integrated circuit systems, inc. general description features ics9120-47 modem and audio clock generator ics9120-47revb071696 block diagram 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. ? 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
2 ics9120-47 pin configuration pin descriptions for ics9120-47 8-pin soic 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. pin number pin name type description 1 x1 input 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). 2 vdd power +power supply input. 3 gnd power ground return for pin 2. 4 clk3 output 33.8688 mhz target output clock (with nominal 16.9344 mhz input). 5 clk2 output 22.5792 mhz target output clock (with nominal 16.9344 mhz input). 6 clk4 output 50.8032 mhz target output clock (with nominal 16.9344 mhz input). 7 refclk output 16.9344 mhz reference clock buffered output (with nominal 16.9344 mhz input). 8 x2 output 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).
3 ics9120-47 absolute maximum ratings electrical characteristics at 5 v v dd = +4.5 to +5.5 v, t a = 0 to 70 o c unless otherwise stated * parameter is guaranteed by design and characterization. not 100% tested in production. avdd, vdd referenced to gnd .......................................................................... 7v operating temperature under bias .................................................... 0 o c to +70 o c storage temperature ..................................................................... -65 o c to +150 o c 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. dc characteristics parameter symbol test conditions min typ max units input low voltage v il - - 0.8v input high voltage v ih 2.0 - - v input low current i il v in =0v -18.0 -8.3 - a input high current i ih v in =v dd - - 5.0 a output low voltage v ol * iol=+10ma - 0.15 0.4 v output high voltage v oh * ioh=-30ma 2.4 3.7 - v output low current i ol *v ol =0.8v 25.0 45.0 - ma output high current i oh *v oh =2.4v - -53.0 -35.0 ma supply current i dd * unloaded - 30.0 70.0 ma pull-up resistor value rpu* - 400.0 800.0 k ohm ac characteristics rise time tr* 15pf load 0.8 to 2.0v - 0.8 2.0 ns fall time t f * 15pf load 2.0 to 0.8v - 0.6 1.5 ns rise time t r * 15pf load 20% to 80% - 1.7 2.5 ns fall time t f * 15pf load 80% to 20% - 1.1 2.0 ns duty cycle d t * 15pf load @ 50% of vdd; except refclk 45.0 50.0 55.0 % duty cycle d t * 15pf load @ 50% of vdd; refclk only 40.0 55.0 60.0 % jitter, one sigma t jis * for all frequencies except refclk - 100.0 140.0 ps jitter, absolute t jab * for all frequencies except refclk -400.0 250.0 400.0 ps jitter, one sigma t jis * refclk only - 150.0 150.0 ps jitter absolute t jab * refclk only -700.0 400.0 700.0 ns input frequency range f i * 11.0 14.0 17.0 mhz output frequency range f o * 14.0 - 52.0 mhz power-up time t pu * 0 to 40.3 mhz - 5.5 12.0 ms crystal input capacitance c inx * x1 (pin 1), x2 (pin 8) -5-pf
4 ics9120-47 electrical characteristics at 3.3 v v dd = +3.0 to +3.7 v, t a = 0 o c-70 o c unless otherwise stated * parameter is guaranteed by design and characterization. not 100% tested in production. dc characteristics parameter symbol test conditions min typ max units input low voltage v il - - 0.2v dd v input high voltage v ih 0.7v dd - - v input low current i il v in =0v -8.0 -3.6 - a input high current i ih v in =vdd - - 5.0 a output low voltage v ol *i ol =6.0ma - 0.05v dd 0.1 v output high voltage v oh *i oh =4.0ma 0.85v dd 0.94v dd -v output low current i ol *v o l=0.2v dd 15.0 24.0 - ma output high current i oh *v oh =0.7v dd - -13.0 -8.0 ma supply current i dd * unloaded - 20.0 45.0 ma ac characteristics rise time tr* 15pf load 0.8 to 2.0v - 2.2 3.5 ns fall time t f * 15pf load 2.0 to 0.8v - 1.2 2.0 ns rise time t r * 15pf load 20% to 80% - 2.5 3.5 ns fall time t f * 15pf load 80% to 20% - 1.4 2.5 ns duty cycle d t * 15pf load @ 50% of vdd; except refclk 45.0 50.0 55.0 % duty cycle d t * 15pf load @ 50% of vdd; refclk only 45.0 57.0 65.0 % jitter, one sigma t jis * for all frequencies except refclk - 150.0 200 ps jitter absolute t jab * for all frequencies except refclk -500.0 300.0 500.0 ps jitter, one sigma t jis * refclk only - 170.0 250.0 ps jitter, absolute t jab * refclk only -500.0 350.0 500.0 ns input frequency range f i * 11.0 14.3 15.0 mhz output frequency range f o * 14.0 - 52.0 mhz power-up time t pu* 0 to 40.3 mhz - 5.5 12.0 ms crystal input capacitance c inx* x1 (pin 1), x2 (pin 8) -5-pf
5 ics9120-47 ordering information ics9120m-47 0.194 0.031 0.024 0.016 0.050 0.006
0.004 0.238 0.154 0.015 0.063 0.025 0.008 8-pin soic package example:
ics xxxx m-ppp package type
m =soic device type (consists of 3 or 4-digit numbers) prefix
ics, av=standard device pattern number (2 or 3-digit number for parts with rom code pattern)
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