CLC5903VLA

Overview

The CLC5903VLA is a dual digital tuner and automatic gain control (AGC) integrated circuit manufactured by National Semiconductor, now part of Texas Instruments. It functions as a two-channel digital downconverter designed for RF signal processing applications. The device operates within a frequency range of 52MHz to 78MHz and supports high-order modulation schemes including 128-QAM. It is housed in a 128-lead QFP package measuring 20x14 mm. The component integrates AGC functionality to manage signal levels across its dual channels, facilitating precise digital tuning and conversion for communication systems.

Feature Summary

• Dual-channel digital downconversion architecture
• Integrated automatic gain control mechanism
• Support for complex modulation formats such as 128-QAM
• Operational frequency coverage from 52MHz to 78MHz

Applications

• Digital television receiver front-ends
• RF signal processing modules
• Communication system demodulation stages
• Broadband data transmission equipment

Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the specific suffix 'VLA' matches the required package variant and temperature rating. Confirm that the 128-lead QFP footprint aligns with your PCB design constraints. Cross-reference the datasheet revision history to ensure compatibility with current production standards and regulatory compliance requirements.

Selection Notes

Select this component when a dual-channel solution with integrated AGC is required for frequencies between 52MHz and 78MHz. Consider the 128-lead QFP package size for board space limitations. Evaluate the need for 128-QAM support if high-density modulation is necessary. Compare against single-channel alternatives if only one path is needed to reduce complexity and cost.

Part Context

The CLC5903 series belongs to National Semiconductor's portfolio of RF mixed-signal ICs. Following the acquisition by Texas Instruments, these products are managed under TI's analog and embedded processing divisions. The VLA suffix typically denotes a specific package configuration and thermal rating within the broader CLC5903 family, distinguishing it from other pinout or performance variants.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official Texas Instruments resources for direct replacements or cross-references. Verify pin-to-pin compatibility and electrical parameter equivalence before considering any alternative components.