 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| ADVANCE INFORMATION ICS331 QTClockTM Single Output Clock Features * Packaged as 8 pin SOIC * Zero ppm synthesis error in most applications * Input crystal frequency from 5 to 27 MHz * Input clock frequency from 3 to 50 MHz * Output clock frequencies up to 200 MHz * Four ROM locations for frequency and spread selection * Spread spectrum capability for low EMI * Duty cycle of 45/55 * 3.3 V operating voltage (consult ICS for 5V) * Advanced, low power CMOS pr Description The ICS331 is a low cost frequency generator that is factory programmable. Using Phase-LockedLoop (PLL) techniques, the device uses a standard fundamental mode, inexpensive crystal or clock input to produce a spread or non-spread output clock. The chip has two select inputs that allow the selection of up to four different frequencies stored in memory. If multiple output selections and spread spectrum are not required, refer to the ICS300 and ICS301 for lower cost solutions. The device also has an power down feature that tri states the clock outputs and turns off the PLL when the PDTS pin is taken low. This data sheet is to be used with the one-page programming information for the complete specification on the device. Block Diagram S1, S0 X1/ICLK PDTS Optional crystal capacitors MDS 331 1 Revision 112900 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose *CA*95126*(408) 295-9800tel * www.icst.com www..com 5-27 MHz crystal or clock w w .D w 2 Crystal Oscillator VDD GND t a S a e h t e U 4 .c m o PLL Clock Synthesis Circuitry and OTP ROM Output Buffer CLK X2 ADVANCE INFORMATION ICS331 QTClockTM Single Output Clock Pin Assignment Output Select Table X1/ICLK VDD GND S0 1 2 3 4 8 7 6 5 X2 PDTS S1 CLK S1 0 0 1 1 S0 0 1 0 1 CLK (MHz) TBD TBD TBD TBD Spread Amount TBD TBD TBD TBD The select pins can also be defined as power down or tri state pins. Pin Descriptions Number 1 2 3 4 5 6 7 8 Name X1/ICLK VDD GND S0 CLK S1 PDTS X2 Type XI P P I O I I XO Description Crystal connection. Connect to an 5 to 27 MHz fundamental crystal or clock input. Connect to +3.3 V. Connect to ground. Select pin S0 for frequency selections on CLK. Internal pull-up. CMOS level clock output. Weak internal pull-down when tri state. Select pin S1 for frequency selections on CLK. Internal pull-up. Powers down entire chip, tri states CLK output, when low. Internal pull-up. Crystal connection. Connect to an 5 to 27 MHz fundamental crystal. Float for clock. Key: XI/XO = Crystal Connections, I = Input, O = output, P = power supply connection External Components / Crystal Selection The ICS331 requires a 0.01F decoupling capacitor to be connected between VDD and GND. It must be connected close to the ICS331 to minimize lead inductance. No external power supply filtering is required for this device. A 33 terminating resistor can be used next to each output pin. A parallel resonant, fundamental mode crystal should be used. Crystal capacitors should be connected from each of the pins X1 and X2 to Ground as shown in the Block Diagram on page 1. The value (in pF) of these crystal caps should be = (CL -6)*2, where CL is the crystal load capacitance in pF. These external capacitors are required for all applications. MDS 331 2 Revision 112900 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose *CA*95126*(408) 295-9800tel * www.icst.com ADVANCE INFORMATION ICS331 QTClockTM Single Output Clock Minimum Typical Maximum 7 VDD+0.5 VDD+0.5 70 260 150 3.47 0.4 (VDD/2)+1 (VDD/2)-1 VDD-0.4 2.4 0.4 TBD 70 270 7 5 3 TBD 1 1 49 to 51 27 50 200 0 Units V V V C C C V V V V V V V V mA mA k pF MHz MHz MHz ppm ns ns % s s ps ps Electrical Specifications Parameter Conditions ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage, VDD Referenced to GND Inputs Referenced to GND Clock Outputs Referenced to GND Ambient Operating Temperature Soldering Temperature Max of 10 seconds Storage temperature DC CHARACTERISTICS (VDD = 3.3V unless otherwise noted) Operating Voltage, VDD Input High Voltage, VIH PDTS, S1, S0 Input Low Voltage, VIL PDTS, S1, S0 Input High Voltage, VIH ICLK Input Low Voltage, VIL ICLK Output High Voltage, VOH, CMOS high IOH=-8mA Output High Voltage, VOH IOH=-12mA Output Low Voltage, VOL IOL=12mA IDD Operating Supply Current No Load Short Circuit Current CLK output On-Chip Pull-up Resistor Input pins Input Capacitance AC CHARACTERISTICS (VDD = 3.3V unless otherwise noted) Input Frequency, crystal input Input Frequency, clock input Output Frequency Output Frequency Synthesis Error Output Clock Rise Time 0.8 to 2.0V Output Clock Fall Time 2.0 to 0.8V Output Clock Duty Cycle at VDD/2 Output Enable Time, PDTS high to output on Output Disable Time, PDTS low to tri state Absolute Clock Period Jitter Deviation from mean One Sigma Clock Period Jitter -0.5 -0.5 0 -65 3.13 2 45 55 TBD TBD TBD TBD Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability. 2. Typical values are at 25C. MDS 331 3 Revision 112900 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose *CA*95126*(408) 295-9800tel * www.icst.com ADVANCE INFORMATION ICS331 QTClockTM Single Output Clock Package Outline and Package Dimensions (For current dimensional specifications, see JEDEC Publication No. 95.) 8 pin SOIC Symbol A A1 E INDEX AREA H B C 1 D A1 e C h x 45 D E e H h L Inches Min Max 0.0532 0.0688 0.0040 0.0098 0.0130 0.0200 0.0075 0.0098 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 0.19 0.24 4.80 5.00 3.80 4.00 1.27 BSC 5.80 6.20 0.25 0.50 0.41 1.27 A L B Ordering Information Part/Order Number ICS331M-xx ICS331M-xxT Marking ICS331M ICS331M Package 8 pin SOIC 8 pin SOIC on tape and reel Temperature 0 to 70 C 0 to 70 C The -xx indicates a two-character programming code, which must be specified when ordering parts. While the information presented herein has been checked for both accuracy and reliability, 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. MDS 331 4 Revision 112900 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose *CA*95126*(408) 295-9800tel * www.icst.com |
Price & Availability of ICS331
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |