PLL Frequency Synthesizer Circuit With Serial Interface: ML145170
Lansdale Semiconductor, Inc. has reintroduced the ML145170 PLL Frequency Synthesizer circuit with a serial interface. This single-chip synthesizer is capable of direct usage in the MF (Medium Frequency), HF (High Frequency), and VHF (Very High Frequency) bands, and is designed for equipment use. It supports a variety of applications including those using automotive products, programmable oscillators, transceivers, cellular devices, and computers.
The ML145170 utilizes a bit or byte oriented format, and a patented BitGrabber™ register so that no addresses or steering bits are required for random access of the three registers. Tuning can be accomplished via a 2-byte serial transfer to the 16 bit N register. The synthesizer also features fully programmable R and N counters, an amplifier at the Fin pin, on-ship support of an external crystal, a programmable reference output, and both single and double-ended phase detectors with linear transfer functions so that there are no dead zones.
For more features, specifications, and diagrams, download the available datasheet.