LC72121, LC72121M, LC72121V PLL Frequency Synthesizer for Electronic Tuning Overview www.onsemi.com The LC72121, LC72121M and LC72121V are high input sensitivity (20 mVrms at 130 MHz) PLL frequency synthesizers for 3 V systems. These ICs are serial data (CCB*) compatible with the LC72131, and feature the improved input sensitivity and lower spurious radiation (provided by a redesigned ground system) required in high-performance AM/FM tuners. Functions High-speed programmable divider PDIP22 / DIP22S (300 mil) FMIN: 10 to 160 MHz ... Pulse swallower technique LC72121 (With built-in divide-by-2 prescaler) AMIN: 2 to 40 MHz ... Pulse swallower technique 0.5 to 10 MHz ... Direct division technique IF counter IFIN: 0.4 to 15 MHz ... For AM and FM IF counting Reference frequency One of 12 reference frequencies can be selected (using a 4.5 or 7.2 MHz crystal element) 1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 15, 25, 50, and 100 kHz SOIC24 W / MFP24S (300 mil) Phase comparator LC72121M Supports dead zone control. Built-in unlocked state detection circuit Built-in deadlock clear circuit An MOS transistor for an active low-pass filter is built in I/O ports Output-only ports: 4 pins I/O ports: 2 pins Supports the output of a clock time base signal SSOP24 (275mil) Operating ranges LC72121V Supply voltage: 2.7 to 3.6 V Operating temperature: 40 to 85C Package DIP22S, MFP24S, SSOP24 * Computer Control Bus (CCB) is an ON Semiconductors original bus format and the bus addresses are controlled by ON Semiconductor. ORDERING INFORMATION See detailed ordering and shipping information on page 26 of this data sheet. Semiconductor Components Industries, LLC, 2017 1 Publication Order Number : July 2017 - Rev. 1 LC72121 M V/D LC72121, LC72121M, LC72121V Comparison with the LC72131/M Serial data compatible (CCB) Identical pin functions Two VSS pins were added The DIP version is pin compatible (VSS pins were inserted as the DIP22S NC pins) The MFP product provides a modified pin assignment (The MFP20 package was replaced by an MFP24 package, and extra VSS pins were added) The SSOP24 is a newly developed package that has the same pin assignment as the MFP24S product Pin Assignment www.onsemi.com 2