CDCM1804RGETG4

Overview

The CDCM1804RGETG4 is a clock buffer and driver manufactured by Texas Instruments, designed for high-frequency signal distribution. It features a 1:4 fanout ratio with differential input and output capabilities, supporting maximum frequencies of 800 MHz. The device operates on a supply voltage range of 3V to 3.6V and accepts various input logic levels including CML, HSTL, LVDS, LVPECL, LVTTL, SSTL-2, and VML. Outputs are available in LVCMOS or LVPECL configurations. Packaged in a 24-VFQFN exposed pad format, it functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• 1:4 Fanout Ratio: Distributes a single input clock signal to four independent outputs.
• High Frequency Operation: Supports clock frequencies up to 800 MHz.
• Flexible Input Compatibility: Accepts CML, HSTL, LVDS, LVPECL, LVTTL, SSTL-2, and VML inputs.
• Configurable Outputs: Provides selectable LVCMOS or LVPECL output types.

Applications

• Clock distribution networks in high-speed digital systems
• Fan-out buffering for memory interfaces
• Signal distribution in telecommunications equipment
• Clocking solutions for FPGA and ASIC designs

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and environmental compliance. Confirm that the 24-VFQFN package dimensions match the target PCB footprint requirements. Check moisture sensitivity level (MSL) ratings prior to soldering to prevent damage during assembly processes.

Selection Notes

Select this component when a 1:4 split is required for signals up to 800 MHz. Ensure the system power supply remains stable between 3V and 3.6V. Verify that the chosen output type (LVCMOS or LVPECL) matches the receiving device's input specifications. Consider thermal management requirements given the surface mount package and operating temperature range.

Part Context

This part belongs to the CDCM1804 series of clock buffers. It serves as a specialized solution for distributing reference clocks in complex electronic architectures where signal integrity and low skew are critical. The device integrates multiple logic compatibility options to simplify interface design across different subsystems.

Replacement Considerations

Check for direct pin-to-pin replacements within the same family, such as other variants in the CDCM180x series, ensuring identical pin counts and electrical characteristics. Verify functional equivalence regarding input/output voltage levels and maximum frequency limits before substitution.