LC72121

• High-speed programmable divider
- FMIN: 10 to 160 MHz ... Pulse swallower technique (With built-in divide-by-2 prescaler)
- AMIN: 2 to 40 MHz ... Pulse swallower technique 0.5 to 10 MHz ... Direct division technique
• IF counter
- IFIN: 0.4 to 12 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, 5, 9, 10, 3.125, 6.25, 12.5, 15, 25, 50, or 100 kHz
• Phase comparator
- Supports dead zone control.
- Built-in unlocked state detection circuit
- Built-in deadlock clear circuit
• An MOS transistor for an active low-pass filter is built in.