LC72134M
Overview
The LC72134M is a dual PLL frequency synthesizer product that integrates on a single chip both an AM/FM audio broadcast reception PLL circuit (main PLL) and a dedicated FM multiplex reception PLL circuit (sub PLL). Since the main PLL circuit is equivalent to the LC72135M, software developed for that product can be used with this chip. The sub-PLL circuit can be controlled independently.
Functions
- High-speed programmable divider
- FMINa (main): 10 to 160 MHz ... Pulse swallower technique (With built-in divide-by-2 prescaler)
- FMINb (sub): 10 to 160 MHz ... Pulse swallower technique (With built-in divide-by-2 prescaler)
- AMIN (main): 0.5 to 40 MHz ... Pulse swallower and direct division techniques
- IF counter
- Two input pins provided: IFIN1 and IFIN2
- IFIN1: 0.4 to 25 MHz ... For AM and FM IF counting
- IFIN2: 0.4 to 25 MHz ... For AM and FM IF counting
- Reference frequency
- One of 12 reference frequencies can be selected (using a 4.5 or 7.2 MHz crystal element) 1, 3,...
