TDA18254AHN中文资料恩XP数据手册PDF规格书

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