CX24109-11Z,557

Video Processing Overview

The CX24109-11Z,557 is a highly integrated direct down-conversion digital satellite tuner designed for high-volume digital video, audio, and data receivers. It operates on a single +5 V supply and utilizes a zero-IF architecture to eliminate image reject filtering requirements. The device integrates an LNA, variable RF attenuator, quadrature downconverter, baseband amplifiers, tunable low-pass filters, and a local oscillator with an onboard VCO and synthesizer. It provides I/Q baseband outputs and supports symbol rates from 1 to 45 MSps when paired with compatible demodulators.

Video Processing Feature Summary

• Zero-IF architecture eliminates the need for external image reject filtering
• Integrated local oscillator with onboard VCO and synthesizer requiring only a 5 V supply
• Single +5 V power supply operation simplifies system design
• Integrated low-noise amplifier (LNA) and variable gain control stages

Video Processing Applications

• DBS set-top boxes
• Commercial digital video, audio, and data receivers
• Digital VCRs

Video Processing Procurement Notes

Verify that the ordering suffix Z,557 corresponds to the specific tape-and-reel packaging configuration required for your assembly line. Confirm the package type matches the 48-pin eTQFP footprint in your PCB layout. Ensure compatibility with the intended demodulator/FEC IC for AGC and filter control signals. Check current NXP distribution channels for availability as this component originates from legacy Conexant technology.

Video Processing Selection Notes

Select this tuner for applications requiring a complete broadband satellite front-end solution with minimal external components. It is suitable for designs needing integrated frequency synthesis without high-voltage supplies. Consider pairing it with the CX24121 QPSK demodulator for a full reception chain. Evaluate the serial programming interface requirements for host processor integration.

Video Processing Part Context

The CX24109 represents a transition of Conexant satellite tuner technology into the NXP portfolio. It serves as a core component in the signal chain for receiving satellite broadcasts, converting L-band signals directly to baseband. This part is distinct from general-purpose RF mixers or tuners due to its specialized integration for DVB and DSS standards.

Video Processing Replacement Considerations

The CX24109-11 is the standard equivalent part number. Verify pinout and electrical specifications against any potential cross-reference devices from other manufacturers before substitution.