Ds8908b Am/fm Digital Phase-locked Loop Frequency Synthesizer

The DS8908B is a PLL synthesizer designed specifically for use in AM/FM Radios It contains the reference Oscillator a phase Comparator a Charge Pump an Operational Amplifier a 120 MHz ECL/I2L dual modulus programmable divider, and a 19-bit Shift register latch for serial data entry. The device is designed to operate with a serial data controller generating the necesary division codes for each frequency, and Logic state information for Radio function inputs/outputs. A 3.96 MHz pierce Oscillator and divider chain generate a 1.98 MHz external controller Clock a 20 kHz, 10 kHz, 9 kHz, and a 1 kHz reference signals, and a 50 Hz time-of-day signal. The Oscillator and divider chain are sourced by the VCCM pin thus providing a low power controller Clock drive and time-of-day indication when the balance of the PLL is powered down. The 21-bit serial data steram is transferred between the fre- quency synthesizer and the controller via a 3-wire bus sys- tem comprised of a data line, a Clock line, and an enable line. By National Semiconductor Corporation
DS8908B 's PackagesDS8908B 's pdf datasheet

DS8908B Pinout, Pinouts
DS8908B pinout,Pin out
This is one package pinout of DS8908B,If you need more pinouts please download DS8908B's pdf datasheet.

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