ICS621MI

Clock Buffers, Drivers Overview

The ICS621MI is a low skew, single-input to four-output clock buffer manufactured by Renesas Electronics Corporation. It operates from a single 1.2 V to 1.8 V supply and features a 3.3 V tolerant input clock, facilitating level translation. The device provides four LVCMOS outputs with a maximum propagation delay of 5 ns and an output-to-output skew of ±150 ps. It supports input frequencies up to 200 MHz at 1.8 V. The component is available in an 8-pin SOIC package and includes an Output Enable pin that tri-states the outputs when driven low.

Clock Buffers, Drivers Feature Summary

• Low skew outputs with a maximum deviation of ±150 ps between any two outputs
• Single 1.2 V to 1.8 V power supply operation with 3.3 V tolerant input
• Output Enable (OE) pin for tri-stating all four outputs
• Available in 8-pin SOIC or 8-pin DFN packages

Clock Buffers, Drivers Applications

• Level translation between 3.3 V logic and 1.2–1.8 V clock domains
• Clock distribution in systems requiring low skew synchronization
• Fan-out buffering for high-speed digital circuits

Clock Buffers, Drivers Procurement Notes

Verify RoHS compliance status as non-green parts reached End-of-Life on May 13, 2010. Confirm package type (SOIC vs. DFN) and temperature range (Industrial -40°C to +85°C vs. Commercial 0°C to +70°C) against specific ordering suffixes such as MI, MIT, M, or MT. Ensure lead-free (LF) variants are selected if required by environmental regulations.

Clock Buffers, Drivers Selection Notes

Select the ICS621MI variant based on required operating temperature range and packaging format. Industrial grade (-40°C to +85°C) is designated by suffixes like MI or MIT, while commercial grade (0°C to +70°C) uses M or MT. For tape and reel shipping, add the 'T' suffix. Ensure board layout maintains identical trace geometries and loads for all four outputs to preserve the specified ±150 ps skew performance.

Clock Buffers, Drivers Part Context

The ICS621 belongs to the IDT/ICS low skew clock buffer family. It is designed for applications requiring precise clock distribution without phase alignment loops. The device simplifies system design by integrating fan-out buffering and level shifting capabilities into a single small-footprint package, reducing component count compared to discrete solutions.

Clock Buffers, Drivers Replacement Considerations

Direct replacements include other 1:4 low skew clock buffers from Renesas or IDT with compatible voltage ranges and pinouts. Verify that substitute devices support 3.3 V input tolerance and offer similar skew specifications (±150 ps). Check for availability of RoHS-compliant versions if replacing older non-green stock.