MK2731-03 cost, jitter, high performance clock synthesizer designed re

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MK2731-03C MPEG Audio Clock Synthesizer
MK2731-03 cost, jitter, high performance clock synthesizer designed replace oscillators circuits set-top multimedia systems. Using proprietary analog Phase-Locked Loop (PLL) techniques, device uses inexpensive crystal clock input produce three output clocks. audio frequencies synthesized exactly, with zero error, locked clock. MicroClock manufactures largest variety Set-Top multimedia clock synthesizers applications. Consult MicroClock eliminate VCXOs, crystals oscillators from your board.
Packaged narrow SOIC Produces exact audio clocks from video Uses crystal clock input Zero synthesis error clocks frequencies frequency locked 25mA output drive capability levels Advanced, power, sub-micron CMOS process 3.3V operating voltage
Block Diagram
S2:0
PLL/Clock Synthesis Circuitry crystal clock Crystal Oscillator
Output Buffer Output Buffer
CLK1
CLK2
Output Buffer
(Capacitors required crystal tuning)
2731-03C
Revision 011101
Integrated Circuit Systems, Race Street, Jose, 95126 (408) 295-9800 www.icst.com
MK2731-03C MPEG Audio Clock Synthesizer
Assignment
MK2731-03C
CLK2 CLK1
Output Clock Select Table (MHz)
Input CLK1 4.096 5.6448 6.144 12.288 CLK2 8.192 11.2896 12.288 24.576 8.192 11.2896 12.288 24.576
narrow (150 mil) SOIC Descriptions
Number Name CLK1 CLK2 Type
Key:
connect directly ground connect directly clock stopped
Description Crystal connection fundamental crystal. Leave unconnected clock input. Crystal connection fundamental crystal. also connected input clock. VDD. Connect VDD. VDD. Connect VDD. Connect ground. Connect ground. Clock Select Selects outputs table above. Connect ground. connect anything this pin. Clock output determined status table above. Clock Select Selects outputs table above. Connect. Nothing connected internally this pin. Clock Select Selects outputs table above. Clock output determined status table above. Connect. Nothing connected internally this pin. Reference crystal output off. table above.
Key: Input, output, power supply connection
2731-03C
Revision 011101
Integrated Circuit Systems, Race Street, Jose, 95126 (408) 295-9800 www.icst.com
MK2731-03C MPEG Audio Clock Synthesizer
Electrical Specifications
Parameter Supply voltage, Inputs Clock Outputs Ambient Operating Temperature Soldering Temperature Storage temperature Operating Voltage, Input High Voltage, VIH, only Input Voltage, VIL, only Input High Voltage, Input Voltage, Output High Voltage, Output Voltage, Output High Voltage, VOH, CMOS level Operating Supply Current, Short Circuit Current Input Capacitance Frequency synthesis error Input Crystal Clock Frequency Input Crystal Accuracy Output Clock Rise Time Output Clock Fall Time Output Clock Duty Cycle Maximum Absolute Jitter, short term Notes: Conditions Referenced Referenced seconds 3.13 (VDD/2)+1 IOH=-25mA IOL=25mA IOH=-8mA Load Each output clocks VDD-0.4 ±100
27.00
Minimum
Typical
Maximum VDD+0.5 5.50
Units
ABSOLUTE MAXIMUM RATINGS (note
-0.5
CHARACTERISTICS (VDD 5.0V unless noted)
VDD/2 VDD/2
(VDD/2)-1
CHARACTERISTICS (VDD 5.0V unless noted)
table following page
2.0V 0.8V 1.4V
Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage device. Prolonged exposure levels above operating limits below Absolute Maximums affect device reliability.
External Components
MK2731-03 requires minimum number external components proper operation. Decoupling capacitors 0.1µF should connected between pins close MK2731-03 possible. series termination resistor used each clock output. input crystal must connected close chip possible. input crystal should parallel resonant, fundamental, MHz. accurate tuning output when crystal input used, capacitors should connected between ground, ground. value these capacitors given following equation, where crystal load capacitance: Crystal caps (pF) -10) crystal with load capacitance, caps used.
2731-03C
Revision 011101
Integrated Circuit Systems, Race Street, Jose, 95126 (408) 295-9800 www.icst.com
MK2731-03C MPEG Audio Clock Synthesizer
Jitter Measurements
Notes: CLK2 (MHz) 8.192 11.2896 12.288 24.576 sigma (ps) typical 3.3V sigma (ps) typical
Jitter about equal 25°C 70°C
Package Outline Package Dimensions
SOIC narrow
Symbol Inches 0.0532 0.0688 0.0040 0.0098 0.0130 0.0200 0.0075 0.0098 0.3859 0.3937 0.1497 0.1574 .050 0.2284 0.2440 0.0160 0.0500 Millimeters 1.35 1.75 0.10 0.24 0.33 0.51 0.19 0.24 9.80 10.00 3.80 4.00 1.27 5.80 6.20 0.41 1.27
INDEX AREA
Ordering Information
Part/Order Number MK2731-03S MK2731-03STR Marking MK2731-03S MK2731-03S Shipping packaging tubes tape reel Package SOIC SOIC Temperature 0-70 0-70
While information presented herein been checked both accuracy reliability, Integrated Circuit Systems, Incorporated assumes responsibility either infringement patents other rights third parties, which would result from use. other circuits, patents, licenses implied. This product intended normal commercial applications. other applications such those requiring extended temperature range, high reliability, other extraordinary environmental requirements recommended without additional processing ICS. reserves right change circuitry specifications without notice. does authorize warrant product life support devices critical medical instruments.
2731-03C
Revision 011101
Integrated Circuit Systems, Race Street, Jose, 95126 (408) 295-9800 www.icst.com

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