843251AG-04LFT

Clock Generators, PLLs, Frequency Synthesizers Overview

The Renesas 843251AG-04LFT is a FemtoClock clock synthesizer and jitter cleaner designed for high-performance digital systems. It features four LVPECL outputs with a maximum output frequency of 170 MHz, driven by an input frequency up to 25 MHz. The device operates on a single 3.3V supply (3.135V to 3.465V) within an industrial temperature range of -30°C to +85°C. Packaged in a compact TSSOP-24 surface-mount format, it consumes approximately 135 mA of operating current. This component is engineered to replace multiple discrete oscillators, reducing board space and system electromagnetic interference through configurable spread spectrum modulation capabilities.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates low-jitter clock signals using advanced PLL techniques to clean input references.
• Supports configurable spread spectrum modulation to minimize system-wide electromagnetic interference.
• Integrates four independent LVPECL outputs for driving multiple high-speed loads simultaneously.

Clock Generators, PLLs, Frequency Synthesizers Applications

• High-speed data communication equipment requiring precise clock distribution
• Test and measurement instruments needing low-phase-noise signal generation
• Telecommunications infrastructure utilizing LVPECL-compatible logic families

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix '04LFT' against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Ensure the design supports the required 3.3V power rail and LVPECL termination standards. Confirm that the TSSOP-24 package dimensions fit the target PCB footprint without clearance issues.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when low phase noise and jitter cleaning are critical for system stability. It is suitable for designs requiring multiple synchronized outputs from a single reference source. Consider the thermal performance of the TSSOP-24 package if operating near the upper temperature limits.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the FemtoClock family, known for ultra-low jitter performance. It serves as a direct replacement for older ICS branded variants, maintaining functional compatibility while offering updated manufacturing processes. The series is widely used in applications demanding high-frequency precision timing.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers include 843251AG-04LF and ICS843251AG-04LFT. Verify electrical specifications and pin assignments before substitution.