ICS580M-01I

Clock Buffers, Drivers Overview

The ICS580M-01I is a glitch-free clock multiplexer manufactured by Renesas Electronics Corporation. It switches between two input clocks (INA and INB) without generating short pulses or glitches on the output. The device operates within a frequency range of 2 MHz to 270 MHz, depending on supply voltage. It features selectable timeout periods for clock detection via the DIV pin, allowing automatic switching when an input clock stops. The component supports split power supplies (VDDI and VDDC) for voltage translation and includes dedicated output enable pins for unused outputs.

Clock Buffers, Drivers Feature Summary

• Glitch-free switching between two clock sources with no short pulses
• Operates from 2 MHz to 270 MHz maximum frequency
• Selectable clock detection timeouts (600 ns or 75 ns nominal)
• Split power supply support (VDDI/VDDC) for voltage translation

Clock Buffers, Drivers Applications

• Systems requiring redundant or backup clock sources
• Clock distribution networks needing seamless source switching
• Applications requiring clock failure detection and reporting

Clock Buffers, Drivers Procurement Notes

Verify RoHS compliance status as non-green parts reached End-of-Life on May 13, 2010. Confirm package availability (SOIC vs TSSOP) and temperature grade (Industrial -40°C to +85°C). Check current distributor stock levels due to potential discontinuation.

Clock Buffers, Drivers Selection Notes

Select ICS580M-01I for industrial temperature range (-40°C to +85°C). Ensure VDDI is greater than or equal to VDDC for correct operation. Use OE pins to tri-state unused outputs. Connect decoupling capacitors (0.01µF) to VDDI and VDDC. Consider ICS581-01/02 for zero-delay buffering requirements.

Clock Buffers, Drivers Part Context

Part of the ICS580 family of glitch-free clock multiplexers. The 'M' suffix indicates commercial temperature range in some variants, but 'I' denotes Industrial grade. Manufactured originally by IDT, now under Renesas Electronics. Available in 16-pin SOIC and TSSOP packages.

Clock Buffers, Drivers Replacement Considerations

ICS581-01 or ICS581-02 offer zero-delay buffering with smooth switching. Verify pin compatibility and electrical specifications before substitution. Check for updated RoHS-compliant versions if environmental regulations require.

Clock Buffers, Drivers FAQ

How does the ICS580M-01I handle clock switching?

It switches between INA and INB inputs controlled by SELB, ensuring no glitches or short pulses appear on the output during transition.

What determines the clock detection timeout?

The DIV pin selects the timeout period: Logic 0 provides ~600 ns nominal timeout, while Logic 1 provides ~75 ns nominal timeout.

Can the input and output voltages differ?

Yes, VDDI powers the input buffers and can be higher than VDDC, which powers the rest of the chip and sets output amplitude, enabling voltage translation.