ICS9120-49 Integrated Circuit Systems, Inc. Frequency Generator for CD-ROM Systems General Description The ICS9120-49 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. 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 • • • • • • • Unlike competitive devices, the ICS9120-49 operates over the entire 3.0-5.5V range. Applications • Block Diagram 9120-49 Rev A 072296 Specifically designed to support CD-ROM drive requirements of multimedia applications ICS9120-49 Pin Configuration External Components/Crystal Selection The ICS9120-49 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. A parallel resonant 16.9344 MHz, 12pF load crystal is recommended. A series resonant crystal or a parallel resonant crystal specifying a different load can be used, but either will result in frequencies which are slightly (up to 0.06%) different from the ideal. The crystal load capacitance can be increased by adding a capacitor to each of the X1 and X2 pins and ground. This enables the use of a crystal specifying a load greater than 12pF without changing the output frequency. 8-Pin SOIC 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. Pin Descriptions for ICS9120-49 PIN NUMBER 1 2 3 4 5 6 7 8 PIN NAME X1 VDD GND CLK3 CLK2 CLK4 CLK1 X2 TYPE DESCRIPTION Input Power Power Output Output Output Output Output Crystal or external clock source. Has feedback bias for crystal. +Power supply input. Ground return for Pin 2. 33.8688 MHz target output clock. 22.5792 MHz target output clock. 67.7376 MHz target output clock. 16.9344 MHz reference clock buffered output. Crystal output drive (leave this pin unconnected when using an external clock). 2 ICS9120-49 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 SYMBOL VIL VIH IIL IIH VOL* VOH* IOL* I OH* I DD* Rpu* TEST CONDITIONS VIN=0V VIN=VDD IOL=+10mA IOH=-30mA VOL=0.8V VOH=2.4V Unloaded MIN 2.0 -18.0 2.4 25.0 - TYP -8.3 0.15 3.7 45.0 -53.0 38.0 400.0 MAX 0.8 5.0 0.4 -35.0 75.0 800.0 UNITS V V µA µA V V mA mA mA k ohm - 0.9 0.7 1.8 1.4 2.0 1.5 2.5 2.0 ns ns ns ns 45.0 50.0 55.0 % 40.0 50.0 60.0 % - 60.0 180.0 ps -300.0 180.0 300.0 ps -700.0 11.0 11.0 - 150.0 400.0 14.0 5.5 200.0 700.0 17.0 68.0 12.0 ps ns MHz MHz ms - 5 - pF AC Characteristics Rise Time Fall Time Rise Time Fall Time Tr* Tf* Tr* Tf* Duty Cycle Dt* Duty Cycle Dt* Jitter, One Sigma Tjis* Jitter, Absolute Tjab* Jitter, One Sigma Jitter Absolute Input Frequency Range Output Frequency Range Power-up Time Tjis* Tjab* Fi* Fo * Tpu* Crystal Input Capacitance Cinx* 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 ICS9120-49 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 SYMBOL VIL VIH IIL IIH VOL* VOH* IOL* I OH* IDD TEST CONDITIONS VIN=0V VIN=VDD IOL=6.0mA IOH=4.0mA VOL=0.2VDD VOH=0.7VDD Unloaded MIN 0.7V DD -8.0 0.85V DD 15.0 - TYP -3.6 0.05V DD 0.94V DD 24.0 -13.0 25.0 MAX 0.2V DD 5.0 0.1 -8.0 45.0 UNITS V V µA µA V V mA mA mA - 2.3 1.0 2.6 1.5 3.0 2.0 3.5 2.5 ns ns ns ns 45.0 50.0 55.0 % 40.0 45.0 65.0 % - 110.0 150 ps -400.0 200.0 400.0 ps -500.0 11.0 11.0 - 170.0 300.0 14.3 5.5 250.0 500.0 17.0 68.0 12.0 ps ns MHz MHz ms - 5 - pF AC Characteristics Rise Time Fall Time Rise Time Fall Time Tr* Tf* Tr* Tf* Duty Cycle Dt* Duty Cycle Dt* Jitter, One Sigma Tjis* Jitter Absolute Tjab* Jitter, One Sigma Jitter, Absolute Input Frequency Range Output Frequency Range Power-up Time Tjis* Tjab* Fi* Fo * Tpu* Crystal Input Capacitance Cinx* 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 33.8 MHz X1 (Pin 1), X2 (Pin 8) *Parameter is guaranteed by design and characterization. Not 100% tested in production. 4 ICS9120-49 0.154 0.031 0.194 0.063 0.015 0.024 0.008 0.025 0.016 0.050 0.006 ± 0.004 0.238 8-Pin SOIC Package Ordering Information ICS9120M-49 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