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| Integrated Circuit Systems, Inc. ICS9120-47 Modem and Audio Clock Generator General Description The ICS9120-47 is a high performance frequency generator designed to support digital compact disk drive systems. It offers all clock frequencies required for the servo and decoder sections of these devices. These frequencies are synthesized from a single 16.9344 MHz on-chip oscillator. High accuracy, low jitter PLLs meet the 150 ppm frequency tolerance required by these systems. Fast output clock edge rates minimize board induced jitter. Unlike competitive devices, the ICS9120-47 operates over the entire 3.0-5.5V range. * * * * * * * * Features Generates the output clock frequencies required by CD-ROM drive systems Single 16.9344 MHz crystal or system clock reference 100ps one sigma jitter Output rise/fall times less than 2.0ns (at 5V VDD) On-chip loop filter components 3.0V-5.5V supply range 150 ppm output frequency accuracy 8-pin, 150-mil SOIC Applications * Specifically designed to support CD-ROM drive requirements of multimedia applications Block Diagram 9120-47 Rev B 071696 ICS9120-47 Pin Configuration External Components/Crystal Selection The ICS9120-47 incorporates a crystal oscillator circuit de-signed to provide 50% duty cycle over a range of operating conditions, including the addition of external crystal load ca-pacitors to pins X1 and X2. For the crystal oscillator, the crystal load capacitance must be connected externally by adding a capacitor from each of the X1 and X2 pins to ground. A parallel resonant 16.9344 MHz crystal is recommended. Duty cycle is also maintained when using an external clock source (connected to X1, X2 left unconnected) as long as the external clock has good duty cycle. 8-Pin SOIC Pin Descriptions for ICS9120-47 PIN PIN NAME NUMBER 1 X1 TYPE Input DESCRIPTION Crystal or external clock source. Has feedback bias for crystal. Nominally 16.9344 MHz input applied. (No internal load cap; must connect external load cap to ground for crystal oscillator). +Power supply input. Ground return for Pin 2. 33.8688 MHz target output clock (with nominal 16.9344 MHz input). 22.5792 MHz target output clock (with nominal 16.9344 MHz input). 50.8032 MHz target output clock (with nominal 16.9344 MHz input). 16.9344 MHz reference clock buffered output (with nominal 16.9344 MHz input). Crystal output drive (leave this pin unconnected when using an external clock). (No internal load cap; must connect external load cap to ground for crystal oscillator). 2 3 4 5 6 7 8 VDD GND CLK3 CLK2 CLK4 REFCLK X2 Power Power Output Output Output Output Output 2 ICS9120-47 Absolute Maximum Ratings AVDD, VDD referenced to GND .......................................................................... 7V Operating temperature under bias .................................................... 0 oC to +70oC Storage temperature ..................................................................... -65oC to +150 oC Voltage on I/O pins referenced to GND ...................... GND -0.5V to VDD +0.5V Power dissipation ...................................................................................... 0.5 Watts Stresses above 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 the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability. Electrical Characteristics at 5 V VDD = +4.5 to +5.5 V, TA = 0 to 70oC unless otherwise stated DC Characteristics PARAMETER Input Low Voltage Input High Voltage Input Low Current Input High Current Output Low Voltage Output High Voltage Output Low Current Output High Current Supply Current Pull-up Resistor Value Rise Time Fall Time Rise Time Fall Time Duty Cycle Duty Cycle Jitter, One Sigma Jitter, Absolute Jitter, One Sigma Jitter Absolute Input Frequency Range Output Frequency Range Power-up Time Crystal Input Capacitance SYMBOL VIL VIH IIL IIH VOL* VOH* IOL* IOH* IDD* Rpu* Tr* Tf* Tr* Tf* Dt* Dt* Tjis* Tjab* Tjis* Tjab* Fi* Fo* Tpu* Cinx* TEST CONDITIONS MIN 2.0 -18.0 2.4 25.0 45.0 40.0 -400.0 -700.0 11.0 14.0 - TYP -8.3 0.15 3.7 45.0 -53.0 30.0 400.0 0.8 0.6 1.7 1.1 50.0 55.0 100.0 250.0 150.0 400.0 14.0 5.5 5 MAX 0.8 5.0 0.4 -35.0 70.0 800.0 2.0 1.5 2.5 2.0 55.0 60.0 140.0 400.0 150.0 700.0 17.0 52.0 12.0 - UNITS V V A A V V mA mA mA k ohm ns ns ns ns % % ps ps ps ns MHz MHz ms pF VIN=0V VIN=VDD IOL=+10mA IOH=-30mA VOL=0.8V VOH=2.4V Unloaded AC Characteristics 15pF load 0.8 to 2.0V 15pF load 2.0 to 0.8V 15pF load 20% to 80% 15pF load 80% to 20% 15pF load @ 50% of VDD; Except REFCLK 15pF load @ 50% of VDD; REFCLK only For all frequencies except REFCLK For all frequencies except REFCLK REFCLK only REFCLK only 0 to 40.3 MHz X1 (Pin 1), X2 (Pin 8) *Parameter is guaranteed by design and characterization. Not 100% tested in production. 3 ICS9120-47 Electrical Characteristics at 3.3 V VDD = +3.0 to +3.7 V, TA = 0OC-70oC unless otherwise stated DC Characteristics PARAMETER Input Low Voltage Input High Voltage Input Low Current Input High Current Output Low Voltage Output High Voltage Output Low Current Output High Current Supply Current AC Characteristics SYMBOL VIL VIH IIL IIH VOL* VOH* IOL* IOH* IDD* Tr* Tf* Tr* Tf* Dt* Dt* Tjis* Tjab* Tjis* Tjab* Fi* Fo* Tpu* Cinx* TEST CONDITIONS VIN=0V VIN=VDD IOL=6.0mA IOH=4.0mA VOL=0.2VDD VOH=0.7VDD Unloaded 15pF load 0.8 to 2.0V 15pF load 2.0 to 0.8V 15pF load 20% to 80% 15pF load 80% to 20% 15pF load @ 50% of VDD; Except REFCLK 15pF load @ 50% of VDD; REFCLK only For all frequencies except REFCLK For all frequencies except REFCLK REFCLK only REFCLK only MIN 0.7VDD -8.0 0.85VDD 15.0 45.0 45.0 -500.0 -500.0 11.0 14.0 - TYP -3.6 0.05VDD 0.94VDD 24.0 -13.0 20.0 2.2 1.2 2.5 1.4 50.0 57.0 150.0 300.0 170.0 350.0 14.3 5.5 5 MAX 0.2VDD 5.0 0.1 -8.0 45.0 3.5 2.0 3.5 2.5 55.0 65.0 200 500.0 250.0 500.0 15.0 52.0 12.0 - UNITS V V A A V V mA mA mA ns ns ns ns % % ps ps ps ns MHz MHz ms pF Rise Time Fall Time Rise Time Fall Time Duty Cycle Duty Cycle Jitter, One Sigma Jitter Absolute Jitter, One Sigma Jitter, Absolute Input Frequency Range Output Frequency Range Power-up Time Crystal Input Capacitance 0 to 40.3 MHz X1 (Pin 1), X2 (Pin 8) *Parameter is guaranteed by design and characterization. Not 100% tested in production. 4 ICS9120-47 0.154 0.031 0.024 0.008 0.194 0.063 0.015 0.016 0.050 0.006 0.004 0.238 0.025 8-Pin SOIC Package Ordering Information ICS9120M-47 Example: ICS XXXX M-PPP Pattern Number (2 or 3-digit number for parts with ROM code pattern) Package Type M =SOIC Device Type (consists of 3 or 4-digit numbers) Prefix ICS, AV=Standard Device 5 |
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