ICS502MI

Clock Generators, PLLs, Frequency Synthesizers Overview

The ICS502MI is a LOCO™ PLL clock multiplier manufactured by Renesas Electronics Corporation (formerly IDT). It generates high-frequency clock outputs from low-frequency crystal or clock inputs. The device supports input frequencies of 5–27 MHz for crystals and 2–50 MHz for clocks, producing output frequencies up to 190 MHz at VDD = 4.5V–5.5V. It features six ROM-stored multiplication factors selectable via pins S0 and S1. Operating on a 3.0V to 5.5V supply, it utilizes an advanced low-power CMOS process with a maximum operating temperature of +85°C in the industrial grade.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero ppm multiplication error using Phase-Locked Loop (PLL) techniques
• Low jitter performance with 50 ps one sigma specification
• Six internal multiplication factors stored in ROM for common frequency generation
• Compatible with TTL levels providing 25 mA drive capability

Clock Generators, PLLs, Frequency Synthesizers Applications

• Replacing crystal oscillators in electronic systems
• Generating reference clocks for CPUs
• Clock generation for general-purpose digital circuits

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity as the ICS502 series has reached End-of-Life (EOL) status for non-green parts effective May 13, 2010. Confirm RoHS compliance requirements; the 'LF' suffix indicates lead-free packaging. Ensure the specific ordering suffix matches the required temperature range and package type before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the ICS502MI variant for industrial temperature operation ranging from -40°C to +85°C. Output frequency capabilities depend on supply voltage: up to 160 MHz at 4.5V–5.5V and up to 120 MHz at 3.0V–3.6V. Use pin connections S0 and S1 to select the desired multiplication factor from the six available ROM options.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The ICS502 belongs to the LOCO™ (Low Cost Oscillator) family designed to replace discrete crystal oscillators. Originally produced by Integrated Device Technology (IDT), the product line was acquired by Renesas Electronics Corporation. The device simplifies board design by integrating PLL circuitry and ROM configuration into a single 8-pin SOIC package.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Designers should consult official documentation for current equivalent components or updated product lines.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How are the output frequencies determined?

Output frequencies are determined by the input frequency multiplied by one of six factors stored in the chip's ROM. The specific factor is selected by connecting pins S0 and S1 to Ground, VDD, or leaving them floating.

What is the maximum output frequency achievable?

The maximum output frequency is 190 MHz when the supply voltage is between 4.5V and 5.5V at room temperature (+25°C).

Is input-to-output skew guaranteed?

No, input-to-output skew and jitter are not defined or guaranteed for the ICS502. Applications requiring defined skew should use the ICS570B.