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| PRELIMINARY INFORMATION MK2731-04C MPEG Audio Clock Description The MK2731-04 is a low cost, low jitter, high performance clock synthesizer designed to replace expensive discrete clock oscillators in MPEG audio applications. Using ICS/MicroClock's patented analog/digital Phase-Locked Loop (PLL) techniques, the device uses an inexpensive 14.4 MHz crystal input to produce all of the popular audio sampling frequencies. ICS manufactures the largest variety of Set-Top Box and multimedia clock synthesizers for all applications. Consult ICS to eliminate VCXOs, crystals and oscillators from your board. Features * Packaged in 16 pin narrow SOIC * Replaces multiple oscillators * 3.3V or 5V operation * Uses an inexpensive 14.4 MHz crystal * Supports 32 kHz, 44.1 kHz, 48 kHz, and 96 kHz audio sampling rates * Has 256x, 384x, and 512x sampling rates compatible with every popular audio DAC * Zero ppm synthesis error * 25 mA output drive capability at TTL levels * Advanced, low power, sub-micron CMOS process Block Diagram VDD 3 3 GND 3 S2:S0 X1 14.40 MHz crystal X2 Crystal Oscillator PLL/Clock Synthesis Circuitry /2 Output Buffer Output Buffer CLK2 CLK1 MDS 2731-04 CA 1 Revision 122799 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose * CA * 95126 * (408)295-9800tel * www.icst.com PRELIMINARY INFORMATION MK2731-04C MPEG Audio Clock Pin Assignment Output Clocks Select Table (MHz) 16 15 14 13 12 11 10 9 DC DC S0 S1 DC CLK2 VDD CLK1 S2 Pin 8 0 0 0 0 1 1 1 1 S1 Pin 13 0 0 1 1 0 0 1 1 S0 Pin 14 0 1 0 1 0 1 0 1 CLK1 Pin 9 16.9344 11.2896 8.192 18.432 11.2896 12.288 Test Test CLK2 Pin 11 33.8688 22.5792 16.384 36.864 22.5792 24.576 Test Test MK2731-04 X2 X1 VDD VDD GND GND GND S2 1 2 3 4 5 6 7 8 Key: 16 pin narrow (150 mil) SOIC Pin Descriptions Number 1 2 3, 4, 10 5, 6, 7 8 9 11 12, 15, 16 13 14 Name X2 X1 VDD GND S2 CLK1 CLK2 DC S1 S0 Type XO XI P P I O O I I 0 = connect directly to GND 1 = connect directly to VDD Description Crystal connection. Connect to a parallel mode 14.4 MHz crystal. Crystal connection. Connect to a parallel mode 14.4 MHz crystal. Connect to +3.3V or +5V. Must be same at all VDDs. Connect to ground. Frequency select pin 2. Determines clock outputs per table above. Clock output 1 set by status of S0-S2. See table above. This output is CLK2/2 Clock output 2 set by status of S0-S2. See table above. Don't Connect. Do not connect anything to these pins. Frequency select pin 1. Determines clock outputs per table above. Frequency select pin 0. Determines clock outputs per table above. Key: I = Input with internal pull-up resistor; O = output; P = power supply connection; XI, XO = crystal connections External Components The MK2731-04 requires a minimum number of external components for proper operation. Decoupling capacitors of 0.01F should be connected between VDD and GND on pins 3 and 5, and VDD and GND on pins 10 and 6, as close to the MK2731-04 as possible. Other VDDs can be connected to pin 10. A series termination resistor of 33 may be used for each clock output. Any unused clock outputs should be left unconnected (DC, floating). The input crystal must be connected as close to the chip as possible. The input crystal should be fundamental mode, parallel resonant. For accurate outputs, the crystal should be tuned with two identical capacitors to ground, as shown on the block diagram. The value of these two crystal caps should be equal to (CL -6)*2, where CL is the crystal load (or correlation) capacitance. MDS 2731-04 CA 2 Revision 122799 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose * CA * 95126 * (408)295-9800tel * www.icst.com PRELIMINARY INFORMATION MK2731-04C MPEG Audio Clock Typical Maximum 7 VDD+0.5 70 260 150 5.0 VDD/2 VDD/2 5.50 (VDD/2)-1 0.8 Units V V C C C V V V V V V V V mA mA pF ppm MHz ns ns % ps ps Electrical Specifications Parameter Supply voltage, VDD Inputs and Clock Outputs Ambient Operating Temperature Soldering Temperature Storage temperature Operating Voltage, VDD Input High Voltage, VIH, X1 pin only Input Low Voltage, VIL, X1 pin only Input High Voltage, VIH Input Low Voltage, VIL Output High Voltage, VOH Output Low Voltage, VOL Output High Voltage, VOH, CMOS level Operating Supply Current, IDD Short Circuit Current Input Capacitance Frequency synthesis error Input Crystal Frequency Output Clock Rise Time Output Clock Fall Time Output Clock Duty Cycle Maximum Absolute Jitter, short term Conditions Referenced to GND Referenced to GND Max of 10 seconds -65 3.00 (VDD/2)+1 2 IOH=-12mA IOL=12mA IOH=-4mA No Load Each output S0, S1, S2 Both clocks 2.4 0.4 VDD-0.4 10 50 7 0 14.40 0.8 to 2.0V 2.0 to 0.8V At VDD/2 11.288MHz, VDD=5V 11.288MHz, VDD=3.3V 1.5 1.5 60 65 85 Minimum ABSOLUTE MAXIMUM RATINGS (note 1) -0.5 0 DC CHARACTERISTICS (VDD = 3.3V unless noted) AC CHARACTERISTICS (VDD = 3.3V unless noted) 40 Note: 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. MDS 2731-04 CA 3 Revision 122799 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose * CA * 95126 * (408)295-9800tel * www.icst.com PRELIMINARY INFORMATION MK2731-04C MPEG Audio Clock Package Outline and Package Dimensions (For current dimensional specifications, see JEDEC Publication No. 95.) 16 pin narrow SOIC E H D A1 e C B L A Symbol A A1 B C D E H e h L SOIC Min Max 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 9.80 10.00 3.80 4.00 5.80 6.20 1.27 BSC 0.25 0.50 0.40 1.27 All dimensions in mm. Ordering Information Part/Order Number MK2731-04S MK2731-04STR Marking MK2731-04S MK2731-04S Shipping packaging tubes tape and reel Package 16 pin SOIC 16 pin SOIC Temperature 0-70 C 0-70 C While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (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 2731-04 CA 4 Revision 122799 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose * CA * 95126 * (408)295-9800tel * www.icst.com |
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