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I C R O C LOC K
Description
The MK2703 is a low cost, low jitter, high performance PLL clock synthesizer designed to replace oscillators and PLL circuits in set-top box and multimedia systems. Using our patented analog Phase-Locked Loop (PLL) techniques, the device uses a 27 MHz crystal or clock input to produce a buffered reference clock and a selectable audio clock. MicroClock manufactures the largest variety of Set-Top Box and multimedia clock synthesizers for all applications. Consult MicroClock to eliminate VCXOs, crystals and oscillators from your board.
MK2703 PLL Audio Clock Synthesizer
Features
* Packaged in 8 pin SOIC * Uses an inexpensive fundamental crystal, or clock * Supports MPEG sampling rates of 32 kHz, 44.1 kHz, 48 kHz and 96 kHz * Patented zero ppm synthesis error in all clocks * All frequencies are frequency locked * 25 mA output drive capability at TTL levels * Advanced, low power, sub-micron CMOS process * 3.3 V or 5 V operating voltage * For audio clocks that require lower jitter, use the MK2731-03C * Industrial temperature version available
Block Diagram
VDD GND
2 S1:0 PLL Clock Synthesis and Control Circuitry Output Buffer Audio Clock
27 MHz crystal or clock X1 Crystal Oscillator
X2
Output Buffer
27.000 MHz
(Capacitors are required for crystal tuning)
1 Revision 062700 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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Pin Assignment
MK2703 PLL Audio Clock Synthesizer
MK2703
X1 VDD GND 27M 1 2 3 4 8 7 6 5 X2 S0 S1 CLK Audio Clock Output Select Table (MHz) S1 S0 CLK 0 0 8.192 0 1 11.2896 1 0 12.288 1 1 24.576 Key: 0 = connect pin directly to ground 1 = connect pin directly to VDD
8 pin SOIC
Pin Descriptions
Number 1 2 3 4 5 6 7 8 Name X1 VDD GND 27M CLK S1 S0 X2 Type XI P P O O I(PU) I(PU) XO Description Crystal Connection. Connect to a 27.0 MHz fundamental crystal or clock. Connect to +3.3V or +5V. Connect to ground. 27.00 MHz buffered reference clock output. Audio Clock Output per table above. Audio Clock Frequency Select Input #1. Determines CLK output per table above. Audio Clock Frequency Select Input #0. Determines CLK output per table above. Crystal Connection to a 27.0 MHz crystal, or leave unconnected for clock input.
Key: XI, XO = Crystal connections; I(PU)= Input with internal pull-up resistor; O = output; P = power supply connection
2 Revision 062700 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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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 Input Crystal Accuracy Output Clock Rise Time Output Clock Fall Time Output Clock Duty Cycle Maximum Absolute Jitter, short term Notes: Conditions Referenced to GND Referenced to GND MK2703S MK2703SI Max of 10 seconds
MK2703 PLL Audio Clock Synthesizer
Minimum Typical Maximum 7 VDD+0.5 70 85 260 150 5.50 VDD/2 VDD/2 (VDD/2)-1 0.8 Units V V C C C C V V V V V V V V mA mA pF ppm MHz ppm ns ns % ps
ABSOLUTE MAXIMUM RATINGS (note 1)
-0.5 0 -40 -65 3.13 (VDD/2)+1 2 IOH=-12mA IOL=12mA IOH=-4mA No Load Each output S1, S0 All clocks 2.4 0.4 VDD-0.4 25 50 5 0 27.00 0.8 to 2.0V 2.0 to 0.8V At VDD/2 30 1.5 1.5 60 190
DC CHARACTERISTICS (VDD = 3.3 V unless noted)
AC CHARACTERISTICS (VDD = 3.3 V unless noted)
40
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.
External Components
The MK2703 requires a minimum number of external components for proper operation. For a crystal input, one load capacitor should be connected from each of the X1 and X2 pins to ground. The value (in pF) of each crystal load capacitor should equal (CL -16)*2, where CL is the crystal's load (correlation) capacitance in pF. The input crystal must be connected as close to the chip as possible. The input crystal should be a parallel resonant, fundamental, AT cut 27 MHz. For a clock input, connect to X1 and leave X2 unconnected. Decoupling capacitors of 0.01F should be connected between VDD and GND on pins 2 and 3, as close to the MK2703 as possible. A series termination resistor of 33 may be used for the clock output. 3 Revision 062700 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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I C R O C LOC K
MK2703 PLL Audio Clock Synthesizer
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
2
D A1 e Ordering Information
Part/Order Number MK2703S MK2703STR MK2703SI MK2703SITR Marking MK2703S MK2703S MK2703I MK2703I
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
B
C
A L
Shipping packaging tubes tape and reel tubes tape and reel
Package 8 pin SOIC 8 pin SOIC 8 pin SOIC 8 pin SOIC
Temperature 0 to 70C 0 to 70C -40 to 85C -40 to 85C
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.
4 Revision 062700 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race Street * San Jose *CA*95126* (408) 295-9800tel * www.icst.com
MDS 2703 C

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