U6239B Datasheet, PDF (1/15 Pages) TEMIC Semiconductors – 2.9 GHz PLL for SAT TV Tuner with UNi-Bus

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
5–bit Latch
Vs 12
Power–on
reset
POR
GND 15
T1
7–bit Latch
8–bit Latch
7–bit Latch
14–bit Shift Reg.
14
RFi
13
RDS / AMS 3
XTAL 2
Sync 15–bit Latch
T0 5I RD1,2,3
LOCK
AMS SET
div. by 16
15/14–bit
FP
Prescaler
counter
Oscillator
RDS
Phase Charge
detector _pump
divide by 256/512/off/1024
divide by 25/50/140/250
FR
divide by 50/100/280/500
Figure 1.
ADC
I/O
Ports
11 P0/Lock
9 P4
8 P5
7 P6 / ADC
6 P7
OS
16 VD
1 PD
9611809
TELEFUNKEN Semiconductors
Rev. A3, 28-May-97
1 (15)