NJW1508

NJW1504/1508 PLL Synthesizer with I2C Bus for TV Tuner n DESCRIPTION The NJW1504/1508 are a PLL frequency synthesizer especially designed for TV and VCR tuning systems and consists of PLL circuit and a prescaler which operates up to 1.0GHz, built into one chip. The NJW1504/1508 are controlled through an I2C-bus. n FEATURES Operating Voltage 5V Low Operating Current : 15mA typ. @Vcc=5V Prescaler accepts frequencies up to 1GHz on chip Reference Signal : NJW1504: Reference Signal Oscillator with peripheral of Xtal on chip NJW1508: Buffer Amplifier for External Reference Signal on chip 34V max. tuning voltage output Package Outline: SSOP16 n PACKAGE OUTLINE NJW1504V/NJW1508V n BLOCK DIAGRAM BS0-BS3 VCC3 VCC1 5V GND BAND SW 4bit 4bit Latch I2C BRuesceive r HF IN CP VCC2 PreAMP 1/8 Programmable Divider 15bit AMPOUT AMP Phase OUT Phase Comp. 15bit Latch 8bit Latch 1/1024 1/512 (1/640) Ref. Divider X’tal OSC ADRS SDA SCL OSCOUT XTAL (Note) Purc...