MC44C801

MC44C800/801 MOTOROLA SEMICONDUCTOR TECHNICAL DATA Product Brief Single Chip CMOS Broadband Tuner The MC44C800/801 Silicon Tuner ICs are highly integrated single chip broadband tuners for cable data and set-top applications. They receive 50 MHz to 861 MHz cable signals and convert them to a second IF of 36 MHz to 46 MHz. Typical applications include Cable Data Modems, Cable Digital and Analog Settop boxes, VoIP Telephony boxes, etc. These tuners meet all DOCSIS requirements for 64 and 256 QAM. They utilize a double conversion architecture with an external first IF SAW filter at 1120 MHz, and a second IF in the range of 36 MHz to 46 MHz. Both the MC44C800 and the MC44C801 are identical, with the exception that the MC44C801 has a bus programmable variable gain LNA with 21 dB of gain control. The MC44C800 does not have the LNA. A summary of the features is given below: Integrated frequency synthesizers and prescalers. One fully integrated VCO and one VCO requiring only an external inductor. Up conversion mixer. Down conversion mixer. Variable Gain LNA with 21 dB gain control (MC44C801 only). Reference oscillator circuit (using an external 25 MHz crystal). Minimum CTB of – 66 dBc, CSO of –60 dBc and XMod of –57 dB with +3 dBmV AGC attack point. Typical noise figure of MC44C801 is 6.2 dB. Phase noise @ 10 KHz offset of –94 dBc/Hz, typical. Single 5 V supply operation. SPI bus interface. Internal self-diagnostic circuits. Power down mode with fast start-...