DescriptionThe LC72140 is designed as a high performance phase-locked loop (PLL) frequency synthesizer that operate over the VHF, MW and LW wave bands. It feature excellent frequency tracking, making it ideal as a reference frequency source for use in AM/FM radio receivers.
LC72140 has ten features. (1)High speed programmable dividers for 10 to 160MHz on FMIN using pulse swallower and 0.5 to 40MHz on AMIN using pulse swallower and direct division. (2)General purpose counters (used toghter with the SD in IF count mode). (3)4.5 or 7.2MHz crystal. (4)Twelve selectable reference frequencies (1,3,5,9,10,3,125,6,25,12,5,25,30,50 and 100kHz). (5)Phase comparator insensitive band control, unclock detection, sub-charge pump for high speed locking and deadlock clear circuit. (6)C2B input/output data interface. (7)Power-on reset circuit. (8)Built-in MOS transistor for a low-pass filter. (8)Inouts/outputs (using five general purpose input/output ports). (9)5V supply. (10)24-pin DIP. Those are all the main features.
Some absolute maximum ratings of LC72140 have been concluded into several points as follow. (1)supply voltage range would be from -0.3V to 7V. (2)Its CE, CL and DI input voltage range would be from -0.3V to 7V. (3)Its I/O1 to I/O3 input voltage range would be from -0.3V to 15V. (4)Its input voltage range for all other pins would be from -0.3V to Vdd+0.3V. (5)Its DO output voltage range would be from -0.3V to 7V. (6)Its I/O1 to I/O3 and AOUT output voltage range would be from -0.3V to 15V. (7)Its output voltage range for all other pins would be from -0.3V to Vdd+0.3V. (8)Its IO4, IO5, O6 and O7 output current range would be from 0mA to 3mA. (9)Its IO1 to IO3, DO and AOUT output current range would be from 0mA to 6mA. (10)Its power dissipation would be 350mW. (11)Its operating temperature range would be from -40°C to 85°C. (12)Its storage temperature range would be from -55°C to 125°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!
LC72140 Data Sheet
