Overview

The LC72151V is a PLL frequency synthesizer for car audio systems. It can implement high-performance multifunction tuners such as RDS tuners and features a fast locking circuit.

Functions

? High-speed programmable divider

— FMIN: 10 to 160 MHz: Pulse swallower type

— AMIN: 2 to 40 MHz: Pulse swallower type

0.5 to 10 MHz: Direct division type

? IF counter

— HCTR: 0.4 to 25 MHz: for FM IF count

— LCTR: 10 to 500 kHz: for AM IF count

1.0 to 20 × 103 Hz: for frequency

measurement

? Reference frequency

— One of 11 frequencies may be selected (when a 10.25 or 10.35 MHz crystal is used)

50, 30*, 25, 12.5, 10, 9*, 6.25, 5, 3.125, 3*, 1 kHz

Note: Cannot be used when a 10.25 MHz crystal is used

? Phase comparator

— Supports dead band control

— Built-in unlock detection circuit

— Built-in deadlock clearing circuit

? Built-in amplifier for forming an active low-pass filter

— Built-in operational amplifier for FM high-speed

locking

— Built-in MOS transistor for AM tuning

? Built-in crystal oscillator output buffer

? I/O ports — General-purpose I/O: 2 pins

— Four input ports (maximum)

— Three output ports (maximum)

? Serial data I/O

— Supports communication with the controller in the CCB format.

? Operating ranges

— Supply voltage: 4.5 to 5.5 V (VDD) 7.5 to 9.5 V (AVDD)

— Operating temperature: –40 to +85°C

? Package

— SSOP30