The silicon tuner is at the heart of broadband applications, and Our product, the MC44C800, offers a cost-effective, high-performance "cable tuner-on-a-chip." This silicon tuner IC is a highly integrated, single-chip broadband tuner. The part is fabricated in a low-cost CMOS process. It receives 54 MHz to 861 MHz cable signals and converts them to a second IF of 36 MHz to 46 MHz.
Typical applications for the MC44C800 include cable data modems, cable digital and analog set-top boxes, and VoIP telephony boxes. This tuner is designed to meet all DOCSIS™ 1.1 specs for 64 and 256 quadrature amplitude modulation (QAM).
The MC44C800 has a fixed gain LNA and combines with an external pin diode attenuator to provide analog variable gain control. This single-chip broadband tuner uses a double conversion architecture with an external first IF SAW filter at 1120 MHz. The double conversion architecture replaces the front-end tracking filters and their manually aligned coils with an inexpensive fixed-frequency SAW filter at 1120 MHz.
To receive a copy of the Silicon Tuner Hardware Specification, please fill out and submit a request form.