates at up to 400 MHz with an option to select 300 MHz as well. The desired crystal is a 18.75-MHz crystal in a series resonance fundamental application. The CDCR61A is characterized for operation over free-air temperatures of 0 °C to 85°C. functional block diagram /2 OSC PLL BUSCLK LCLK 2 S0 XTAL XOUT XIN S1 S2 DIV VDDP BUSCLK FREQUENCY SETTINGS S0 M (PLL MULTIPLIER) 0 16 1 or Open 64/3 FUNCTION TABLE VDDP S1 S2 MODE CLK CLKB LCLK ON 0 0 Normal CLK CLKB XIN divided by 2 ON 1 1 Normal CLK CLKB XIN divided by 2 ON 0 1 Test Divided by 2 Divided by 2 XIN divided by 2 ON 1 0 Test Divided by 4 Divided by 4 XIN divided by 2 0 V 0 0 Test XIN XIN (invert) XIN divided by 2 0 V 1 1 Test XIN XIN (invert) XIN divided by 2 0 V 0 1 Test XIN divided by 2 XIN (invert) divided by 2 XIN divided by 2 0 V 1 0 Test XIN divided by 4 XIN (invert) divided by 4 XIN divided by 2 Copyright © 2000, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Direct Rambus and Rambus are trademarks of Rambus Inc. 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VDDP GNDP XOUT XIN VDDL LCLK GNDL S1 S0 VDD GND CLK CLKB GND VDD S2 PW PACKAGE (TOP VIEW) |
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