ICS650R-01

Clock Generators, PLLs, Frequency Synthesizers Overview

The ICS650R-01 is a low-cost, high-performance clock synthesizer designed for system peripheral applications. It utilizes analog/digital Phase-Locked Loop (PLL) techniques to accept a parallel resonant 14.31818 MHz crystal input and generate up to eight output clocks. The device provides specific frequencies for PCI, SCSI, Fast Ethernet, Ethernet, USB, and AC97 interfaces. All generated frequencies exhibit less than one ppm synthesis error. It operates at 3.3 V or 5 V and includes selectable frequencies for USB and AC97 audio clocks.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates up to eight output clocks from a single 14.31818 MHz input
• Less than one ppm synthesis error across all clocks
• Supports 3.3 V or 5 V operating voltage
• Includes OE pin to tri-state outputs for board-level testing

Clock Generators, PLLs, Frequency Synthesizers Applications

• PCI bus clocking
• SCSI interface clocking
• Fast Ethernet and Ethernet clocking
• USB controller clocking
• AC97 audio interface clocking

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the ordering suffix to confirm package type and temperature range. Suffixes 'LF' indicate lead-free packaging, while 'I' denotes industrial grade operation (-40°C to +85°C). Standard commercial grade parts operate from 0°C to +70°C. Confirm availability of tape and reel options if required for automated assembly processes.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select based on required operating temperature range and supply voltage. Ensure the external crystal matches the 14.31818 MHz parallel resonant specification with appropriate load capacitance. Use PSEL, USEL, and ASEL pins to configure specific output frequencies according to the application requirements defined in the datasheet tables.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the ICS650 series of system peripheral clock sources manufactured by Integrated Device Technology (IDT), now part of Renesas Electronics Corporation. The 'R' suffix typically indicates a RoHS-compliant version within this product family.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other variants within the ICS650 series such as ICS650-01, ICS650R-01LF, ICS650R-01I, and ICS650R-01ILF, which share identical functionality but differ in environmental rating or packaging compliance.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum synthesis error for the output clocks?

All clocks generated by the ICS650R-01 have a synthesis error of less than one ppm.

How are the processor clock frequencies selected?

Processor clock frequencies (PCLK1-PCLK4) are determined by the logic states of the PSEL0 and PSEL1 input pins.

What is the function of the OE pin?

The OE (Output Enable) pin puts all outputs into a high impedance state when driven low, facilitating board-level testing.