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LC72146M - PLL Frequency Synthesizer

Description

of the structure of the programmable divider.

With the CTC bit in the serial data set to 0 With the CTC bit in the serial data set to 1 See the description of the serial data timing.

40 to +85°C, VSS = 0 V Parameter Symbol Rf1 Rf2 Internal feedback resist

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.

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Full PDF Text Transcription

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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.
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