IDT49FCT3805DPYI

Clock Buffers, Drivers Overview

The IDT49FCT3805DPYI 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 guarantees low skew (<270ps max), very low propagation delay (<3ns max for D grade), and operates up to 133MHz.

Clock Buffers, Drivers Feature Summary

• Dual 1-to-5 clock driver banks with independent 3-state output enables
• Guaranteed low skew < 270ps (max.) and propagation delay < 3ns (max.)
• TTL compatible inputs and outputs; inputs driven by 3.3V or 5V components
• "Heartbeat" monitor output for diagnostics and PLL driving
• Industrial temperature range (-40°C to +85°C)

Clock Buffers, Drivers Applications

• High speed clock distribution systems requiring low skew
• Address distribution where one signal must be distributed to multiple receivers
• Single point-to-point transmission line driving applications

Clock Buffers, Drivers Procurement Notes

Verify the specific suffix DPYI corresponds to the Shrink Small Outline IC (SSOP) package with Industrial temperature rating (-40°C to +85°C) as per the ordering information table. Confirm availability status as this component may be subject to discontinuation or lifecycle changes common in legacy FCT series parts.

Clock Buffers, Drivers Selection Notes

Select the IDT49FCT3805DPYI when dual independent 1:5 clock buffering is required with strict skew constraints. Ensure the application voltage is 3.3V ± 0.3V. For higher frequency requirements up to 166MHz, consider the E-grade variant (IDT49FCT3805DE...) instead of the D-grade part specified here.

Clock Buffers, Drivers Part Context

This component belongs to the IDT 49FCT3805 family of 3.3V CMOS clock drivers. The 'D' suffix indicates the D-grade speed bin (max 133MHz, max 3ns delay), while 'PY' denotes the SSOP package. The 'I' suffix specifies the industrial temperature range. It is functionally similar to the 49FCT3805E but with relaxed timing specifications.

Clock Buffers, Drivers Replacement Considerations

Public confirmed substitute part numbers include PI49FCT3805DQE from Diodes Incorporated, which offers similar 1:5 fanout functionality in a QSOP package.