U6239B

www.DataSheet4U.com U6239B 2.9 GHz PLL for SAT TV Tuner with UNi-Bus Description The U6239B is a single-chip frequency synthesizer with bidirectional I2C bus control and unidirectional 3-wire bus control, developed for SAT TV-tuner and cable tuner applications. This IC contains an integrated preamplifier, a high frequency prescaler, a reference divider with multiple programmable divider ratios, a crystal oscillator, a phase/ frequency detector together with a charge pump, a tuning amplifier and an analog-to-digital converter. Features D 2.9 GHz divide-by-16 prescaler integrated D UNi-BUS: I2C bus and 3-wire bus I2C bus software compatible to U6223B 3-wire bus software compatible to LC7215 (Sanyo) D I2C bus mode: 4 bidirectional ports (open collector) 2 unidirectional ports (open collector) 5 level ADC or unidirectional port (open collector) Address mode select function (AMS, Pin 3): 3 or 4 addresses selectable via Pin 10 D 3-wire bus mode: 4 unidirectional ports (open collector) Lock output (open collector) D Programmable reference divider D Low power consumption (typ. 5 V / 23 mA) D Electrostatic protection according to MIL-STD 883 Block Diagram AS / ENABLE / P3 10 SCL 5 SDA 4 UNI–BUS Control 11 P0/Lock 5–bit Latch ADC I/O Ports 7–bit Latch 8–bit Latch 7–bit Latch T1 9 P4 8 P5 7 P6 / ADC 6 P7 Vs 12 GND 15 Power–on reset POR 14–bit Shift Reg. Sync 15–bit Latch LOCK T0 5I RD1,2,3 OS AMS RFi 14 13 div. by 16 Prescaler SET 15/14–bit counter RDS divide by 256/512/...