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| ICS300/ICS301/ICS302 QTClockTM Quick Turn Clock Synthesizer Description The ICS300 and ICS301 QTClocksTM generate a high quality, high frequency clock output and a reference from a low frequency crystal or clock input. They are designed to replace crystals and crystal oscillators in most electronic systems. The ICS302 can accept a higher frequency clock input to generate up to 200 MHz. The devices contain a One Time Programmable (OTP) ROM which is factory programmed with the PLL divider values to output a broad range of frequencies, from 6 to 200 MHz, allowing customer requests for different frequencies to be shipped in 1-3 days. Using Phase-Locked-Loop (PLL) techniques, the devices run from a standard fundamental mode, inexpensive crystal, or clock. They are smaller and less expensive than one oscillator. Features * Packaged as 8 pin SOIC * Quick turn frequency programming allows samples in one to three days * Replaces nearly any crystal or oscillator * ICS300 produces up to 100 MHz at 3.3V, ICS301 produces up to 200 MHz at 3.3V ICS302 accepts up to 125 MHz clock input * Easy to cascade with ICS5xx series * Input crystal frequency of 5 - 27 MHz * Input clock frequency of 2 - 125 MHz * Low jitter - 50 ps one sigma * Compatible with all popular CPUs * Duty cycle of 45/55 * Operating voltages of 3.0 to 5.5V * Full CMOS level outputs with 25mA drive capability at TTL levels * Tri-state output + PLL power down pin * Advanced, low power CMOS process Block Diagram VDD GND Crystal or clock input OTP ROM with PLL Divider Values X1/ICLK PLL Clock Synthesis and Control Circuitry Output Buffer CLK Crystal Oscillator X2 Divide Logic and Output Buffer REF PDTS (both outputs and PLL) MDS 300QT E 1 Revision 111000 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose *CA*95126*(408) 295-9800tel* www.icst.com ICS300/ICS301/ICS302 QTClockTM Quick Turn Clock Synthesizer Pin Assignments X1/ICLK VDD GND REF GND VDD GND REF 8 1 ICS300 7 2 3 ICS301 6 4 5 8 1 2 ICS302 7 3 6 4 5 X2 PDTS DC CLK ICLK PDTS DC CLK REF Clock Options REF Reference Reference/2 CLK/2 Off Comments Buffered oscillator output Oscillator frequency divided by two CLK frequency divided by two Output stopped low. Lowest jitter Pin Descriptions Number Number Name Type Description 300/1 302 1 8 X1/ICLK I Crystal connection or clock input. Clock only on ICS302. 2 2 VDD P Connect to +3.3V or +5V. 3 1, 3 GND P Connect to ground. 4 4 REF O Buffered crystal oscillator output clock, or variation per REF clock options table above. 5 5 CLK O Clock output. Fixed frequency between 6 and 200 MHz programmed at factory. 6 6 DC Don't Connect anything to this pin. 7 7 PDTS I Powers down PLL, and puts both outputs into high impedance state, when low. 8 X2 O Crystal connection. Leave unconnected for clock input. Key: I = Input, O = output, P = power supply connection Device Configuration The specification is complete when the ICS300/301/302 QTClock Order Form accompanies this data sheet. The order form lists the input, REF, and CLK actual frequencies, as well as any other available options. This unique configuration is given a two character alphanumeric programming code, which must be specified when referring to samples. External Components / Crystal Selection The ICS300/301/302 requires a 0.01F decoupling capacitor to be connected between VDD and GND. It must be connected close to the ICS300/301/302 to minimize lead inductance. No external power supply filtering is required for this device. A 33 terminating resistor can be used next to the CLK and REF pins. The total on-chip capacitance is approximately 16 pF, so a parallel resonant, fundamental mode crystal should be used. For crystals with a specified load capacitance greater than 16 pF, crystal capacitors can be connected from each of the pins X1 and X2 to Ground. The value (in pF) of these crystal caps should be = (CL -16)*2, where CL is the crystal load capacitance in pF. These external capacitors are only required for applications where the exact frequency is critical. For a clock input, connect to X1/ICLK and leave X2 unconnected (no capacitors on either). MDS 300QT E 2 Revision 111000 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose *CA*95126*(408) 295-9800tel* www.icst.com ICS300/ICS301/ICS302 QTClockTM Quick Turn Clock Synthesizer Electrical Specifications Parameter Conditions Minimum Typical ABSOLUTE MAXIMUM RATINGS (stresses beyond these can permanently damage the device) Supply Voltage, VDD Referenced to GND Inputs Referenced to GND -0.5 Clock Output Referenced to GND -0.5 Ambient Operating Temperature 0 Soldering Temperature Max of 10 seconds Storage temperature -65 DC CHARACTERISTICS (VDD = 5.0V unless otherwise noted) Operating Voltage, VDD 3 Input High Voltage, VIH, ICLK only ICLK (Pin 1) (VDD/2)+1 VDD/2 Input Low Voltage, VIL, ICLK only ICLK (Pin 1) VDD/2 Input High Voltage, VIH PDTS 2 Input Low Voltage, VIL PDTS Output High Voltage, VOH IOH=-4mA VDD-0.4 Output High Voltage, VOH IOH=-25mA 2.4 Output Low Voltage, VOL IOL=25mA IDD Operating Supply Current, 20 MHz crystal No Load, 100MHz 20 Short Circuit Current CLK output 70 On-Chip Pull-up Resistor, PDTS Pin 7 270 Input Capacitance, PDTS Pin 7 4 AC CHARACTERISTICS (VDD = 5.0V unless otherwise noted) Input Frequency, crystal input, ICS300 and 301 5 Input Frequency, clock input, ICS300 and 301 2 Input Frequency, clock input, ICS302 50 Output Frequency, ICS300 VDD = 4.5 to 5.5V 6 Output Frequency, ICS300 VDD = 3.0 to 3.6V 6 Output Frequency, ICS301 and ICS302 VDD = 4.5 to 5.5V 6 Output Frequency, ICS301 and ICS302 VDD = 3.0 to 3.6V 6 Output Clock Rise Time 0.8 to 2.0V 1 Output Clock Fall Time 2.0 to 0.8V 1 Output Clock Duty Cycle (Note 1) at programmed level 45 49 to 51 Absolute Clock Period Jitter Deviation from mean 120 One Sigma Clock Period Jitter 50 Power-up time, PDTS goes high until Refer. out Reference on REF clk 3 Power-up time, PDTS goes high until CLK out 8 Maximum 7 VDD+0.5 VDD+0.5 70 260 150 5.5 (VDD/2)-1 0.4 Units V V V C C C V V V V V V V V mA mA k pF MHz MHz MHz MHz MHz MHz MHz ns ns % ps ps ms ms 0.4 27 50 125 160 100 200 200 55 10 20 Note 1: These are typical values. The actual minimum and maximum duty cycle limits are shown on the ICS300/301/302 QTClock Order Form for each programmed version. MDS 300QT E 3 Revision 111000 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose *CA*95126*(408) 295-9800tel* www.icst.com ICS300/ICS301/ICS302 QTClockTM Quick Turn Clock Synthesizer Package Outline and Package Dimensions (For current dimensional specifications, see JEDEC Publication No. 95.) 8 pin SOIC E Pin 1 H Symbol A A1 B C D A1 e B C h x 45 A L D E e H h L Inches Min Max 0.0532 0.0688 0.0040 0.0098 0.0130 0.0200 0.075 0.098 0.1890 0.1968 0.1497 0.1574 .050 BSC 0.2284 0.2440 0.0099 0.0195 0.0160 0.0500 Millimeters Min Max 1.35 1.75 0.10 0.24 0.33 0.51 1.91 2.40 4.80 5.00 3.80 4.00 1.27 BSC 5.80 6.20 0.25 0.50 0.41 1.27 Ordering Information Part/Order Number ICS300M-xx ICS300MT-xx ICS301M-xx ICS301MT-xx ICS302M-xx ICS302MT-xx Marking ICS300M ICS300M ICS301M ICS301M ICS302M ICS302M Package 8 pin SOIC 8 pin SOIC on tape and reel 8 pin SOIC 8 pin SOIC on tape and reel 8 pin SOIC 8 pin SOIC on tape and reel Temperature 0 to 70 C 0 to 70 C 0 to 70 C 0 to 70 C 0 to 70 C 0 to 70 C xx represents a 2 character alphanumeric programming code assigned by the factory, which indicates the output frequencies on CLK and REF. All samples are shipped with an ICS300/301/302 order form describing the characteristics of the device. While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Inc. (ICS) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments. QTClock is a trademark of ICS MDS 300QT E 4 Revision 111000 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose *CA*95126*(408) 295-9800tel* www.icst.com |
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