General description

The TDA18254AHN is a Silicon Tuner IC designed specifically for high definition multi-tuner cable Set Top Boxes (STB) supporting single streaming and multi-streaming PVR STBs with watch, record, Video-On-Demand (VOD) and in-home video distribution capability.

Features and benefits

 Supports 4 tuner functions specifically aimed for PVR boxes:

   1 × low IF output

   3 × RF outputs to drive slave tuners

 Integrated wideband gain control

 Extended frequency coverage up to 1002 MHz

 Integrated RF tracking filters for rejection of unwanted signals

 Single 3.3 V power supply

 Low power consumption

 Multistandard cable receptions

 Enhanced RF and IF filters to increase selectivity and adjacent channels filtering

 RF loop-through

 Fully integrated IF selectivity, eliminating the need for external SAW filters

 Alignment free

 Fully integrated oscillators:

   No external oscillator components for reduced cost

   16 MHz crystal oscillator output buffer for single crystal applications

 I2C-bus provides:

   3.3 V microcontroller compatibility

   Received Signal Strength Indicator (RSSI) data access

   Die temperature sensor data access

 Lead-free (Pb) manufacturing