Overview
The LC72147V is a PLL frequency synthesizer for car audio systems. It can implement high-performance multifunction tuners and features a crystal oscillator circuit that supports AM up-conversion, a fast locking circuit, an A/D converter, and an LA1783/1750 IF counter buffer control pin.

unctions
• High-speed programmable divider
   — FMIN: 10 to 180 MHz: Pulse swallower type
• IF counter
   — HCTR: 0.4 to 25 MHz: Frequency measurement
• Crystal oscillator: One of the following 4 frequencies
   may be selected: 10.35, 10.25, 7.2, and 4.5 MHz
   Reference frequency
   — One of 12 frequencies may be selected (when a 7.2
   or 4.5 MHz crystal is used)
   100*1, 50, 30*2, 25, 12.5, 6.25, 3.125, 10, 9*2, 5, 3*2,
   1 kHz
   Notes: 1. Cannot be used when a 10.35 or 10.25 MHz
                   crystal is used
              2. Cannot be used when a 10.25 MHz crystal
                  is used
• Phase comparator
   — Supports dead band control
   — Built-in unlock detection circuit
   — Sub-charge pump for fast locking
   — Built-in deadlock clearing circuit
• Built-in MOS transistor for forming an active low-pass
   filter
• I/O ports — General-purpose I/O: 5 pins
   — Output: n-channel: 3 pins, CMOS: 2 pins
   — IFBC pin (LA1783/1750 IF counter buffer control
   pin)
• Serial data I/O
   — Supports communication with the controller in the
   CCB format.
• Operating ranges
   — Supply voltage (VDD): 4.5 to 6.5 V
   — Built-in regulator voltage (Vreg): 3.0 V (±10%)
   — Operating temperature: –40 to +85°C
• Package
   — SSOP-24