Spread Spectrum Multiplier Clock MK1714-01 cost, high performance
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MK1714-01
Spread Spectrum Multiplier Clock
MK1714-01 cost, high performance clock synthesizer with selectable multipliers percentages spread spectrum designed generate high frequency clocks with EMI. Using analog/digital Phase Locked Loop (PLL) techniques, device accepts inexpensive, fundamental mode, parallel resonant crystal clock input produce spread dithered output. This reduces amplitude peaks harmonics several places both outputs into high impedance state board level testing. powers down entire chip outputs held low. MK1714-02 other selections input ranges spreads.
Features
Packaged tiny SSOP Operating voltage 3.3V Multiplier modes Inexpensive crystal clock input tri-states outputs board testing Power down stops outputs Selectable frequency spread Spread turned Advanced, power CMOS process Duty cycle 40/60 Industrial temperature range available Input frequency (depending mode) Output frequency (depending mode)
Block Diagram
S4:0 Enable
Clock ultiplier Spread Spectrum Circuitry
lock
Input rystal lock
Crystal scillator
XSEL
(both outputs)
1714-01
Revision 041003
Integrated Circuit Systems, Inc. Race Street, Jose, 95126 (408) 295-9800 www.icst.com
MK1714-01 Spread Spectrum Multiplier Clock
Assignment
XSEL
(150 mil) SSOP (QSOP)
Descriptions
Number Name XSEL Type Power Power Input Input Power Power Input Description Crystal connection. Connect parallel mode crystal. Leave open clock. Crystal connection. Connect parallel mode crystal clock. Connect VDD. Must same value other VDD. Connect VDD. Must same value other VDD. Select Determines multiplier spread amount table following page. Internal pull-down. Select Determines multiplier spread amount table following page. Internal pull-up. Connect ground. Connect ground. Select Determines multiplier spread amount table following page. Internal pull-up. Connect crystal input, input. Internal pull-down. Enable. Turns spread spectrum when high. Internal pull-up. Connect ground. Select Determines multiplier spread amount table following page. Internal pull-up. connect. connect anything this pin. Select Determines multiplier spread amount table following page. Internal pull-up. Connect ground. Power down. Turns chip when low. Outputs stop low. Leave open connected power down required. Output enable. Tri-states outputs when low. Internal pull-up.
Output Clock output dependent input, multiplier, spread amount table following page. Input Input Power Input Input Power Input Input
Output Reference clock output from crystal oscillator. This clock spread.
Note: When changing input frequency, must minimum 10µs allow lock frequency. Alternatively, while changing frequencies.
1714-01
Revision 041003
Integrated Circuit Systems, Inc. Race Street, Jose, 95126 (408) 295-9800 www.icst.com
MK1714-01 Spread Spectrum Multiplier Clock
Clock Output Select Table (MHz)
Input Range 13.33 Multiplier test test test Output Range -140 Direction Amount ±1.25 ±0.5 ±0.5 +0.25, -1.25 +0.5, ±0.5 +0.5, -1.5 +0.5, -1.5 +0.5, -1.5 -2.5 +0.5, -1.5 -1.5 ±0.5 +0.25, -1.25 +0.5, +0.5, +0.25, -1.25 +0.5, -1.5 +0.5, +0.5, -1.5
S4:S0, connect GND, connect VDD. Direction: center spread, down spread, down center spread. Amount spread amount. example, output clock spread down lowest frequency 39.60 MHz. Contact (ics-mk@icst.com) with your exact output frequency details spread direction amount.
1714-01
Revision 041003
Integrated Circuit Systems, Inc. Race Street, Jose, 95126 (408) 295-9800 www.icst.com
MK1714-01 Spread Spectrum Multiplier Clock
External Components
MK1714-01 requires minimum number external components proper operation. 0.01µF decoupling capacitor should mounted component side board close possible. vias should used between decoupling capacitor pin. trace should kept short possible, should trace ground via. Distance ferrite bead bulk decoupling from device less critical. external crystal should mounted just next device with short traces. traces should routed next each other with minimum spaces, instead they should separated away from other traces. minimize series termination resistor, needed, should placed close clock output. optimum layout with components same side board, minimizing vias through other signal layers (the ferrite bead bulk decoupling capacitor mounted back). Other signal traces should routed away from MK1714-01. This includes signal traces just underneath device, layers adjacent ground plane layer used device.
Decoupling Capacitor
decoupling capacitor 0.01µF must connected between GND, close these pins possible. optimum device performance, decoupling capacitor should mounted component side PCB. Avoid vias decoupling circuit.
Series Termination Resistor
When trace 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
Crystal Tuning Load Capacitors
Crystal Load Capacitors
device crystal connections should include pads small capacitors from ground from ground. These capacitors used adjust stray capacitance board match nominally required crystal load capacitance. Because load capacitance only increased this trimming process, important keep stray capacitance minimum using very short traces (and vias) been crystal device. Crystal capacitors must connected from each pins ground. value these crystal caps should equal (CL-6)*2. this equation, crystal load capacitance Example: crystal with load capacitance, each crystal capacitor would 6]*2 20pF. output frequency critical, external load capacitors necessary.
Powerup Considerations
insure proper operation spread spectrum generation circuit, some precautions must taken implementation MK1714-01. input signal should applied until stable (within final value). This requirement easily operating MK1714-01 source from same power supply. This requirement applicable crystal used. should enabled (taken high) until after power supplies input clock stable. This requirement direct control system logic; example, "power good" signal. Another solution leave unconnected place 0.01µF capacitor ground. pull-up resistor will charge capacitor provide approximately 700µs delay until spread spectrum enabled. input frequency changed during operation, disable spread spectrum until input clock stabilizes frequency.
Layout Recommendations
optimum device performance lowest output phase noise, following guidelines should observed.
1714-01
Revision 041003
Integrated Circuit Systems, Inc. Race Street, Jose, 95126 (408) 295-9800 www.icst.com
MK1714-01 Spread Spectrum Multiplier Clock
Absolute Maximum Ratings
Stresses above ratings listed below cause permanent damage MK1714-01. 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 Junction Temperature Soldering Temperature -0.5
Rating
-0.5V VDD+0.5V +85°C +150°C 175°C 260°C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature Power Supply Voltage (measured respect GND)
Min.
+3.0
Typ.
Max.
+5.5
Units
Electrical Characteristics
Unless stated otherwise, 3.3V Ambient Temperature +85°C
Parameter
Operating Voltage Supply Current Input High Voltage Input Voltage Output High Voltage Output Voltage Short Circuit Current Chip Pull-up Resistor, inputs On-Chip Pull-down Resistor, input Input Capacitance
Symbol
Conditions
load, 3.3V load, Select inputs, Select inputs, Each output Except only Except
Min.
Typ.
Max.
Units
VDD-0.4
1714-01
Revision 041003
Integrated Circuit Systems, Inc. Race Street, Jose, 95126 (408) 295-9800 www.icst.com
MK1714-01 Spread Spectrum Multiplier Clock
Electrical Characteristics
Unless stated otherwise, 3.3V Ambient Temperature +85°C
Parameter
Input Crystal Frequency Input Clock Frequency Output Rise Time Output Fall Time Sigma Jitter Absolute Jitter Output Clock Duty Cycle Output Frequency Output Frequency Synthesis Error
Symbol
Conditions
Min.
Typ.
Max. Units
2.0V 0.8V VDD/2 ±150
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
Marking Diagram
Marking Diagram Lead Free
MK1714-01R ####### YYWW
MK1714-01RLF ####### YYWW
Notes: ####### code. YYWW last digits year, week number that part assembled.
1714-01
Revision 041003
Integrated Circuit Systems, Inc. Race Street, Jose, 95126 (408) 295-9800 www.icst.com
MK1714-01 Spread Spectrum Multiplier Clock
Package Outline Package Dimensions SSOP, Mil. Body)
Package dimensions kept current with JEDEC Publication
Millimeters Symbol
Inches
INDEX AREA
1.35 1.75 0.10 0.25 -1.50 0.20 0.30 0.18 0.25 8.55 8.75 5.80 6.20 3.80 4.00 0.635 Basic 0.40 1.27
.053 .069 .0040 .010 -.059 0.008 0.012 .007 .010 .337 .344 .228 .244 .150 .157 0.025 Basic .016 .050
SEATING PLANE
(.004)
Ordering Information
Part Order Number
MK1714-01R MK1714-01RTR MK1714-01RI MK1714-01RITR MK1714-01RLF MK1714-01RLFTR
Marking
Shipping packaging
Tubes Tape Reel Tubes Tape Reel Tubes (lead free) Tape Reel (lead free)
Package
SSOP SSOP SSOP SSOP SSOP SSOP
Temperature
+70° +70° +70° +70°
page
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.
1714-01
Revision 041003
Integrated Circuit Systems, Inc. Race Street, Jose, 95126 (408) 295-9800 www.icst.com
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