345RIPLFT

Clock Generators, PLLs, Frequency Synthesizers Overview

The ICS345RIPLFT is a triple PLL field-programmable clock synthesizer in a 20-pin SSOP package. It generates up to nine high-frequency outputs from a 5–27 MHz crystal or 2–50 MHz clock input, supporting frequencies up to 200 MHz at 3.3 V. The device features eight addressable registers and an OTP ROM for configuration. It includes spread spectrum modulation (±0.125% to ±2.0% center, -0.25% to -4.0% down) to reduce EMI. Operating voltage is 3.15–3.45 V, with an industrial temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Triple PLL architecture generating up to nine LVCMOS outputs
• Field programmability via VersaClock software and OTP ROM
• Spread spectrum modulation for EMI reduction
• Low-skew output banks with configurable divide ratios

Clock Generators, PLLs, Frequency Synthesizers Applications

• Replacing multiple crystals and oscillators in electronic systems
• Generating reference clocks for digital logic and processors
• Systems requiring low electromagnetic interference (EMI)

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the 'LF' suffix indicates Pb-free and RoHS compliance. Confirm the 'T' suffix specifies tape and reel shipping packaging. Ensure the 'I' suffix matches the required -40°C to +85°C industrial temperature rating for the design environment.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model for designs requiring up to nine independent clock outputs from a single reference. Use the VersaClock software to determine optimal M/N values and output divide settings. Ensure external decoupling capacitors (0.01µF) and crystal load capacitors are included in the PCB layout for stability.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the IDT/ICS VersaClock family of triple PLL synthesizers. It serves as a higher-output alternative to the ICS341 (one output), ICS342 (two outputs), and ICS343 (three outputs). The ICS348 is another variant within this series.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Factory-programmed custom versions include the 345RI-XXLF and 345RI-XXLFT. For lower output counts, consider the ICS341, ICS342, or ICS343.