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| INDEX PRELIMINARY MX8330 RAMBUS CLOCK GENERATOR FEATURES * Clock generator for RambusTM Channel * Provide output frequency select pin * Provide a Rambus interface level output frequency which is 14 or 17 times of input frequency * Provide a TTL interface level output frequency which is input frequency divided by 4 * Provide a TTL interface level output frequency which is 14/5 or 17/5 times of input frequency * 3.3 V power supply * Package 8-pin SOP (150mil) GENERAL DESCRIPTION The product is a clock synthesizer chip for Rambus Channel. It uses advanced Phase lock loop technology to generate three desired clock. The reference clock is supplied by external crystal.The crystal frequency is 4 x 3.579545 MHz in NTSC case, and is 4 x 4.43361875 MHz in PAL case. The output clock (FSO) is 243.40906 MHz and 248.28265 MHz respectively. The FSO clock interface level has to be Rambus interface compatible. Beside FSO clock, a FSO divided by five clock output is also provided.The FSO/5 clock output is TTL compatible. The product is 3.3 V operation, and the package type is 8-pin SOP. PIN CONFIGURATIONS 8-PIN SOP FSO/5 GND FSO VDD 1 MX8330 8 7 6 5 FSC FSEL OSCIN OSCOUT 2 3 4 Rambus and are trademarks of Rambus Inc. P/N: PM0274 REV. 2.6, FEB. 27, 1996 1 INDEX MX8330 PIN DESCRIPTION SYMBOL FSO/5 GND FSO VDD OSCOUT OSCIN FSEL O I I O PIN TYPE O PIN NUMBER 1 2 3 4 5 6 7 DESCRIPTION Clock output. FSO divided by 5. Ground Rambus clock output. Rambus interface level. Power supply Crystal pin Crystal pin Frequency select pin(High:FSO=17*4*FSC, Low:FSO=14*4*FSC). Toggling of FSEL will reset the counter in the FEEDBACK DIVIDER. FSC O 8 Clock output. Crystal frequency divided by 4. BLOCK DIAGRAM FSEL FEEDBACK DIVIDER OSCIN OSCOUT OSC PFC CHARGE PUMP & LF VCO FSO /5 LOOP FILTER FSO/5 /4 FSC FUNCTIONAL DESCRIPTION The Rambus clock generator is an integrated circuit of phase locked loop frequency synthesizer.It provides three clock outpot frequencies. The first output frequency (FSC) is the crystal frequency divided by 4 clock. The second output frequency (FSO) is 14 or 17 times of crystal frequency. The FSO output frequency can be selected by FSEL Pin. When FSEL pin is high, FSO is 17 times of crystal frequency. When FSEL is low, FSO is 14 times of crystal frequency. FSO is Rambus interface level output. The third output frequency is FSO divided by 5 clock output. As shown in the block diagram, a Phase locked loop consists of feedback divider, phase frequency comparator(PFC), Charge pump, voltage controlled osillator(VCO), and loop filter. All components for PLL are integrated inside the chip. Note:Application notice for Rev.E of the MX8330. Because the VCO and the counter in the FEEDBACK 2 DIVIDER can not operate in accordance with each other in the initial stage. If the power on voltage is less than 3.3V the counter in the FEEDBACK DIVIDER must be reseted. The counter in the FEEDBACK DIVIDER can be reset by toggling the FSEL after VDD exceed 3.0V. It takes 5ms for FSO to be stable after FSEL's toggling. FREQUENCY TABLE( in MHz) (in NTSC case) CRYSTAL 4*3.579545 4*3.579545 FSEL 1 0 FSC 3.579545 3.579545 FSO 17*4*3.579545 14*4*3.579545 (in PAL case) CRYSTAL 4*4.43361875 4*4.43361875 FSEL 1 0 FSC FSO 4.43361875 17*4*4.43361875 4.43361875 14*4*4.43361875 INDEX MX8330 ABSOLUTE MAXIMUM RATINGS RATING Storage Temperature Applied Input Voltage Applied Output Voltage Supply Voltage Operating Temperature Power Dissipation VALUE -85oC to 150oC -0.5V to VDD + 0.5V -0.5V to VDD + 0.5V -0.5V to 5V 0 to 70oC 0.5Watts NOTICE: Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended period may affect reliability. NOTICE: Specifications contained within the following tables are subject to change. DC CHARACTERISTICS TA = 0oC to 80oC, VDD = 3.15V to 3.6V SYMBOL VIL VIH IIL IIH IVDD VOL VOH CI RL VLT IOH IOL Ro PARAMETER Input Low Voltage Input High Voltage Input Low Current Input High Current VDD Current Output Low Voltage Output High Voltage Input Capacitance Line Impedence Line Termination Voltage Output High Current Output Low Current Output Resistance 20 2.2 -10 40 5.3 175 85 50 8 350 175 50 2.4 10 75 2.7 10 75 10 525 260 20 30 2.4 -5 5 40 0.4 MIN. TYP. MAX. 0.8 UNIT V V uA uA mA V V pF Ohm V uA mA Ohm Ohm Ohm Rambus Level, see note 1 Rambus Level, see note 1 FSO output VOL=0.4V, FSO output FSO output IOH=-600uA, FSC output IOL=600uA, FSC output IOL=8mA, FSO/5 output IOH=-4mA, FSO/5 output CONDITIONS Ro (PMOS) Output Resistance Ro (NMOS) Output Resistance AC CHARACTERISTICS TA = 0oC to 80oC, VDD = 3.15V to 3.6V SYMBOL Dt1 Dt2 J Tr/Tf Tr/Tf Tup PARAMETER Duty Cycle Duty Cycle Jitter,short term Rise/Fall Time Rise/Fall Time Power up Time 0.3 2 3.5 1 MIN. 45 55 59 TYP. MAX. 55 62 150 0.7 5 5 UNIT % % ps ns ns ms Rambus level, FSO output FSO/5 output, 30 pF load 1. After power is stable 2. Frequency from 0 to 250 MHz Note1: Defined by customer's system implementation CONDITIONS FSO, FSC FSO/5 for Rev.E 3 INDEX MX8330 ORDERING INFORMATION PART NO. MX8330MC PACKAGE 8-PIN SOP PACKAGE INFORMATION 8-PIN PLASTIC SOP (150 mil) 8 5 ITEM A B C D E F G H I J K L MILLIMETER 4.95 MAX. .53 [REF] 1.27 [TP] .41 [TYP.] .10 MIN. 1.73 MAX. 1.45 .13 5.99 .3 3.91 .13 1.02 .20 [TYP.] .76 INCHES .195 MAX. .021 [REF] .050 [TP] .016 [TYP.] .004 MIN. .068 MAX. .057 .005 .236 .012 .154 .005 .040 .008 [TYP.] .030 1 4 A H I J NOTE:Each lead centerline is located within .25 mm[.01 inch] of its true position [TP] at maximum material condition. G F K D C B E L 4 INDEX MX8330 MACRONIX INTERNATIONAL CO., LTD HEADQUARTERS : TEL : +886-3-578-8888 FAX : +886-3-578-8887 EUROPE OFFICE : TEL : +32-2-456-8020 FAX : +32-2-456-8021 JAPAN OFFICE : TEL : +81-44-246-9100 FAX : +81-44-246-9105 SINGAPORE OFFICE : TEL : +65-747-2309 FAX : +65-748-4090 TAIPEI OFFICE : TEL : +886-2-2509-3300 FAX : +886-2-2509-2200 MACRONIX AMERICA INC. TEL : +1-408-453-8088 FAX : +1-408-453-8488 CHICAGO OFFICE : TEL : +1-847-963-1900 FAX : +1-847-963-1909 http : //www.macronix.com MACRONIX INTERNATIONAL CO., LTD. reserves the right to change product and specifications without notice. 5 |
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