844256DGLF

Product Overview

The 844256DGLF from Renesas Electronics Corporation is a FemtoClock® clock/frequency synthesizer and fanout distribution IC intended for single-circuit timing architectures. It accepts a crystal input and provides LVDS outputs, with a maximum frequency of 625MHz and a 1:6 input-to-output ratio. The device includes a PLL with bypass, divider capability, and a 24-TSSOP exposed-pad package for surface-mount placement. Its specified supply range is 3.135V to 3.465V, and it operates from 0°C to 70°C.

Key Features

• Clock/frequency synthesizer with fanout distribution, using a crystal input and LVDS output.
• PLL with bypass and 1:6 input-to-output ratio, supporting divider function.
• Maximum frequency of 625MHz in a single-circuit configuration.
• Differential output interface with non-differential input.
• 3.135V to 3.465V supply range and 0°C to 70°C operating temperature.
• 24-TSSOP exposed-pad surface-mount package, 4.40 mm width.

Applications

• Clocking for high-speed digital interfaces.
• Crystal-based reference clock generation for board-level timing.
• Fanout distribution of a single timing source across a printed circuit board.

Design & Procurement Notes

For design and procurement planning, confirm that the board supply can hold the 3.135V to 3.465V range and that the operating environment remains within 0°C to 70°C. The 24-TSSOP exposed-pad package requires surface-mount assembly and attention to pad layout and thermal handling. Because the device uses a crystal input and LVDS differential outputs, the clock tree should be planned around the 1:6 ratio, 625MHz maximum frequency, PLL bypass, and divider function to match downstream loads.