LMK00804B-Q1

The LMK00804B-Q1 is a high-performance clock generator from Texas Instruments designed for automotive and industrial applications requiring precise timing control. It features four independent output channels, each capable of generating up to 300 MHz, making it suitable for driving high-speed data converters, FPGAs, and processors in demanding environments. The device supports flexible input reference sources, including crystal oscillators, LVCMOS, or differential clocks, enabling seamless integration into diverse system architectures. This clock generator includes integrated phase-locked loops (PLLs) with low-jitter performance—typically less than 500 fs RMS—ensuring signal integrity in critical timing paths. Its programmable dividers and multipliers allow fine-tuned frequency synthesis, supporting a wide range of output frequencies from 10 kHz to 300 MHz. The LMK00804B-Q1 also offers configurable output formats such as LVDS, HCSL, and CMOS, providing compatibility with various downstream components without the need for external level translation. Designed for reliability in harsh conditions, the LMK00804B-Q1 meets AEC-Q100 Grade 1 qualification standards, ensuring robust operation across extended temperature ranges from –40°C to +125°C. It includes built-in diagnostics like lock detection, power-on reset, and fault monitoring, which enhance system-level safety and reduce the need for external supervision circuits. The device operates from a single 3.3V supply, minimizing power consumption while maintaining high efficiency. Its compact 32-pin QFN package enables space-efficient board layouts, crucial in modern embedded systems where footprint constraints are significant. The LMK00804B-Q1 supports I²C serial interface for real-time configuration and monitoring, allowing dynamic adjustments to output frequencies and modes without interrupting system operation. This feature simplifies production testing and field updates, improving overall system flexibility. Common applications include automotive infotainment systems, ADAS (Advanced Driver Assistance Systems), industrial automation controllers, and communication equipment where stable, low-jitter clock signals are essential for reliable data transmission and processing. By integrating multiple functions into a single chip, the LMK00804B-Q1 reduces component count, simplifies design complexity, and lowers total system cost while enhancing performance.