Am/fm Digital Phase-locked Loop Synthesizer

The DS8906 is a PLL synthesizer designed specifically for use in AM/FM Radios It contains the reference Oscillator a phase Comparator a Charge Pump a 120 MHz ECL/I2L dual modulus programmable divider, and a 20-bit shift regis- ter/latch for serial data entry. The device is designed to operate with a serial data controller generating the neces- sary division codes for each frequency, and Logic state infor- mation for Radio function inputs/outputs. The Colpitts reference Oscillator for the PLL operates at 4 MHz. A chain of dividers is used to generate a 500 kHz Clock signal for the external controller. Additional dividers generate a 12.5 kHz reference signal for FM and a 500 Hz reference signal for AM/SW. One of these reference signals is selected by the data from the controller for use by the phase Comparator Additional dividers are used to generate a 50 Hz Timing signal used by the controller for time-of- day. Data is transferred between the Frequency Synthesizer and the controller via a 3 wire bus system. This consists of a data input line, an enable line and a Clock line. When the enable line is low, data CAN be shifted from the controller into the Frequency Synthesizer When the enable line is tran- sitioned from low to high, data entry is disabled and data present in the Shift register is latched. By National Semiconductor Corporation
DS8906 's PackagesDS8906 's pdf datasheet
DS8906N




DS8906 Pinout, Pinouts
DS8906 pinout,Pin out
This is one package pinout of DS8906,If you need more pinouts please download DS8906's pdf datasheet.

DS8906 circuits will be updated soon..., now you can download the pdf datasheet to check the circuits!

Related Electronics Part Number

Related Keywords:

DS8906 Pb-Free DS8906 Cross Reference DS8906 Schematic DS8906 Distributor
DS8906 Application Notes DS8906 RoHS DS8906 Circuits DS8906 footprint