LC72146

Ordering number : 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. Package Dimensions unit: mm 3067-DIP24S [LC72146] Features High-speed programmable dividers for — 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 Reference frequencies: Twelve selectable reference frequencies (4.5 or 7.2 MHz crystal) 1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 25, 30, 50 and 100 kHz Phase comparator — Insensitive band control — Unlock detection — Sub-charge pump for high-speed locking — Deadlock clear circuit CCB input/output data interface Power-on reset circuit Built-in MOS transistor for a low-pass filter Inputs/outputs (using five general-purpose input/output ports) — Maximum of seven inputs (max) — Maximum of seven outputs (max/four n-channel open-drain and three CMOS outputs) — Time-base output for clock (8 Hz) Operating ranges — Supply voltage ..................................4.5 to 5.5 V — Opetating temperature ......................–40 to 85°C Package — DIP24S, MFP24S CCB ...