GENERAL DESCRIPTION
The TSA5515T 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 three output ports and set the charge-pump current. A flag is set when the loop is “in-lock”. Another flag is set when a power dip occurs on the supply line. These flags are read out of the TSA5515T on SDA line (one status byte) during a READ operation. The device has 4 programmable addresses, programmed by applying a specific voltage on the AS pin. The phase comparator operates at 7.8125 kHz when a 4 MHz crystal is used.
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, etc.
• 3 bus-controlled output ports
• Power-down flag
• Available in SOT108A package
APPLICATIONS
• TV tuners
• VCR tuners
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