MK1432 MK1434 cost, high performance triple clock synthesizers green l

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MK1432 MK1434 cost, high performance triple clock synthesizers green l

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MK1432/MK1434 Green Local Clock Source
MK1432 MK1434 cost, high performance triple clock synthesizers green local desktop notebook applications. Using analog Phase-Locked Loop (PLL) techniques, devices accept 14.318 crystal input produce multiple output clocks MHz. They provide selectable 2XCPU CPU, selectable local clock, clock, fixed peripheral clock. chips support buses. fixed clock either 24MHz 40MHz. devices operate 3.3V including 80MHz 2XCPU clock. Power Saving causes clocks smoothly transition 33.33 Pentiums, 16.67 486DX4. addition, single made slow DX2s MHz.
Packaged narrow (150 mil) SOIC Supports PentiumProcessor timing specs Supports synchronous asynchronous local Selectable local frequencies 50MHz SCSI 40MHz clock MK1434 Floppy super clock MK1432 Single Power Saving switches power mode (for Pentium) 3.3V 80MHz) operation Smooth transitions Pentium based Green skew (<250ps) Pentium compatible outputs Duty cycle 45/55 25mA output drive capability levels Compatible with popular microprocessors Packaged narrow SOIC Early Clock support, consult MicroClock
Block Diagram
Clocks Output Buffer Output Buffer
2XCPU
BCLKS
Local Clock Fixed Clock Crystal Oscillator
Output Buffer
BCLK
14.318 crystal
Output Buffer
40.00 (MK1434) 24.00 (MK1432)
Output Buffer
14.318
1432
Revision 060101
Integrated Circuit Systems, Inc. Race Street Jose 95126 (408)295-9800 www.icst.com
MK1432/MK1434 Green Local Clock Source
Assignment
BCLK 2XCPU 14.3M BCLKS BCLK 2XCPU 14.3M BCLKS
Clock Decoding Table MHz) 2XCPU 16.00 8.00 100.00 note 350.00 note3 80.00 40.00 75.00 37.50 40.00 20.00 50.00 25.00 66.66 33.33 60.00 30.00 33.33 16.67
Local Clock Decoding Table MHz) BCLKS BCLK (MHz) 25.00 33.33 50.00
Notes: Actual frequencies within 0.05% those shown. Transitions between mean frequencies smooth, violate Intel's 0.1% cycle specification. These selections guaranteed operate level. Leave tri-stated, unconnected, floating select this level. don't care (either
Descriptions
1432 1434 Name BCLK BCLKS 14.3M 2XCPU Type Description Select 2XCPU frequencies. table above. Internal Pull-Up. Crystal connection. Connect 14.31818 crystal. Crystal connection. Connect 14.31818 crystal clock. Connect 3.3V. Must same voltage Connect ground. Local Clock output. table above. 24.00 clock output (MK1432 only). 40.00 clock output (MK1434 only). Power Saving pin. Smoothly changes to/from 33.33 16.67 MHz. IPU. Local Clock Select pin. table above. Select 2XCPU frequencies. table above. Internal Pull-Up. 14.318 Reference Clock Output. Connect ground. Connect 3.3V. Must same voltage Clock output. table above frequencies. Clock output. table above frequencies. Select 2XCPU frequencies. table above. Internal Pull-Up.
Key: Tri-level Input, Input, output, power supply connection
1432
Revision 060101
Integrated Circuit Systems, Inc. Race Street Jose 95126 (408)295-9800 www.icst.com
MK1432/MK1434 Green Local Clock Source
Electrical Specifications
Parameter Conditions Minimum Typical Maximum Units ABSOLUTE MAXIMUM RATINGS (note Supply voltage, Referenced Inputs Clock Outputs Referenced -0.5 VDD+0.5 Ambient Operating Temperature Soldering Temperature seconds Storage temperature CHARACTERISTICS (VDD unless noted) Operating Voltage, Input High Voltage, Input Voltage, Mid-level Input High Voltage, only VDD-0.5 Mid-level Input Voltage, only Output High Voltage, IOH=-25mA Output Voltage, IOL=25mA Output High Voltage, VDD=3.3V, IOH=-8mA Output Voltage, VDD=3.3V, IOL=8mA Operating Supply Current, Load, note Operating Supply Current, IDDPS Load, PS=0 Short Circuit Current Each output (except ±100 On-Chip Pull-up Resistor Pins Input Capacitance CHARACTERISTICS (VDD unless noted) Input Frequency 14.31818 Output Clock Rise Time 2.0V Output Clock Fall Time 0.8V Output Clock Duty Cycle VDD/2 Cycle Cycle Jitter, Clocks 1000 Absolute Clock Period Jitter 14-40 clocks -500 Skew 2XCPU with respect Rising edges 1.5V -250 Transition time, 33.3MHz 66.6MHz VDD=3.3 Transition time, 66.6MHz 33.3MHz VDD=3.3 Notes: 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. With 2XCPU clock 66.66MHz, BCLK 33.33MHz External Components MK1432/4 requires minimum number external components proper operation. Decoupling capacitors 0.1µF should connected between GND, close MK1432/4 possible. series termination resistor used each clock output. device does require (nor recommend) capacitors connected crystal pins. 14.31818 crystal must connected close chip possible. Recommended load capacitance crystal 12pF.
1432
Revision 060101
Integrated Circuit Systems, Inc. Race Street Jose 95126 (408)295-9800 www.icst.com
MK1432/MK1434 Green Local Clock Source
Package Outline Package Dimensions
SOIC narrow Inches Symbol 0.055 0.070 0.013 0.019 0.007 0.010 0.385 0.400 0.150 0.160 0.225 0.245 .050 0.016 0.004 0.01 Millimeters 1.397 1.778 0.330 0.483 0.191 0.254 9.779 10.160 3.810 4.064 5.715 6.223 1.27 0.406 0.102 0.254
Ordering Information
Part/Order Number MK1432S MK1434S MK1432STR MK1434STR Marking MK1432S MK1434S MK1432S MK1434S Fixed Output Clock Frequency Package SOIC SOIC Tape Reel Tape Reel Temperature 0-70°C 0-70°C
While information presented herein been checked both accuracy reliability, MicroClock 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 MicroClock. MicroClock reserves right change circuitry specifications without notice. MicroClock does authorize warrant MicroClock product life support devices critical medical instruments.
Pentiumis registered trademark Intel Corporation 1432
Revision 060101
Integrated Circuit Systems, Inc. Race Street Jose 95126 (408)295-9800 www.icst.com

MK1432 MK1434 cost, high performance triple clock synthesizers green l

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