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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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CDCR83 데이터시트(PDF) 4 Page - Texas Instruments |
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CDCR83 데이터시트(HTML) 4 Page - Texas Instruments |
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4 / 13 page  CDCR83 DIRECT RAMBUS CLOCK GENERATOR SCAS632A – APRIL 2001 – REVISED MARCH 2002 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PLL divider selection Table 1 lists the supported REFCLK and BUSCLK frequencies. Other REFCLK frequencies are permitted, provided that (267 MHz < BUSCLK < 400 MHz) and (33 MHz < REFCLK < 100 MHz). Table 1. REFCLK and BUSCLK Frequencies MULT0 MULT1 REFCLK (MHz) MULTIPLY RATIO BUSCLK (MHz) 0 0 67 4 267 0 1 50 6 300 0 1 67 6 400 1 1 33 8 267 1 1 50 8 400 1 0 67 16/3 356 Table 2. Clock Output Driver States STATE PWRDNB STOPB CLK CLKB Powerdown 0 X GND GND CLK stop 1 0 VX, STOP VX, STOP Normal 1 1 PACLK/PLLCLK/ REFCLK† PACLKB/PLLCLKB/ REFCLKB † Depending on the state of S0, S1, and S2 absolute maximum ratings over operating free-air temperature (unless otherwise noted)† Supply voltage range, VDD (see Note 1) –0.5 V to 4 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output voltage range, VO, at any output terminal –0.5 V to VDD + 0.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range,VI, at any input terminal –0.5 V to VDD + 0.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous total power dissipation see Dissipation Rating Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA –40 °C to 85°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg –65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage values are with respect to the GND terminals. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C‡ TA = 70°C POWER RATING TA = 85°C POWER RATING DBQ 1400 mW 11 mW/ °C 905 mW 740 mW ‡ This is the inverse of the junction-to-ambient thermal resistance when board-mounted and with no air flow. |
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