ICS580M-01IT

Clock Buffers, Drivers Overview

The ICS580M-01IT is a glitch-free clock multiplexer manufactured by Renesas Electronics Corporation, originally designed by IDT. It switches between two input clocks (INA and INB) without generating short pulses or glitches on the output. The device supports frequencies up to 270 MHz at 5V supply and operates within a 2.5V to 5.5V range for VDDC. It features selectable timeout periods for clock detection via the DIV pin, independent output enables, and split power supplies (VDDI/VDDC) for voltage translation. Packaged in a 16-pin SOIC, it includes open-drain outputs indicating stopped clocks.

Clock Buffers, Drivers Feature Summary

• Glitch-free switching between two clock sources controlled by SELB pin
• Clock detection with selectable timeouts (600 ns or 75 ns nominal) via DIV pin
• Split power supplies allow VDDI > VDDC for input/output voltage translation
• Independent output enable pins (OE1-OE4) to tri-state unused outputs

Clock Buffers, Drivers Applications

• Systems requiring redundant or backup clock sources
• Automatic clock switchover when primary source fails
• Voltage translation between different clock domains

Clock Buffers, Drivers Procurement Notes

The ICS580M-01IT is listed as obsolete or end-of-life. Verification of current availability requires checking authorized distributors for remaining stock or alternative sourcing channels. Ensure compliance with RoHS requirements if lead-free variants are necessary, noting that non-green parts had an EOL date of May 13, 2010.

Clock Buffers, Drivers Selection Notes

Select this component for applications requiring low-skew, glitch-free multiplexing of two single-ended clock inputs. Verify that the operating frequency does not exceed 270 MHz at 5V or 220 MHz at 3.3V. Ensure the design accommodates the 16-pin SOIC package dimensions and utilizes separate decoupling capacitors for VDDI and VDDC supplies.

Clock Buffers, Drivers Part Context

This part belongs to the ICS580 family of glitch-free clock multiplexers from Integrated Device Technology (IDT), now part of Renesas Electronics. It is distinct from zero-delay buffer models like the ICS581 series. The 'M' suffix typically denotes commercial temperature range, while 'I' indicates industrial grade (-40°C to +85°C).

Clock Buffers, Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the verified documentation. Designers should consult Renesas or IDT technical support for direct replacements or evaluate similar glitch-free muxes from other manufacturers ensuring compatible pinouts and electrical specifications.