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| INDEX PRELIMINARY MX9911 VIDEO CLOCK GENERATOR FEATURES * Clock generator for Video Graphic System * Provide output frequency select pin * Provide a select pin to select 14/5 or 17/5 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 Video Graphic System. It uses advanced Phase lock loop technology to generate 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. A select pin is provided to select 14/5 or 17/5 times of reference clock. Beside that, reference clock divided by four clock output (FSC) is also provided. The product is 3.3 V operation, and the package type is 8-pin SOP. PIN CONFIGURATIONS 8-PIN SOP FSO/5 GND N.C. VDD 1 8 FSC FSEL OSCIN OSCOUT 2 3 4 MX9911 7 6 5 P/N: PM0463 REV. 1.2, AUG 12, 1997 1 INDEX MX9911 PIN DESCRIPTION SYMBOL FSO/5 GND N.C. VDD OSCOUT OSCIN FSEL O I I PIN TYPE O PIN NUMBER 1 2 3 4 5 6 7 DESCRIPTION Clock output. Crystal frequency times 17/5 or 14/5 Ground No connection Power supply Crystal pin Crystal pin Frequency select pin(High:FSO/5=4*FSC*17/5, Low:FSO/5=4*FSC*14/5). 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 /5 FSO/5 LOOP FILTER /4 FSC FUNCTIONAL DESCRIPTION The Video clock generator is an integrated circuit of phase locked loop frequency synthesizer.It provides two clock output frequencies. The first output frequency (FSC) is the crystal frequency divided by 4 clock. The second output frequency (FSO/5) is 14/5 or 17/5 times of crystal frequency. The FSO/5 output frequency can be selected by FSEL Pin. When FSEL pin is high, FSO/5 is 17/5 times of crystal frequency. When FSEL is low, FSO/ 5 is 14/5 times of crystal frequency. 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: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/5 4*3.579545*17/5 4*3.579545*14/5 (in PAL case) CRYSTAL 4*4.43361875 4*4.43361875 FSEL FSC 1 0 4.43361875 4.43361875 FSO/5 4*4.43361875*17/5 4*4.43361875*14/5 2 INDEX MX9911 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 80oC 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 PARAMETER Input Low Voltage Input High Voltage Input Low Current Input High Current VDD Current Output Low Voltage Output High Voltage Input Capacitance 175 85 350 175 2.4 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 Ohm 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 Tr/Tf Tup PARAMETER Duty Cycle Duty Cycle Rise/Fall Time Power up Time MIN. 45 55 2 59 3.5 1 TYP. MAX. 55 62 5 5 UNIT % % ns ms CONDITIONS FSC FSO/5 for Rev.E, 30pF load FSO/5 output, 30 pF load 1. After power is stable 2. FSO/5 frequency from 0 to 50MHz 3 INDEX MX9911 ORDERING INFORMATION PART NO. MX9911MC 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 4.90 .05 .60 .10 1.27 [TP] .41 .10 .13 .03 1.60 .13 1.45 .13 5.99 .3 3.91 .13 1.02 .13 .20 .60 .10 INCHES .193 .002 .024 .004 .050 [TP] .016 .004 .005 .001 .063 .005 .057 .005 .236 .012 .154 .005 .040 .005 .008 .024 .004 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 MX9911 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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