74vhc4046 National Semiconductor Corporation, 74vhc4046 Datasheet
74vhc4046
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74vhc4046 Summary of contents
Page 1
... CMOS Phase Lock Loop General Description The 74VHC4046 is a low power phase lock loop utilizing advanced silicon-gate CMOS technology to obtain high fre- quency operation both in the phase comparator and VCO sections This device contains a low power linear voltage controlled oscillator (VCO) a source follower and three ...
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Block and Connection Diagrams Pin Assignment for SOIC and PDIP TL F 11675 – 11675 – 1 ...
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Absolute Maximum Ratings Supply Voltage ( Input Voltage ( Output Voltage ( OUT Clamp Diode Current ( Output ...
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AC Electrical Characteristics Symbol Parameters AC Coupled C (series) e Input Sensitiv ity Signal Maximum Output r f Rise and Fall Time C Maximum Input IN Capacitance Phase Comparator Maximum Prop- PHL ...
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Typical Performance Characteristics Typical Center Frequency Typical Offset Frequency Typical Center Frequency 11675 – 3 Typical Offset Frequency ...
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Typical Performance Characteristics VHC4046 Typical VCO Power Dissipation Center Frequency VHC4046 VCO out CC VHC4046 VCO vs out e Temperature (Continued) VHC4046 Typical VCO Power Dissipation TL F 11675 ...
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Typical Performance Characteristics VHC4046 Typical Source Follower Power Dissipation vs RS VHC4046 Typical VCO Linearity vs R1 VCO WITHOUT OFFSET R2 (Continued) Typical 11675 – VHC4046 Typical VCO Linearity vs ...
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Comparator – Given f – Given – Use f with curve titled – Calculate f 0 center frequency equation f to determine R1 and C1 – Use f with ...
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Detailed Circuit Description the capacitor once the capacitor charges up to the thresh- old of the schmitt trigger the oscillator logic flips the capaci- tor over and causes the mirror to charge the opposite side of the capacitor The output ...
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Detailed Circuit Description Thus in normal operation V and ground voltage levels are CC fed to the loop filter This differs from some phase detectors which supply a current output to the loop filter and this should be considered in ...
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Detailed Circuit Description FIGURE 6 Logic Diagram for Phase Comparator II FIGURE 7 Typical Phase Comparator II Output Waveforms (Continued 11675 – 11675 – 23 ...
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Detailed Circuit Description means that the VCO’s frequency must be increased to bring its leading edge into proper phase alignment Thus the phase detector II output is set high This will cause the loop filter to charge up the VCO ...
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... The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows Physical Dimensions inches (millimeters) 16-Lead (0 150 Wide) Molded Small Outline Package JEDEC Order Number 74VHC4046M NS Package Number M16A 11675 – 26 ...
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... National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications Molded Dual-In-Line Package (N) Order Number 74VHC4046N NS Package Number N16E 2 A critical component is any component of a life ...