TSA5511 1.3 GHz Bidirectional I2C-bus controlled synthesizer

FEATURES

· Complete 1.3 GHz single chip system

· Low power 5 V, 35 mA

· I2C-bus programming

· In-lock flag

· Varicap drive disable

· Low radiation

· Address selection for Picture-In-Picture (PIP), DBS

tuner (3 addresses)

· Analog-to-digital converter

· 8 bus controlled ports (5 for TSA5511T), 4 current

limited outputs (1 for TSA5511T), 4 open collector

outputs (bi-directional)

· Power-down flag

APPLICATIONS

· TV tuners

· VCR Tuners

GENERAL DESCRIPTION

The tsa5511 is a single chip PLL frequency synthesizer

designed for TV tuning systems. Control data is entered

via the I2C-bus; five serial bytes are required to address

the device, select the oscillator frequency, programme the

eight output ports and set the charge-pump current. Four

of these ports can also be used as input ports (three

general purpose I/O ports, one ADC). Digital information

concerning those ports can be read out of the TSA5511 on

the SDA line (one status byte) during a READ operation.

A flag is set when the loop is in-lock and is read during a

READ operation. The device has one fixed I2C-bus

address and 3 programmable addresses, programmed by

applying a specific voltage on Port 3. The phase

comparator operates at 7.8125 kHz when a 4 MHz crystal

is used.

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