COST VCXO MK2731-01 cost, jitter, high-performance VCXO clock syn

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COST VCXO MK2731-01 cost, jitter, high-performance VCXO clock syn

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MK2731-01
COST VCXO
MK2731-01 cost, jitter, high-performance VCXO clock synthesizer designed replace expensive discrete VCXOs, PLLs oscillators. on-chip Voltage Controlled Crystal Oscillator accepts input voltage cause output clocks vary ±100 ppm. Using ICS's patented VCXO analog Phase-Locked Loop (PLL) techniques, device uses inexpensive 13.5 pullable crystal input produce skew output clocks. manufactures large variety Set-Top multimedia clock synthesizers applications. more clock outputs needed, MK277x family parts. Consult eliminate VCXOs, crystals oscillators from your board.
Features
Packaged 16-pin narrow SOIC Uses inexpensive 13.5 crystal On-chip VCXO (patented) with pull range
(minimum)
VCXO tuning voltage Zero synthesis error clocks skew output clocks maximum CMOS level outputs with output drive capability levels
Advanced, power, sub-micron CMOS process operating voltage
Block Diagram
S2:0
CLK1 PLL/Clock Synthesis Circuitry CLK2
13.5 Pullable Crystal
Voltage Controlled Crystal Oscillator
(both outputs)
2731-01
Race Stre 5126
Revision 021804 97-12
MK2731-01 COST VCXO
Assignment
CLK1 CLK2
Output Clock Select Table
Input
13.5 13.5 13.5 13.5 13.5
CLK1
33.33 24.576
CLK2
66.66 49.152
Test
16-pin narrow (150 mil) SOIC
(All outputs stopped low)
Descriptions
Number
Name
CLK1 CLK2
Type
Output Input Power Input Power Power Input Output Input Input Output Power Power Input -Power
Crystal connection. Connect 13.5 pullable crystal. Crystal connection. Connect 13.5 pullable crystal. Connect Voltage input VCXO. Zero signal which controls VCXO frequency. Connect ground. Connect ground. Output Enable. Active high. Tri-states both outputs when low. Clock output determined status table above. Fixed Clock Select Selects outputs table above. Fixed Clock Select Selects outputs table above. Clock output determined status table above. Connect ground. Connect Fixed Clock Select Selects outputs table above. connect. Connect
2731-01 grated Circuit Systems
Street, Jose, 9512
Revision 021804 297-1
MK2731-01 COST VCXO
External Component Selection
MK2731-01 requires minimum number external components proper operation.
Crystal Tuning Load Capacitors
crystal traces should include pads small fixed capacitors, between ground, another between ground. Stuffing these capacitors optional. need these capacitors determined system prototype evaluation, influenced particular crystal used (manufacture frequency) layout. typical required capacitor value procedure determining value these capacitors found application note MAN05.
Decoupling Capacitors
Decoupling capacitors 0.01µF should connected between GND, close MK2731-01 possible. optimum device performance, decoupling capacitors should mounted component side PCB. Avoid vias decoupling circuit.
Series Termination Resistor
When traces between clock outputs loads over inch, series termination should used. series terminate trace commonly used trace impedance) place resistor series with clock line, close clock output possible. nominal impedance clock output
Quartz Crystal
MK2731-01 VCXO function consists external crystal integrated VCXO oscillator circuit. assure best system performance (frequency pull range) reliability, crystal device meeting ICS' recommended parameters must used, layout guidelines discussed following section must followed. Application Note MAN05 full list crystal parameters. frequency oscillation quartz crystal determined "cut" load capacitors connected MK2731-01 incorporates on-chip variable load capacitors that "pull" (change) frequency crystal. crystal specified with MK2731-01 designed have zero frequency error when total on-chip stray capacitance external crystal must connected close chip possible should same side MK2731-01. There should via's between crystal pins device pins. There should signal traces underneath close crystal.
2731-01 grated Circuit Systems
Street, Jose, 9512
Revision 021804 297-1
MK2731-01 COST VCXO
Absolute Maximum Ratings
Stresses above ratings listed below cause permanent damage MK2731-01. These ratings, which standard values commercially rated parts, stress ratings only. Functional operation device these other conditions above those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect product reliability. Electrical parameters guaranteed only over recommended operating temperature range.
Item
Supply Voltage, Inputs Outputs Ambient Operating Temperature Storage Temperature Soldering Temperature
Rating
-0.5 VDD+0.5 +70°C +150°C 260°C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature Power Supply Voltage (measured respect GND) Reference crystal parameters
Min.
+4.75
Typ.
Max.
+5.25
Units
Refer page
Electrical Characteristics
VDD=3.3 Ambient temperature +70°C, unless stated otherwise
Parameter
Operating Voltage Output High Voltage Output Voltage Output High Voltage (CMOS Level) Input High Voltage only) Input High Voltage Input Voltage only) Input Voltage Operating Supply Current Short Circuit Current VIN, VCXO Control Voltage Frequency Synthesis Error Input Capacitance
Symbol
Conditions
Min.
4.75
Typ.
Max.
5.25
Units
VDD-0.4
load, S2:0 Each output clocks
±100
2731-01 grated Circuit Systems
Street, Jose, 9512
Revision 021804 297-1
MK2731-01 COST VCXO
Electrical Characteristics
±5%, Ambient Temperature +70° unless stated otherwise
Parameter
CLK1 CLK2 Output Pullability Input Crystal Frequency Input Crystal Accuracy Output Clock Rise Time Output Clock Fall Time Output Clock Duty Cycle Maximum Absolute Jitter, short term Skew CLK1 (with respect CLK2)
Symbol
Conditions
Note
Min.
+100
Typ.
Max. Units
13.5 2.0V 0.8V Measured 1.4V CL=15pF Measured 1.4V
Note External crystal device must conform with Pullable Crystal Specifications listed page
Thermal Characteristics
Parameter
Thermal Resistance Junction Ambient
Symbol
Conditions
Still flow flow
Min.
Typ.
Max. Units
°C/W °C/W °C/W °C/W
Thermal Resistance Junction Case
2731-01 grated Circuit Systems
Street, Jose, 9512
Revision 021804 297-1
MK2731-01 COST VCXO
Package Outline Package Dimensions (16-pin SOIC)
Package dimensions kept current with JEDEC Publication
Millimeters Symbol
Inches
INDEX AREA
1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 9.80 10.00 3.80 4.00 1.27 BASIC 5.80 6.20 0.25 0.50 0.40 1.27
.0532 .0688 .0040 .0098 .013 .020 .0075 .0098 .3859 .3937 .1497 .1574 0.050 BASIC .2284 .2440 .010 .020 .016 .050
SEATING PLANE
(.004)
Ordering Information
Part Order Number
MK2731-01G MK2731-01GTR
Marking
MK2731-01 MK2731-01
Shipping packaging
Tubes Tape Reel
Package
16-pin SOIC 16-pin SOIC
Temperature
+70° +70°
While information presented herein been checked both accuracy reliability, Integrated Circuit Systems (ICS) 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.
2731-01 grated Circuit Systems
Street, Jose, 9512
Revision 021804 297-1

COST VCXO MK2731-01 cost, jitter, high-performance VCXO clock syn

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