LC72146 Overview
EN4922C CMOS LSI LC72146, 72146M PLL Frequency Synthesizer for Electronic Tuning Overview The LC72146 is a PLL frequency synthesizer LSI circuit for electronic tuning in car stereo systems. The LC72146 supports the construction of high-performance, multifunctional electronic tuning systems for the VHF MW, and LW bands.
LC72146 Key Features
- 10 to 160 MHz on FMIN using pulse swallower
- 0.5 to 40.0 MHz on AMIN using pulse swallower and direct division
- General-purpose counters
- HCTR for 0.4 to 25.0 MHz frequency measurement
- LCTR for 10 to 500 kHz frequency measurement and 1.0 Hz to 20 × 103 kHz period measurement
- Phase parator
- Insensitive band control
- Unlock detection
- Sub-charge pump for high-speed locking
- Deadlock clear circuit