IDT49FCT3805EQI8

Clock Buffers, Drivers Overview

The IDT49FCT3805EQI8 is a 3.3V CMOS dual 1-to-5 clock driver designed for high-speed clock distribution where signal quality and skew are critical. It consists of two independent driver banks, each providing a 1:5 fanout with dedicated 3-state output enable control (OEA, OEB). The device features TTL-compatible inputs and outputs, allowing driving from 3.3V or 5V components. It includes a 'heartbeat' monitor output (MON) identical to other outputs for diagnostics and PLL driving. Built using advanced CMOS technology, it supports operating frequencies up to 166MHz with guaranteed low skew and very low propagation delay.

Clock Buffers, Drivers Feature Summary

• Dual 1-to-5 fanout configuration with independent 3-state output enable controls
• Operating frequency up to 166MHz with maximum propagation delay under 2.5ns
• Guaranteed low skew of less than 200ps (max.) and duty cycle distortion under 270ps
• Includes a 'heartbeat' monitor output (MON) for system diagnostics

Clock Buffers, Drivers Applications

• High-speed clock distribution systems requiring low skew
• Address distribution in point-to-point transmission lines
• PLL driving applications utilizing the heartbeat monitor output

Clock Buffers, Drivers Procurement Notes

Verify the package type matches the required design; the suffix GI8 indicates a QSOP package with an industrial temperature range (-40°C to +85°C). Confirm RoHS compliance status through official manufacturer documentation as specifications may vary by revision. Ensure supply chain sources provide valid traceability for the Integrated Device Technology brand now part of Renesas Electronics.

Clock Buffers, Drivers Selection Notes

Select the IDT49FCT3805EQI8 over the D variant when higher speed performance is required, as the E grade supports frequencies up to 166MHz compared to 133MHz for the D grade. The E grade also offers improved propagation delay characteristics (max 2.5ns vs 3ns) and lower output rise/fall times (1ns vs 1.5ns). Both variants share the same pinout and electrical interface requirements.

Clock Buffers, Drivers Part Context

This component belongs to the FCT3805 family of 3.3V CMOS clock drivers manufactured by Integrated Device Technology (IDT), which has since been acquired by Renesas Electronics. The product line is designed for applications demanding precise timing and low jitter. The specific EQI8 designation identifies the industrial temperature grade, QSOP packaging, and tape-and-reel delivery format.

Clock Buffers, Drivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.